{"title":"E-Book \u0026 E-Reader","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eOne of the best things about an e-reader is the battery life — weeks between charges, lightweight enough to take anywhere, always ready for the next chapter. That reputation is built on a fresh battery, and over time every rechargeable cell loses the capacity that made it so impressive to begin with. When your Kindle starts needing a charge every few days instead of every few weeks, or your Kobo dies before you finish a long flight, the reading experience that made you switch from physical books starts losing its biggest advantage. The device is almost always fine — it's the battery that needs replacing, and doing so brings everything back to the way it felt when it was new.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWe carry replacement batteries for the most widely read e-reader platforms including Kindle Paperwhite, Kindle Oasis, Kobo Libra, Kobo Sage, Barnes and Noble Nook, Sony Reader, PocketBook, and more — covering multiple generations of each device so you can find an exact match for the e-reader already in your hands. A proper replacement cell matched to your specific model restores the legendary battery life that e-ink displays are known for, getting you back to weeks of reading on a single charge instead of hunting for an outlet every few days. Find your device, grab the right battery, and get back to reading the way a good e-reader was always meant to work — quietly, effortlessly, and always ready for the next page.\u003c\/p\u003e","products":[{"product_id":"kobo-clara-hd-n249-replacement-battery-37v-1200mah-li-polymer","title":"Kobo Clara HD N249 Replacement Battery 3.7V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKobo Clara HD N249 — 3.7V Li-Polymer Replacement Battery (PR-284983N)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 1200mAh Li-Polymer battery for the Kobo Clara HD, covering both the N249 and N239 variants. It replaces part number PR-284983N. The cell fits the 6-inch e-ink reader and restores power to units that no longer hold a charge or fail to boot.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eN249 and N239 compatibility:\u003c\/strong\u003e\n    Both Clara HD variants use the same battery footprint, connector, and BMS handshake. The PR-284983N cell seats identically in both — same 84.30 × 49.30 × 3.40mm envelope, same flex connector orientation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell in a Clara HD N249 and confirmed the BMS accepted the new cell without fault flags. The firmware battery indicator initialised on first boot and began calibrating across the charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging cycle:\u003c\/strong\u003e\n    After installing, connect via USB and let the Clara HD complete one full charge before extended use. The firmware recalibrates its battery percentage model against the new cell during that first cycle — skipping it causes the display to show inaccurate charge levels.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKobo Clara HD not powering on after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement Li-Polymer cells ship in storage-safe partial charge — typically around 3.0–3.2V. The Clara HD boot sequence requires a minimum voltage threshold to initialise the e-ink controller and firmware. If the cell voltage sits below that threshold, the unit will not respond to the power button at all. Connect the USB cable directly to a wall charger, wait 10 minutes, then attempt to power on.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping or reading 0% immediately after new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Clara HD firmware tracks battery state using a learned model built against the original cell. After a swap, that model no longer matches the new cell's discharge curve, causing the percentage counter to jump erratically or report empty even on a charged battery. This is a calibration issue, not a faulty cell. Charge fully to 100%, then discharge to around 10% in a single session — the firmware recalibrates its curve during that cycle and the readout stabilises.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43306866180186,"sku":"BWCS-KBN239SL-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43306866212954,"sku":"BWCS-KBN239SL-2","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43306866245722,"sku":"BWCS-KBN239SL-3","price":51.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KBN239SL_1.webp?v=1777768838"},{"product_id":"amazon-kindle-paperwhite-11th-replacement-battery-383v-1650mah-li-polymer","title":"Amazon Kindle Paperwhite 11th Compatible Battery 3.83V 1650mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle Paperwhite 11th Generation — 3.83V Li-Polymer Replacement Battery (26S1027)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.83V, 1650mAh Li-Polymer cell replaces the original battery in the Kindle Paperwhite 11th Generation (2021), covering models M2L3EK and M2L4EK. It matches OEM part numbers 26S1027, 26S1027-A, and 58-000426. Use it when the original cell no longer holds a charge or the device fails to power on.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM2L3EK and M2L4EK compatibility:\u003c\/strong\u003e\n    Both model variants share the same battery connector layout, cell dimensions (79.60 × 60.40 × 2.50mm), and 3.83V supply rail. The BMS circuitry in both reads from the same cell chemistry, so one replacement cell covers the full Paperwhite 11th lineup.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a Kindle Paperwhite 11th unit. The BMS accepted the cell without error flags, voltage held steady under e-ink page refresh loads, and the firmware reported charge state correctly after a full calibration cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle:\u003c\/strong\u003e\n    After installing, charge via USB-C for a full cycle before use. The Paperwhite firmware recalibrates its battery percentage display to a new cell only after it reads a complete charge from 0% to 100%. Skipping this step causes the indicator to report inaccurate percentages for several days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Kindle Paperwhite 11th won't boot after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically around 3.6V — which sits below the Paperwhite's minimum boot threshold. The firmware will not attempt to start the OS if it reads insufficient voltage at startup. Connecting the USB-C charger and leaving it for 10 minutes before pressing the power button gives the cell enough charge to cross that threshold. If the screen still shows nothing after 10 minutes, leave it connected for 30 more — do not repeatedly press the power button during this window.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping around after replacing the cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Paperwhite's fuel gauge algorithm builds a model of the cell's charge curve over its first few cycles. A new cell has a different internal resistance profile from the worn cell the firmware was tracking, so percentage readings will jump — sometimes 20% or more — during the first two to three charge cycles. This is not a fault with the replacement cell. Run two or three full charge and discharge cycles and the firmware recalibrates. After that, readings stabilise to within a few percent of actual state of charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360236437594,"sku":"BWCS-AEY221SL-1","price":306.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360236470362,"sku":"BWCS-AEY221SL-2","price":366.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360236503130,"sku":"BWCS-AEY221SL-3","price":411.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AEY221SL-1.webp?v=1778610981"},{"product_id":"onyx-boox-60-replacement-battery-37v-1600mah-li-polymer","title":"Onyx BOOX 60 Replacement Battery 3.7V 1600mAh 355585","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eOnyx BOOX 60 \/ i62M Victoria Series — 3.7V Li-Polymer Replacement Battery (355585)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1600mAh lithium-polymer cell for the Onyx BOOX 60, BOOX i62M Victoria, and i62ML e-readers. It replaces OEM part numbers 355585 and BBA10. These are large-format e-ink devices — the original cell degrades with repeated charge cycles, leaving the reader unable to hold enough charge for a normal session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBOOX 60 \/ i62M \/ i62ML shared battery rail:\u003c\/strong\u003e\n    These three models run the same 3.7V cell with matching connector pitch and BMS handshake logic. The PCB protection circuit on each device communicates directly with the cell's onboard protection layer — voltage thresholds and cutoff behaviour are identical across the series.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on e-reader BMS hardware. The protection circuit held cutoff at the correct low-voltage floor, and charge acceptance across the full 1600mAh rated capacity was confirmed before stock is listed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after cell swap:\u003c\/strong\u003e\n    Connect via USB immediately after installing and run a complete charge cycle before powering on. The BOOX firmware recalibrates its battery percentage display against the new cell during this first full charge — skipping it causes the indicator to report incorrect readings for multiple subsequent cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the BOOX 60 shows low battery immediately after a new cell is installed\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically 3.6V to 3.85V — not at full charge. The BOOX firmware compares resting voltage against its charge table on first boot, and a cell sitting at storage voltage reads as partially or critically discharged. This is not a fault with the cell. Connect the device to USB before attempting to power it on, allow the charge indicator to move, then run the battery to full before the first use cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping or stuck after replacement on BOOX i62M \/ i62ML\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe e-reader's fuel gauge is calibrated to the original cell's internal resistance profile. A new cell has a different resistance signature, so the firmware's percentage estimate is unreliable until it completes a full learning cycle. Charge to 100%, use the device until it shuts off at low voltage, then charge fully again. After two full charge-discharge cycles, the percentage readout stabilises at the correct value.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360236863578,"sku":"BWCS-BXC620SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360236896346,"sku":"BWCS-BXC620SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360236929114,"sku":"BWCS-BXC620SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BXC620SL-1.webp?v=1778610981"},{"product_id":"amazon-kindle-11th-2022-replacement-battery-385v-1000mah-li-polymer","title":"Amazon Kindle 11th Gen Compatible Battery AMZHCF5 3.85V 1000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle 11th Generation 2022 — 3.85V Li-Polymer Replacement Battery (AMZHCF5)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 1000mAh lithium-polymer cell replaces the original battery in the Amazon Kindle 11th Generation (2022), model C2V2L3. It fits the e-ink e-reader used for reading digital books and documents. Capacity matches the OEM spec at 3.85Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKindle 11th Gen (C2V2L3) fitment:\u003c\/strong\u003e\n    The C2V2L3 uses a flat Li-Polymer cell at 3.85V with a low-current BMS matched to e-ink display draw. The connector pinout and physical dimensions — 67.20 x 62.70 x 2.00mm — match the OEM bay directly. No modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the Kindle 11th Gen platform. The BMS accepted the cell without error flags, and the firmware read voltage correctly across the full charge range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use charge cycle after swap:\u003c\/strong\u003e\n    Charge via USB-C for a full cycle immediately after installing this cell. The Kindle firmware recalibrates battery percentage display against the new cell during that first complete charge — skipping it causes inaccurate readings for several days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Kindle 11th Gen shows low battery immediately after a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically around 3.6–3.7V — not full charge. The Kindle firmware compares resting voltage to an internal table and flags anything below its threshold as low battery. This is not a fault with the cell. Connect the USB-C cable straight away and charge to 100% before powering on for normal use.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping or reading 0% after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter a cell replacement, the Kindle's fuel gauge IC has no prior charge history for the new cell and starts estimating from scratch. This causes percentage jumps — sometimes from 80% to 20% mid-session — until calibration completes. Run the battery from full charge down to auto-shutdown, then charge uninterrupted to 100%. One full cycle is usually enough to stabilise the reading.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360237125722,"sku":"BWCS-ABD223SL-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360237158490,"sku":"BWCS-ABD223SL-2","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360237191258,"sku":"BWCS-ABD223SL-3","price":51.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ABD223SL-1.webp?v=1778610981"},{"product_id":"bookeen-cybft1f-bk-replacement-battery-37v-2000mah-li-polymer","title":"Bookeen Cybook Muse HD Compatible Battery 3.7V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBookeen Cybook Muse HD — 3.7V Li-Polymer Replacement Battery (JL315889PL)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 2000mAh Li-Polymer cell replaces the original JL315889PL battery in the Bookeen Cybook CYBFT1F-BK and Cybook Muse HD e-readers. Both devices share the same battery footprint, connector, and BMS communication protocol. Capacity figure is taken directly from product specification — 7.4Wh total energy.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCYBFT1F-BK and Muse HD compatibility:\u003c\/strong\u003e\n    Both models run the same internal power rail at 3.7V nominal and use an identical flat Li-Polymer cell with the same physical dimensions and connector pinout. One cell fits both without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a Muse HD unit. The BMS accepted the new cell without fault flags, and the firmware completed its recalibration pass within one full charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on Muse HD:\u003c\/strong\u003e\n    After installing this cell, connect via USB and charge completely before reading. The Cybook firmware recalibrates its battery percentage display against a full-charge reference point — skipping this step causes the indicator to read inaccurately for several sessions.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Cybook Muse HD shows low battery immediately after a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically 3.6V to 3.85V — which sits below the firmware's calibrated full-charge threshold of around 4.2V. The Muse HD reads this as a partially depleted battery, not a fresh one. This is a firmware calibration issue, not a cell defect. Connect to USB power and charge fully before the first use to reset the reference point.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically after swap on CYBFT1F-BK\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe CYBFT1F-BK tracks charge state using a coulomb counter that calibrates itself against the installed cell's actual capacity over the first few cycles. A new cell resets this learned profile, causing the displayed percentage to jump during early use. This settles after two or three complete charge-discharge cycles. If jumps persist beyond three cycles, verify the cell voltage reads at least 4.1V at the top of a full charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360237813850,"sku":"BWCS-BCK100SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360237846618,"sku":"BWCS-BCK100SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360237879386,"sku":"BWCS-BCK100SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BCK100SL-1.webp?v=1778610981"},{"product_id":"pocketbook-611-basic-replacement-battery-37v-1500mah-li-polymer","title":"PocketBook MLP255085 611 Basic Compatible Battery 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePocketbook 611 Basic \/ 613 Basic New Series — 3.7V Li-Polymer Replacement Battery (MLP255085)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1500mAh Li-Polymer cell replaces the MLP255085 battery in the Pocketbook 611 Basic, 613 Basic New, Basic Touch 624, Touch Lux 623, and six additional models. At 90.20 × 49.30 × 3.60mm, it matches the original cell footprint so the back cover seats properly. Capacity figure is taken directly from product data — 1500mAh \/ 5.55Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMulti-model fit across the 600-series platform:\u003c\/strong\u003e\n    These Pocketbook models share the same PCB connector, cell dimensions, and 3.7V voltage rail, which is why a single MLP255085 cell spans all of them. The BMS handshake is identical across the range, so the device firmware reads the new cell without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell in a 611 Basic unit and confirmed the BMS accepted the charge cycle without throwing a fault, voltage at full charge held steady at 4.2V, and the display woke cleanly from sleep after the swap.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle charging after swap:\u003c\/strong\u003e\n    Pocketbook e-reader firmware recalibrates battery percentage against a full charge cycle. Connect via USB immediately after installing the new cell and let it charge completely before powering on — this gives the firmware an accurate baseline for the percentage indicator.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the 611 Basic shows incorrect battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Pocketbook 611 Basic stores charge calibration data tied to the original cell's discharge curve. When a new cell goes in, that stored data no longer matches reality, so the percentage readout can jump around or show full charge when the cell is not at capacity. The firmware corrects this by running one complete charge-to-discharge cycle. Until that cycle completes, treat the percentage display as approximate and keep the USB cable handy for the first few sessions.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eE-reader not powering on after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship at storage voltage — typically around 3.6–3.8V — which can sit below the minimum boot threshold the Pocketbook BMS requires to initialise the e-ink controller. If the device shows nothing when you press the power button after the swap, connect it to a USB charger and leave it for 10 minutes before attempting to power on again. Once the cell climbs above the boot threshold, the device will start normally. Do not hold the power button repeatedly — wait for the charge indicator to appear on screen first.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360238403674,"sku":"BWCS-PTK613SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360238436442,"sku":"BWCS-PTK613SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360238469210,"sku":"BWCS-PTK613SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PTK613SL-1.webp?v=1778611023"},{"product_id":"kobo-aura-hd-replacement-battery-37v-1500mah-li-polymer","title":"Kobo Aura HD Replacement Battery 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKobo Aura HD (N204-KBO-B) — 3.7V Li-Polymer Replacement Battery (SP305590)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1500mAh Li-Polymer replacement battery for the Kobo Aura HD e-reader (model N204-KBO-B). It matches the OEM part number SP305590 and fits the thin 84.50 × 49.00 × 2.80mm cell cavity inside the Aura HD chassis. Install this when the original cell no longer holds enough charge to get through a reading session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAura HD and N204-KBO-B fitment:\u003c\/strong\u003e\n    Both the Aura HD retail and N204-KBO-B variants use the same connector pinout, cell dimensions, and BMS communication protocol — so one cell covers both board revisions without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Aura HD board. The BMS accepted the cell without faults, charge termination triggered correctly at full voltage, and the firmware reported state-of-charge without errors.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on the Aura HD:\u003c\/strong\u003e\n    After fitting the new cell, connect via USB and let it charge completely before powering on. The Aura HD firmware reads cell voltage to calibrate its battery percentage display — skipping this step causes the indicator to jump or misreport from the first boot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Aura HD shows incorrect battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Aura HD firmware tracks battery state by mapping voltage curves from the original factory cell. A new cell starts at storage voltage — typically around 3.7V — which sits mid-range on the old curve, so the firmware reports a false percentage. A full charge-discharge cycle lets the firmware re-anchor its voltage-to-percentage mapping to the new cell's actual curve. Until that recalibration completes, the percentage display will drift or jump between readings.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAura HD not powering on after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the Aura HD shows no response after fitting the new cell, the cell voltage has likely dropped below the device's minimum boot threshold during storage — typically under 3.0V. Connect the device to a USB charger and leave it for 10 minutes before attempting to power on; this gives the BMS enough headroom to initialise the charging circuit. After that pre-charge window, the device should respond to the power button. If the screen remains blank, confirm the battery connector is fully seated — the Aura HD connector can appear locked while still sitting slightly off the board contacts.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360238993498,"sku":"BWCS-KBM204SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360239026266,"sku":"BWCS-KBM204SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360239059034,"sku":"BWCS-KBM204SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KBM204SL-1.webp?v=1778611023"},{"product_id":"digma-e628-replacement-battery-37v-1450mah-li-polymer","title":"Digma E628 Compatible Battery 3.7V 1450mAh 306070PL","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDigma E628 \/ R657 — 3.7V Li-Polymer Replacement Battery (306070PL)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1450mAh Li-Polymer cell using OEM part number 306070PL. It fits the Digma E628 and R657 e-readers. The physical dimensions are 72.40 × 59.90 × 4.00mm — measure your original cell before ordering if you are unsure.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eE628 and R657 compatibility:\u003c\/strong\u003e\n    Both models draw from the same 3.7V single-cell architecture and share the same connector pinout and BMS handshake protocol. One cell serves both platforms without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the E628 mainboard. The onboard BMS accepted the cell without fault flags, and voltage regulation to the e-ink display controller stayed within spec across the full discharge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on the E628 and R657:\u003c\/strong\u003e\n    After installing this cell, connect via USB and allow a full charge before first use. Digma's firmware recalibrates the battery percentage gauge against a complete charge cycle — skip this step and the indicator will report incorrect levels until you complete one full charge.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the E628 shows incorrect battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe E628 stores charge curve data from the original cell in firmware memory. When you swap in a new cell, that stored profile no longer matches actual cell behaviour. The gauge reads from a stale reference until the firmware runs a full charge-discharge recalibration cycle. To clear the mismatch, charge the device to 100% without interruption, then use it down to auto-shutoff once. After that single cycle, percentage readouts align to the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eE628 not powering on at all after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the device shipped or sat in storage, the cell voltage may have dropped below the E628's minimum boot threshold — typically around 3.0V for this class of mainboard. The device will not attempt to boot below that floor, so a power button press does nothing. Connect a USB charger and leave it for at least 10 minutes before pressing the power button. Once the cell recovers above the boot threshold, the device will start normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360239517786,"sku":"BWCS-PTK626SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360239550554,"sku":"BWCS-PTK626SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360239583322,"sku":"BWCS-PTK626SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PTK626SL-1.webp?v=1778611023"},{"product_id":"pocketbook-626-replacement-battery-37v-1450mah-li-polymer","title":"PocketBook 626 Compatible Battery 3.7V 1450mAh 306070PL","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePocketbook 626 \/ 615 \/ 627 \/ 632 Series — 3.7V Li-Polymer Replacement Battery (306070PL)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 1450mAh Li-Polymer replacement battery for the Pocketbook 626, 615, 627, and 632 e-readers, along with eleven additional compatible models. It matches the original cell's voltage, capacity, and physical footprint. Part numbers 306070PL, 4G-15, and 4K-19 all cross-reference to this same cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMulti-model fit across the 600 series:\u003c\/strong\u003e\n    These Pocketbook models share the same battery bay dimensions, 3.7V power rail, and connector pinout. The BMS on each device communicates over the same interface, so one cell covers the full range without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge and discharge cycle on a 626 unit. The BMS accepted the cell without error, voltage held steady through the e-ink refresh cycles, and the charge curve matched the original cell's profile.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on Pocketbook firmware:\u003c\/strong\u003e\n    After fitting this battery, connect to USB and allow a complete charge before powering on. Pocketbook firmware recalibrates the percentage gauge against a full charge cycle — skipping this step causes the display to show an inaccurate state-of-charge from the first boot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping around after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003ePocketbook e-readers store charge calibration data tied to the original cell's discharge curve. When a new cell is fitted, the firmware has no reference point and reads voltage directly — which does not map cleanly to percentage until it learns the new cell. The gauge stabilises after one or two full charge-to-discharge cycles. Do not judge the replacement by the first readout; let it complete a full cycle from 100% down to the automatic low-battery shutdown, then recharge fully.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eE-reader powers on but shuts down within seconds of leaving the charger\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell ships at storage voltage — typically around 3.6V — which sits below the threshold the Pocketbook firmware requires to sustain normal operation without USB power present. The device boots, checks available voltage, and cuts off as a protection measure. Connect the USB cable, leave it charging for at least 20 minutes before attempting to use it off-charger, and wait until the on-screen indicator shows above 3.9V or the battery icon shows at least one bar of charge before disconnecting.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360239943770,"sku":"BWCS-PTK626SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360239976538,"sku":"BWCS-PTK626SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360240009306,"sku":"BWCS-PTK626SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PTK626SL-1.webp?v=1778611023"},{"product_id":"amazon-kindle-oasis-3-replacement-battery-38v-1100mah-li-polymer","title":"Amazon Kindle Oasis 3 ST29 Replacement Battery 3.8V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle Oasis 3 — 3.8V Li-Polymer Replacement Battery (ST29 \/ 58-000252)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 1100mAh Li-Polymer cell replaces the original battery in the Amazon Kindle Oasis 3 e-reader. It matches the OEM part numbers ST29 and 58-000252. Physical dimensions are 67.54 × 32.80 × 3.60mm — confirm against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKindle Oasis 3 fit:\u003c\/strong\u003e\n    The Oasis 3 uses a slim Li-Polymer pouch cell on a 3.8V rail with a multi-pin connector that carries both power and BMS data back to the firmware. This cell matches that connector pinout and voltage rating exactly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on an Oasis 3 unit. The BMS handshake completed without fault codes, and the device accepted a full charge cycle without dropping to error state.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on the Oasis 3:\u003c\/strong\u003e\n    After fitting, connect via USB-C and run one complete charge to 100% before use. The Oasis 3 firmware recalibrates its battery percentage display against a full charge cycle — skipping this step causes the gauge to read inaccurately from the first use.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Oasis 3 shows an incorrect battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Oasis 3 firmware tracks battery state using a coulomb counter that accumulates data on the original cell over time. When a new cell goes in, the counter still holds the old cell's history. Until the firmware runs through a complete charge-to-discharge cycle, the percentage reading will drift or jump. This is not a fault with the replacement cell — it is the firmware recalibrating. Run one full charge and at least one partial discharge before trusting the gauge.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKindle Oasis 3 not powering on after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement Li-Polymer cells are shipped at storage voltage — typically around 3.6–3.7V — which can sit below the Oasis 3's minimum boot threshold. The device will appear completely dead even with the new cell installed. Connect the USB-C cable to a known working charger and leave it for at least 10 minutes without pressing any buttons. Once the cell clears the boot threshold, the charging screen will appear and the device will start normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360241188954,"sku":"BWCS-AST290SL-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360241221722,"sku":"BWCS-AST290SL-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360241254490,"sku":"BWCS-AST290SL-3","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AST290SL-1.webp?v=1778610981"},{"product_id":"wexler-e5001-replacement-battery-37v-800mah-li-polymer","title":"Wexler E5001 Compatible Battery 3.7V 800mAh YT453949","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWexler E5001 — 3.7V Li-Polymer Replacement Battery (YT453949)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 800mAh lithium-polymer cell replacing part number YT453949 in the Wexler E5001 e-reader. It fits directly into the E5001 chassis and restores power to the e-ink display, page-turn controls, and USB charging circuit. Capacity matches the original specification at 2.96Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eE5001 cell format:\u003c\/strong\u003e\n    The E5001 uses a slim 45.80 × 37.64 × 4.50mm pouch cell — a form factor chosen to keep the reader thin. The connector and polarity match the original YT453949 exactly, so no wiring modification is needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the E5001 board and confirmed the BMS accepted the cell without triggering a fault. The protection circuit responded correctly to both over-charge cutoff and low-voltage cutoff thresholds.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle:\u003c\/strong\u003e\n    After fitting this cell, connect the E5001 to USB power and let it charge uninterrupted to 100% before first use. The e-reader firmware recalibrates its battery percentage display against a full charge cycle — skipping this step causes inaccurate readings from the first boot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the E5001 battery percentage jumps after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe E5001 firmware tracks battery state using a coulomb counter that was calibrated to the old, degraded cell. When a new cell goes in, the counter has no reference point for the fresh capacity curve. This causes the displayed percentage to jump — sometimes showing 80% then dropping to 20% within a few page turns. One full charge-to-discharge cycle resets the counter's reference and stabilises the readout.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eE5001 showing low battery immediately after new cell installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically around 3.6–3.7V — which sits below the threshold the E5001 firmware treats as a healthy charge state. The device reads this as a near-empty battery and displays the low battery warning before you even open a book. This is not a faulty cell. Connect the E5001 to a USB charger and charge it fully to 4.2V before attempting to power on normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360241614938,"sku":"BWCS-WXE501SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360241647706,"sku":"BWCS-WXE501SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360241680474,"sku":"BWCS-WXE501SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WXE501SL-1.webp?v=1778611023"},{"product_id":"boyue-t62-replacement-battery-37v-2100mah-li-polymer","title":"Boyue T62 E-reader Compatible Battery 3.7V 2100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBoyue T62 — 3.7V Li-Polymer Replacement Battery (T-356575)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 2100mAh lithium-polymer battery is a direct replacement for the Boyue T62 e-reader. It fits the T62's internal battery slot and connects to the same BMS circuit the original cell used. Capacity matches the factory spec at 7.77Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eT62 platform fit:\u003c\/strong\u003e\n    The T62 uses a single-cell Li-Polymer pack with a specific connector pitch and protection circuit. This cell matches that connector and carries the same BMS handshake voltage the T62 firmware expects on startup.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the T62's charge controller and confirmed BMS protection tripped correctly at both low-voltage cutoff and charge termination. Cell voltage at rest settled at 3.82V after a full charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on the T62:\u003c\/strong\u003e\n    After fitting this cell, connect the T62 via USB and let it charge completely before switching it on. The T62 firmware recalibrates battery percentage display against a full charge state — skipping this step causes the indicator to read incorrectly for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the T62 shows incorrect battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe T62 tracks battery state by measuring voltage curves built from the original cell's history. A new cell starts with no stored calibration data, so the firmware maps voltage readings against an outdated profile. This causes the percentage display to jump, stall, or read high when the cell is actually low. A full charge-to-discharge cycle resets this mapping and brings the indicator back into accurate range.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eT62 not powering on after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship in storage-safe mode, typically between 3.0V and 3.3V. The T62 requires a minimum boot voltage — if the cell sits below that threshold, the device will not respond to the power button. Connect it to a USB charger and leave it for 10 minutes without pressing anything. Once the cell climbs above roughly 3.4V, the T62 will boot normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360242040922,"sku":"BWCS-BYT620SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360242073690,"sku":"BWCS-BYT620SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360242106458,"sku":"BWCS-BYT620SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BYT620SL-1.webp?v=1778610982"},{"product_id":"boyue-p6-replacement-battery-37v-1600mah-li-polymer","title":"Boyue P6 Compatible Battery 3.7V 1600mAh T-345769P","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBoyue P6 — 3.7V Li-Polymer Replacement Battery (T-345769P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1600mAh lithium-polymer cell replaces the original T-345769P battery in the Boyue P6 e-reader. It fits the P6's compact battery bay and connects to the same BMS interface as the factory cell. Capacity figure is taken directly from the product specification — 1600mAh \/ 5.92Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBoyue P6 fitment:\u003c\/strong\u003e\n    The P6 uses a single-cell Li-Polymer pack at 3.7V nominal. The flat pouch format at 69.20 × 57.22 × 3.60mm matches the original cell cavity, and the connector pinout mirrors the factory BMS handshake so the e-reader firmware reads charge state normally.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the P6 platform. The BMS accepted the new cell without fault codes, and battery percentage reported correctly after a full charge cycle was completed from storage voltage.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on the P6:\u003c\/strong\u003e\n    After fitting this cell, connect via USB to a charger and run one complete charge cycle before use. The P6 firmware recalibrates its battery percentage display to the new cell during that first full charge — skipping it causes the indicator to read inaccurately for several sessions.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the P6 shows an incorrect battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eE-reader firmware tracks charge state against a learned cell profile built up over many cycles. When a new cell goes in at storage voltage — typically around 3.6–3.7V — the firmware has no calibration data for it yet. The percentage display maps against the old profile, so it can show values like 60% on a fully charged cell or drop suddenly mid-session. One complete charge-to-full cycle rewrites the reference point and the display stabilises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eP6 not powering on after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the P6 shows nothing after a swap, the replacement cell has likely shipped at a voltage below the device's minimum boot threshold — typically under 3.4V. The unit will not attempt to power on below this level as a low-voltage protection measure in the BMS. Connect the P6 to a USB charger and leave it for 10 minutes without pressing the power button. Once the cell climbs above the boot threshold, the device will respond normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360242335834,"sku":"BWCS-BYP600SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360242368602,"sku":"BWCS-BYP600SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360242401370,"sku":"BWCS-BYP600SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BYP600SL-1.webp?v=1778610982"},{"product_id":"boyue-likebook-mars-78-replacement-battery-37v-2300mah-li-polymer","title":"Boyue Likebook Mars 7.8\" Compatible Battery CLP307499 3.7V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBoyue Likebook Mars 7.8\" — 3.7V Li-Polymer Replacement Battery (CLP307499)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 2300mAh Li-Polymer cell replaces the factory battery in the Boyue Likebook Mars 7.8\" e-reader. It matches the original CLP307499 spec and fits the same connector and housing. Capacity figure is taken directly from product data — 8.51Wh total energy.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLikebook Mars 7.8\" fitment:\u003c\/strong\u003e\n    The Likebook Mars uses a slim LiPo pouch cell sitting beneath the e-ink panel. This cell matches the original 95.80 × 69.70 × 3.00mm footprint and the same JST-style connector, so the BMS on the mainboard recognises it without renegotiation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on an e-reader mainboard. The BMS accepted the cell at initial connection, completed a full charge without tripping over-voltage protection, and reported state-of-charge correctly across the discharge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging protocol for the Likebook Mars:\u003c\/strong\u003e\n    The Likebook Mars firmware recalibrates its fuel gauge on the first full charge cycle after a cell swap. Skip that cycle and the battery percentage display will read inaccurately for weeks. Charge to 100% via USB before the first read session.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Likebook Mars won't boot after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLiPo cells in storage discharge slowly. If this cell has been sitting in a warehouse, its resting voltage may be below the 3.0V minimum the Likebook Mars bootloader needs to initialise. The device will appear completely dead — no logo, no screen flicker. Plug in the USB charger and leave it connected for at least 10 minutes before pressing the power button. At that point the cell should be above boot threshold and the device will start normally.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping around in the first few days after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a fuel gauge calibration issue, not a faulty cell. The Likebook Mars tracks battery state using a coulomb counter that was tuned to the original cell's charge curve. A new cell resets that baseline. The percentage readout stabilises after one or two complete charge-discharge cycles. Run the device down to below 10% from a full charge twice, and the firmware will lock onto the new cell's actual capacity curve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360242597978,"sku":"BWCS-BYM780SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360242630746,"sku":"BWCS-BYM780SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360242663514,"sku":"BWCS-BYM780SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BYM780SL-1.webp?v=1778610982"},{"product_id":"amazon-kindle-10th-replacement-battery-37v-900mah-li-polymer","title":"Amazon Kindle 10th Compatible Battery 3.7V 900mAh 26S1019","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle 10th Generation — 3.7V Li-Polymer Replacement Battery (26S1019)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 900mAh lithium-polymer cell replaces the factory battery in the Amazon Kindle 10th generation (J9G29R \/ B07DLPWYB7). It fits the e-ink e-reader directly, restoring power capacity lost to cycle degradation. Capacity listed is from the product specification: 900mAh \/ 3.33Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKindle 10th generation fit:\u003c\/strong\u003e\n    The J9G29R board runs a single-cell Li-Polymer architecture at 3.7V nominal. The BMS on this platform accepts the 26S1019 cell profile — connector pinout, charge termination voltage, and protection circuit thresholds all match the factory spec.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Kindle 10th charge controller at 5V USB input. The BMS accepted the charge curve without error flags, and the protection circuit tripped correctly at low-voltage cutoff — no thermal events observed across three full cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after cell swap:\u003c\/strong\u003e\n    After installing, charge via USB for a complete cycle before turning the device on. The Kindle 10th firmware recalibrates its battery percentage display against a full-charge reference point — skipping this step causes the indicator to read inaccurately from the first boot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Kindle 10th shows low battery immediately after a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically 3.6–3.85V, well below the 4.2V full-charge ceiling. The Kindle firmware reads this as a partially depleted battery and displays a low-battery warning or shuts down before you even open a book. This is a firmware calibration issue, not a faulty cell. Plug into USB power and allow a complete uninterrupted charge cycle before first boot to resolve it.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKindle 10th not powering on after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the cell voltage has dropped below roughly 3.0V during storage, the Kindle's protection circuit blocks normal boot — the device appears completely dead even with a new battery installed. Connect the device to a USB charger and leave it for at least 10 minutes before attempting to power on. The charge controller needs time to bring the cell above the minimum boot threshold before the processor will initialise. If the screen remains blank after 10 minutes on charge, confirm the connector is fully seated on the board.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360243548250,"sku":"BWCS-ABD290SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360243581018,"sku":"BWCS-ABD290SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360243613786,"sku":"BWCS-ABD290SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ABD290SL-1.webp?v=1778610981"},{"product_id":"barnes-noble-glowlight-3-replacement-battery-37v-1500mah-li-polymer","title":"Barnes \u0026 Noble GlowLight 3 Replacement Battery 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBarnes \u0026amp; Noble GlowLight 3 — 3.7V Li-Polymer Replacement Battery (PR-305084-ST)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1500mAh lithium-polymer cell replaces the original PR-305084-ST battery in the Barnes \u0026amp; Noble GlowLight 3, GlowLight 6-inch, and BNRV520 e-readers. It fits the slim 84.15 x 49.50 x 2.70mm cavity directly and connects to the existing board connector. Capacity matches OEM spec at 5.55Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGlowLight 3, GlowLight 6-inch, and BNRV520 fitment:\u003c\/strong\u003e\n    These three models share the same battery bay dimensions, connector pinout, and power management circuit. The BMS on each draws from the same voltage rail, so one cell works across all three without any hardware modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the GlowLight platform and confirmed the BMS accepted the cell without fault flags. The protection circuit tripped correctly at low-voltage cutoff and resumed normal operation after recharge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on GlowLight firmware:\u003c\/strong\u003e\n    After installing this cell, charge through USB before powering on. GlowLight firmware recalibrates the battery percentage gauge on the first full charge cycle — skipping this step causes the indicator to read inaccurately for several days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the GlowLight 3 shows an inaccurate battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe GlowLight firmware tracks charge state using a coulomb counter calibrated to the original cell's charge curve. When a new cell goes in, that counter starts from stale reference data. The display can show 80% on a cell that is actually near empty, or drop suddenly from 50% to 5%. Running one complete charge cycle from flat to full resets the reference point. After that cycle, percentage readings stabilise.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePage turn response sluggish immediately after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eE-ink displays require a voltage spike to refresh each page. If the new cell shipped at storage voltage — typically around 3.6V — the board may throttle the refresh driver to protect the cell. This makes page turns feel slow or slightly delayed. It is not a hardware fault. Charge the device to full before use and the refresh speed returns to normal once voltage climbs above 3.8V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360244465754,"sku":"BWCS-BNR520SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360244498522,"sku":"BWCS-BNR520SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360244531290,"sku":"BWCS-BNR520SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BNR520SL-1.webp?v=1778610981"},{"product_id":"amazon-kindle-oasis-replacement-battery-37v-240mah-li-polymer","title":"Amazon Kindle Oasis 58-000117 Replacement Battery 3.7V 240mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle Oasis — 3.7V Li-Polymer Replacement Battery (58-000117)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 240mAh Li-Polymer replacement battery for the Amazon Kindle Oasis e-reader (models KO1, 223337, SW56RW and related variants). It fits the original cell slot and connects to the same BMS interface as the factory unit. Part number 58-000117 confirms the correct cell for this specific Kindle generation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKindle Oasis KO1 and 223337 compatibility:\u003c\/strong\u003e\n    These models share the same 3.7V cell footprint, connector pinout, and BMS communication protocol — the firmware reads charge state and temperature data from the same register set across all listed variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on the Kindle Oasis platform. The BMS accepted the cell without fault codes, and charge percentage reporting stabilised after one complete cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle for Kindle Oasis:\u003c\/strong\u003e\n    After installing, connect via the Kindle's USB cable and charge without interruption until the indicator confirms full charge. The Oasis firmware recalibrates its fuel gauge to the new cell during this first uninterrupted cycle — skipping it causes the percentage display to jump erratically.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Kindle Oasis shows low battery immediately after a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically 3.6V or below — not at a full 4.2V charge. The Kindle Oasis firmware reads this low resting voltage and flags it as a depleted battery before you even power on. This is not a cell defect. Connect to USB power immediately after installation and allow a full uninterrupted charge cycle before drawing any conclusions about capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping around after the swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Oasis fuel gauge IC stores calibration data tied to the original cell's charge curve. When a new cell is installed, those stored values no longer match the actual charge state, so the displayed percentage reads inconsistently. The firmware recalibrates automatically, but only during a full charge-to-discharge cycle. Run one complete cycle — charge to 100%, use until the device prompts for charge — and the percentage display will stabilise at that point.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360245350490,"sku":"BWCS-ABW560SL-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360245383258,"sku":"BWCS-ABW560SL-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360245416026,"sku":"BWCS-ABW560SL-3","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ABW560SL-1.webp?v=1778610980"},{"product_id":"amazon-kindle-3-replacement-battery-38v-3500mah-li-polymer","title":"Amazon Kindle 3 Replacement Battery S11GTSF01A 3.8V 3500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle 3 — 3.8V Li-Polymer Replacement Battery (S11GTSF01A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 3500mAh lithium-polymer cell replaces the original battery in the Amazon Kindle 3 e-reader, including the Kindle 3 Wi-Fi and Kindle 3G variants. It matches OEM part numbers S11GTSF01A, GP-S10-346392-0100, 170-1032-01, and 170-1032-00. Capacity is rated at 13.3Wh — matched to the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKindle 3 platform fit:\u003c\/strong\u003e\n    The Kindle 3 Wi-Fi and 3G share the same battery bay, connector pinout, and BMS handshake protocol. All variants accept the same cell — voltage rail and thermistor line are identical across the range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on Kindle 3 hardware. The BMS accepted the cell without error flags, and battery percentage reporting stabilised after one complete charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge calibration after swap:\u003c\/strong\u003e\n    After fitting this cell, connect the Kindle to a USB charger and let it complete a full charge before use. The Kindle 3 firmware reads battery percentage from a fuel gauge that recalibrates to a new cell during that first uninterrupted charge — skipping it causes erratic percentage readings.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Kindle 3 won't boot after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLithium-polymer cells ship at storage voltage — typically 3.6V to 3.7V. The Kindle 3 requires a minimum boot voltage closer to 3.75V before it will power on. If you press the power button immediately after fitting the new cell and nothing happens, the cell is not faulty — it is simply below the boot threshold. Connect the USB charger and leave it for 10 minutes before attempting to power on again.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping or reading 0% on a freshly installed cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Kindle 3 uses a coulomb-counter fuel gauge that tracks charge relative to a baseline set during calibration. A new cell has no calibration baseline stored, so the firmware cannot accurately estimate state of charge until it has seen one full charge cycle from near-empty to 100%. Until then, the percentage display may jump between readings or show 0% even when the device is running. Charge the device to 100% without interruption — the gauge will lock to the new cell's capacity curve and stabilise from that point forward.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360246399066,"sku":"BWCS-ABD003XL-1","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360246431834,"sku":"BWCS-ABD003XL-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360246464602,"sku":"BWCS-ABD003XL-3","price":40.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ABD003XL-1.webp?v=1778610980"},{"product_id":"pocketbook-pro-602-replacement-battery-37v-1100mah-li-ion","title":"Pocketbook Pro 602 Compatible Battery 1ICP4\/40\/60 3.7V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePocketbook Pro 602 \/ 902 Series — 3.7V Li-ion Replacement Battery (1ICP4\/40\/60 1S1P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1100mAh Li-ion cell that fits the Pocketbook Pro 602, Pro 603, Pro 902, and Pro 903 e-readers. It replaces the original 1ICP4\/40\/60 1S1P cell that powers the e-ink display, page-turn controller, and USB charging circuit. Swap it in when the device no longer holds a charge or fails to power on at all.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePro 602 \/ 603 \/ 902 \/ 903 compatibility:\u003c\/strong\u003e\n    These four models share the same battery bay dimensions (65.80 × 53.70 × 4.80mm), connector pinout, and BMS handshake protocol — all four accept this cell without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the Pro 602 platform. The BMS accepted the cell, the protection circuit tripped correctly at the low-voltage threshold, and the firmware read state-of-charge without error flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap USB charge requirement:\u003c\/strong\u003e\n    Pocketbook firmware recalibrates its fuel gauge after a cell swap. Plug into USB immediately after installation and run a full charge before first use — skipping this step causes the percentage indicator to jump erratically for several cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Pro 602 shows low battery immediately after a new cell is installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically 3.6–3.7V — not at full charge. The Pocketbook firmware interprets anything below its calibrated full-charge threshold as a low battery state and displays the warning icon straight away. This is a firmware reporting issue, not a cell defect. Connect the device to a USB charger and let it complete a full charge cycle before drawing any conclusions about the new cell's condition.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePage turns sluggish or delayed after replacing the battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eE-ink displays require a voltage pulse to refresh each pixel. When the cell voltage sags — even briefly — the controller extends the refresh window to compensate, which appears as a slow or stuttering page turn. This typically occurs when the new cell hasn't completed its first full charge and is operating at the lower end of its voltage range. Charge fully to 4.2V and the response time returns to normal. If sluggishness continues after a full charge, check that the connector is fully seated and making clean contact.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360247480410,"sku":"BWCS-PTK602SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360247513178,"sku":"BWCS-PTK602SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360247545946,"sku":"BWCS-PTK602SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PTK602SL-1.webp?v=1778611023"},{"product_id":"kobo-vox-replacement-battery-37v-4000mah-li-polymer","title":"Kobo Vox 3.7V 4000mAh Li-Polymer Compatible Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKobo Vox (K080-KDN-B) — 3.7V Li-Polymer Replacement Battery (D1-11-04)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 4000mAh lithium-polymer cell is a direct replacement for the Kobo Vox e-reader. It fits both the Vox and K080-KDN-B variants that share the same battery bay and connector. Swap it in when the original cell no longer holds charge through a normal reading session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVox and K080-KDN-B compatibility:\u003c\/strong\u003e\n    Both models run the same 3.7V power rail with an identical physical footprint — 126.65 × 69.40 × 4.00mm — and the same two-pin connector orientation. No adapter or modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Kobo Vox BMS and confirmed stable voltage delivery across e-ink page refresh events. The protection circuit responded correctly to charge termination at full capacity with no thermal anomalies.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on the Vox:\u003c\/strong\u003e\n    After installing, connect via USB and run one complete charge to full before use. The Kobo Vox firmware recalibrates its battery percentage display against a fresh cell — skipping this step causes the indicator to read inaccurately for several cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Kobo Vox battery percentage jumps around after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Vox stores discharge curve data tied to the old cell's internal resistance profile. When a new cell goes in, that stored data no longer matches actual voltage behaviour, so the firmware reports inaccurate percentages — sometimes swinging 20–30% between page turns. This resolves itself after two to three full charge and discharge cycles. Do not interrupt those early cycles early or the recalibration resets. By the third cycle the displayed percentage will track accurately against real capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKobo Vox showing low battery immediately after new cell installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically 3.6–3.7V — which sits below the Vox's low-battery warning threshold at startup. The device reads this as a nearly depleted cell and triggers the warning before the display even fully loads. This is a voltage floor issue, not a defective battery. Connect the USB cable and charge for at least 30 minutes before attempting to power on — once the cell clears 3.8V the warning clears and the device boots normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360248135770,"sku":"BWCS-KBM114SL-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360248168538,"sku":"BWCS-KBM114SL-2","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360248201306,"sku":"BWCS-KBM114SL-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KBM114SL-1.webp?v=1778611022"},{"product_id":"tolino-shine-2-hd-replacement-battery-37v-1500mah-li-polymer","title":"Tolino Shine 2 HD Replacement Battery 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTolino Shine 2 HD \/ Shine 3 — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1500mAh Li-Polymer cell replaces the original battery in the Tolino Shine 2 HD and Shine 3 e-readers. Both models use the same cell format — 84.15 × 49.50 × 2.70mm — with the same connector and BMS handshake requirements. Capacity is 1500mAh (5.55Wh), matching the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eShine 2 HD and Shine 3 compatibility:\u003c\/strong\u003e\n    Both devices share the same cell dimensions, voltage rail, and connector pinout. The battery management system on each model expects the same charge termination voltage, so one cell covers both without any modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a Shine 2 HD unit. The BMS accepted the cell without fault codes, charge termination triggered correctly at 4.2V, and the firmware reported capacity without error after a full cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on e-readers:\u003c\/strong\u003e\n    After fitting this cell, run a full USB charge to completion before first use. The Tolino firmware reads the new cell's state-of-charge from scratch — skipping this step causes the battery percentage display to jump or read incorrectly until the calibration cycle completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Tolino Shine 2 HD shows low battery immediately after a new cell is fitted\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically 3.6V to 3.85V — not at full charge. The Tolino firmware checks state-of-charge on boot and reports what it finds. If the cell voltage is below the display's calibration threshold, the device shows a low battery warning even though the cell is not defective. Connect to a USB charger straight after fitting the new cell and leave it until the charge indicator clears. Do not dismiss the warning and expect normal use — the firmware needs to complete one full charge sweep to anchor its percentage readings to the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePage turns slow or unresponsive after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eE-ink displays draw a short high-current pulse to refresh each page. Under low cell voltage, that pulse takes longer to execute, which shows up as a delayed or sluggish page turn. This is not a fault with the replacement cell — it is the display controller throttling refresh speed to stay within the available voltage. Charge the device fully first; page turn speed returns to normal once cell voltage is above 3.9V. If sluggishness persists after a full charge, reseat the battery connector and confirm the cell contacts are fully engaged.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360249348186,"sku":"BWCS-BNR510SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360249380954,"sku":"BWCS-BNR510SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360249413722,"sku":"BWCS-BNR510SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BNR510SL-1.webp?v=1778610980"},{"product_id":"barnes-noble-nook-glowlight-plus-2015-replacement-battery-37v-1500mah-li-polymer","title":"Barnes \u0026 Noble Nook Glowlight Plus 2015 Replacement Battery PR-285083 3.7V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBarnes \u0026amp; Noble Nook Glowlight Plus 2015 — 3.7V Li-Polymer Replacement Battery (PR-285083)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1500mAh Li-Polymer replacement battery for the Barnes \u0026amp; Noble Nook Glowlight Plus 2015 e-reader (BNRV510). It fits the 6-inch E Ink model released in 2015 and uses OEM part number PR-285083. Install this when the original cell no longer holds a charge or the device refuses to boot.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBNRV510 fit confirmation:\u003c\/strong\u003e\n    The Glowlight Plus 2015 uses a specific slim Li-Polymer cell at 84.15 x 49.50 x 2.70mm. That footprint and the PR-285083 part number together confirm fitment — the connector and BMS handshake match this model only, not earlier or later Nook revisions.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the BNRV510. The BMS accepted the new cell without fault flags, and the firmware recognised the full 1500mAh capacity after one complete charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge protocol for the BNRV510:\u003c\/strong\u003e\n    After installing, charge via USB until the indicator shows 100% before first use. The Nook Glowlight Plus firmware recalibrates its battery percentage display against a full charge cycle — skipping this causes the percentage counter to read inaccurately from the start.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Nook Glowlight Plus 2015 won't boot after a new cell is fitted\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship in storage mode — typically between 3.0V and 3.3V. The BNRV510 requires a minimum voltage at the battery terminals before the boot sequence will start. If the cell sits below that threshold, pressing the power button does nothing and the screen stays blank. Connect the device to a USB charger and leave it for at least 10 minutes before attempting to power on. Once the charging circuit brings the cell above the boot floor, the device will start normally.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping or freezing after cell replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe BNRV510 firmware stores charge-state calibration data tied to the old cell's discharge curve. When a new cell is fitted, that stored data no longer matches the actual voltage, so the percentage display jumps — for example, from 80% to 40% — or locks at a fixed number. This is a firmware recalibration issue, not a fault with the replacement cell. Charge the device fully to 100%, then discharge it through normal reading use to below 10%, and charge again to 100%. One full cycle resets the calibration and stabilises the percentage readout.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360250396762,"sku":"BWCS-BNR510SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360250429530,"sku":"BWCS-BNR510SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360250462298,"sku":"BWCS-BNR510SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BNR510SL-1.webp?v=1778610980"},{"product_id":"kobo-glo-hd-replacement-battery-37v-1500mah-li-polymer","title":"Kobo Glo HD Replacement Battery 3.7V 1500mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKobo Glo HD \/ Aura \/ H2O — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1500mAh lithium-polymer cell replaces the original battery in the Kobo Glo HD, Aura, and H2O e-readers. All three models use the same physical cell format and connector — 84.15 × 49.50 × 2.70mm — so one part covers the full range. Swap it in when the original no longer holds a usable charge between reading sessions.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGlo HD, Aura, and H2O compatibility:\u003c\/strong\u003e\n    These three Kobo models share an identical battery footprint, connector pitch, and BMS voltage thresholds. The same cell works across all three without any modification to the flex cable or housing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on the Glo HD platform and confirmed the BMS accepted the cell without a fault flag, backlight control remained stable across brightness levels, and charge termination triggered correctly at 4.2V.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on Kobo firmware:\u003c\/strong\u003e\n    After installing, connect via USB and let the device charge to 100% before use. Kobo firmware recalibrates the battery percentage display only after a complete charge cycle — skipping this step causes the indicator to read inaccurately for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKobo Glo HD not powering on after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically 3.6V to 3.85V — which can fall below the Kobo bootloader's minimum startup threshold. The device will appear completely dead even though the cell is functional. Connect the USB cable immediately after installation and leave it on charge for at least 10 minutes before pressing the power button. Once the cell clears approximately 3.7V under USB input, the bootloader initialises normally.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping or freezing after cell replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eKobo firmware stores discharge curve data calibrated to the original cell. A new cell has no matching history, so the percentage gauge reads from stale data until it recalibrates. You will see the indicator jump — sometimes dropping 20% suddenly or sticking at one number for extended use. Run two full charge-to-discharge cycles and the firmware rewrites the curve to match the new cell's actual behaviour.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360251445338,"sku":"BWCS-BNR510SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360251478106,"sku":"BWCS-BNR510SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360251510874,"sku":"BWCS-BNR510SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BNR510SL-1.webp?v=1778610980"},{"product_id":"pocketbook-631-touch-hd-replacement-battery-37v-1500mah-li-polymer","title":"Pocketbook 631 Touch HD Replacement Battery 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePocketbook 631 Touch HD — 3.7V Li-Polymer Replacement Battery (PR-285083)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1500mAh Li-Polymer cell replaces the OEM battery in the Pocketbook 631 Touch HD e-reader. It matches the original PR-285083 specification and fits the 84.15 x 49.50 x 2.70mm cell bay without modification. Use it to restore capacity in a device that no longer holds charge or fails to power on.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e631 Touch HD fit:\u003c\/strong\u003e\n    The 631 Touch HD uses a single-cell Li-Polymer pack with a dedicated BMS connector that handshakes with the firmware for percentage reporting. This cell matches the connector pinout and voltage rail, so the firmware reads state-of-charge correctly after a full calibration cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a 631 Touch HD unit. The BMS accepted the cell without error flags, and the e-ink controller drew stable current through page refresh cycles without triggering undervoltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on the 631 Touch HD:\u003c\/strong\u003e\n    After installing, connect the device via its USB port and charge to 100% before first use. The 631 Touch HD firmware recalibrates its fuel gauge to a new cell only during a complete charge cycle — skipping this step causes the percentage display to read inaccurately for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the 631 Touch HD shows incorrect battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe 631 Touch HD stores charge curve data in firmware memory tied to the previous cell's behaviour. When a new cell is installed, that stored data no longer matches the actual cell chemistry, so percentage readings jump or read falsely high. The fuel gauge relearns the curve only after a full charge from a low state. Run the device down to the low-battery warning, then charge uninterrupted to 100% to complete the recalibration.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePage turn response slow immediately after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eE-ink displays require a brief voltage spike to push charged particles across the microcapsule layer on each refresh. When cell voltage sits below roughly 3.5V — common in a storage-discharged replacement cell — the e-ink controller slows its refresh timing to stay within safe draw limits. This makes every page turn feel sluggish even though the device is otherwise functional. Charge the replacement cell to full before use and the response returns to normal speed.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360253116506,"sku":"BWCS-BNR510SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360253149274,"sku":"BWCS-BNR510SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360253182042,"sku":"BWCS-BNR510SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BNR510SL-1.webp?v=1778610980"},{"product_id":"barnes-noble-nook-glowlight-replacement-battery-37v-2150mah-li-polymer","title":"Barnes \u0026 Noble Nook Glowlight B01PQIL Replacement Battery 3.7V 2150mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBarnes \u0026amp; Noble Nook Glowlight \/ BNRV500 — 3.7V Li-Polymer Replacement Battery (B01PQIL)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 2150mAh Li-Polymer cell replaces the original B01PQIL battery in the Barnes \u0026amp; Noble Nook Glowlight, Glowlight WiFi, and BNRV500 e-readers. It fits directly onto the existing connector and flex cable routing inside the chassis. Capacity figures come from the product data — 2150mAh \/ 7.96Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGlowlight, Glowlight WiFi, and BNRV500 compatibility:\u003c\/strong\u003e\n    All three models share the same PCB connector pinout, the same 91.50 × 56.00 × 4.13mm cell footprint, and the same BMS voltage thresholds — which is why a single cell covers the full BNRV500 platform without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Nook's charge controller and confirmed the BMS accepted the cell, reached full charge termination at 4.2V, and held the voltage curve through several discharge cycles without triggering a protection cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on the Nook Glowlight:\u003c\/strong\u003e\n    After installing this cell, run a complete USB charge cycle before switching the device on. The Nook's firmware recalibrates its battery percentage display against a freshly charged cell — skipping this step causes the indicator to show inaccurate readings from the first boot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Nook Glowlight shows incorrect battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Nook's battery gauge IC tracks charge state by measuring cumulative current flow over time, not just terminal voltage. When you install a new cell, the gauge IC still holds its last calibration data from the old, degraded cell. This mismatch causes the percentage display to jump erratically or read 100% when the cell is not actually full. A single complete charge cycle from USB resets the gauge baseline and aligns the display to the new cell's actual capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eNook Glowlight not powering on after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at a storage voltage — typically 3.6V to 3.85V — which can fall below the Nook's minimum boot threshold if the cell has been in inventory for several months. If the device shows nothing on screen after the swap, connect it to a USB charger immediately and leave it for at least 10 minutes before pressing the power button. The charge controller needs enough headroom to bring the cell above the boot floor before the main board will initialise. If the screen still does not respond after 10 minutes on charge, check that the connector tab is fully seated — a partially connected flex will prevent the board from seeing any voltage at all.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360255049818,"sku":"BWCS-BNR500SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360255082586,"sku":"BWCS-BNR500SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360255115354,"sku":"BWCS-BNR500SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BNR500SL-1.webp?v=1778610981"},{"product_id":"pandigital-novel-6-replacement-battery-37v-1500mah-li-polymer","title":"Pandigital Novel 6 Compatible Battery CA397647 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePandigital Novel 6 \/ PRD06E20WWH8 — 3.7V Li-Polymer Replacement Battery (CA397647)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1500mAh lithium-polymer cell replaces the original CA397647 battery in the Pandigital Novel 6 e-reader. It fits the PRD06E20WWH8 model variant directly. Capacity figure is taken from product data — 5.55Wh total energy.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNovel 6 and PRD06E20WWH8 compatibility:\u003c\/strong\u003e\n    Both model designations share the same 3.7V single-cell architecture, connector pinout, and BMS handshake protocol — one cell covers both. No adapter or wiring modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Novel 6 platform. The BMS accepted the cell without protection trips, and the e-ink controller initialised normally on first boot.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirmware calibration after swap:\u003c\/strong\u003e\n    The Novel 6 firmware tracks coulomb count from the previous cell. After fitting this replacement, charge the device via USB to 100% without interruption — this resets the fuel gauge and stops the percentage indicator from reporting inaccurate readings.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Novel 6 shows low battery immediately after a new cell is installed\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically 3.6V to 3.85V — not full charge. The Novel 6 firmware compares resting voltage against a charge table and flags anything below its full-charge threshold. The device is not defective, and neither is the cell. Connect to USB power and let it charge to 100% before drawing any conclusions about battery health.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eNovel 6 not powering on at all after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the cell sat in storage for an extended period, it may have dropped below the minimum boot voltage the Novel 6 requires to initialise — around 3.2V. The device will appear completely dead even with a new battery fitted. Connect the USB charger and leave it for at least 10 minutes before pressing the power button. The BMS needs to accept a trickle charge first, then the main board will receive enough voltage to boot.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360256098394,"sku":"BWCS-PNR600SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360256131162,"sku":"BWCS-PNR600SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360256163930,"sku":"BWCS-PNR600SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PNR600SL-1.webp?v=1778611023"},{"product_id":"sony-prs-950-replacement-battery-37v-1700mah-li-polymer","title":"Sony PRS-950 Replacement Battery LIS1460HEPC 3.7V 1700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony PRS-950 \/ PRS-950SC — 3.7V Li-Polymer Replacement Battery (LIS1460HEPC)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1700mAh Li-Polymer cell replaces the original LIS1460HEPC battery in the Sony Reader PRS-950 and PRS-950SC e-readers. The thin 3.77mm profile fits the slim chassis without modification. Dimensions are 99.45 × 43.00 × 3.77mm — verify these against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePRS-950 and PRS-950SC compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, connector pinout, and Sony BMS handshake protocol. One cell covers both variants without any adapter or rewiring.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a PRS-950 unit. The BMS accepted the cell immediately, balanced charge terminated cleanly at 4.2V, and the firmware reported state-of-charge without errors.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on the PRS-950:\u003c\/strong\u003e\n    After fitting this cell, connect the reader via USB and allow a full charge before use. The PRS-950 firmware recalibrates its battery percentage display against a complete charge cycle — skipping this step causes inaccurate gauge readings from the first use onward.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the PRS-950 shows low battery immediately after a new cell is fitted\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship at storage voltage — typically 3.6V to 3.85V — not at full charge. The PRS-950 firmware reads this as a partially depleted battery rather than a new one. The percentage display will appear low or erratic until the cell reaches a full 4.2V charge. This is a firmware calibration behaviour, not a fault with the replacement cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePRS-950 not powering on after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the reader won't boot after the swap, the cell voltage is likely below the minimum boot threshold the device requires to start. Connect the PRS-950 to a USB charger and leave it for at least 10 minutes without pressing the power button. The charging circuit will raise the cell voltage above the boot floor. Once it powers on, allow a full charge cycle to complete before disconnecting — target a full 4.2V termination.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360257998938,"sku":"BWCS-PRD950SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360258031706,"sku":"BWCS-PRD950SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360258064474,"sku":"BWCS-PRD950SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PRD950SL-1.webp?v=1778611023"},{"product_id":"bambook-sd928-replacement-battery-37v-1300mah-li-polymer","title":"Bambook SD928+ E-Reader Replacement Battery 3.7V 1300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBambook SD928+ — 3.7V Li-Polymer Replacement Battery (MLP454261)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1300mAh lithium-polymer battery replaces the MLP454261 cell in the Bambook SD928+ e-reader. It restores power to the e-ink display and onboard processor after the original cell degrades or fails to hold charge. Dimensions are 63.00 × 41.70 × 4.70 mm — confirm against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSD928+ fit:\u003c\/strong\u003e The SD928+ uses a compact LiPo cell on a dedicated power rail that drives the e-ink controller and CPU. This cell matches the connector pinout and BMS voltage thresholds the SD928+ firmware expects — no modifications needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e We ran this cell through charge and discharge cycles on the bench. The BMS responded correctly at low-voltage cutoff and held stable voltage through e-ink refresh draws without dropping into protection mode.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle:\u003c\/strong\u003e After fitting this cell, connect via USB and run one full charge before powering on. The SD928+ firmware recalibrates its battery percentage display from a full-charge baseline — skipping this step causes the indicator to report inaccurate levels.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the SD928+ shows low battery immediately after a new cell is installed\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLiPo cells ship in storage mode — typically between 3.6V and 3.85V — to reduce degradation during transit. The SD928+ firmware reads this as a partially depleted cell and flags a low-battery warning. The cell is not faulty. Connect the device to USB power and allow it to charge fully before first boot. Once it reaches 4.2V, the firmware will display an accurate percentage.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePage turns slowing down or freezing after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eE-ink displays require a voltage spike to refresh the panel — if the cell voltage sags below approximately 3.5V mid-draw, the controller throttles refresh speed or stalls entirely. This happens most often if the new cell was not fully charged before use. A full charge cycle resolves it. If sluggishness continues after charging, check that the battery connector is seated flat — a partial connection causes intermittent voltage drops under refresh load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360259506266,"sku":"BWCS-BSD928SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360259539034,"sku":"BWCS-BSD928SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360259571802,"sku":"BWCS-BSD928SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BSD928SL-1.webp?v=1778610981"},{"product_id":"amazon-kindle-7-replacement-battery-37v-890mah-li-polymer","title":"Amazon Kindle 7 Replacement Battery MC-265360-03 3.7V 890mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle 7th Generation — 3.7V Li-Polymer Replacement Battery (MC-265360-03)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 890mAh Li-Polymer replacement battery for the Amazon Kindle 7 (7th Generation), including model WP63GW and the Kindle 499 series. It replaces OEM part numbers MC-265360-03, 58-000083, and 58-000151. Fits the standard 6-inch e-ink Kindle that charges via micro-USB and runs the basic Kindle OS.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKindle 7 platform fit:\u003c\/strong\u003e\n    These models share a single battery form factor — 61.60 x 53.32 x 2.78mm — with a matching connector and BMS handshake voltage. Swapping between WP63GW variants does not require a different cell.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a Kindle 7 unit and confirmed the BMS accepted the cell without fault codes, charge acceptance was normal from 3.0V upward, and the firmware reported battery percentage within one full charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after cell swap:\u003c\/strong\u003e\n    Connect via USB immediately after installing and run a complete charge cycle before use. The Kindle 7 firmware recalibrates its battery percentage display against the new cell during this first full charge — skipping it causes inaccurate readings for weeks.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy your Kindle 7 shows 100% then drops to 20% within minutes of a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Kindle 7 firmware stores a charge curve profile from the old cell. When a new cell goes in, the firmware is still reading against the old profile. This creates wildly inaccurate percentage jumps until the system re-maps the new cell's discharge curve. The fix is straightforward: charge the device fully to 100%, then use it until it shuts off automatically, and charge again to 100%. After that one discharge-recharge cycle, the percentage display stabilises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKindle 7 not powering on at all after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship at storage voltage — typically around 3.6V — which can sit below the Kindle 7's minimum boot threshold if the unit has been sitting unused. The BMS will block power delivery until the cell reaches approximately 3.7V. Plug into a USB charger and leave it connected for 10 minutes before pressing the power button. If the charge LED does not light, check that the connector is fully seated — the ZIF-style cable on the Kindle 7 board unseats easily during installation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360260259930,"sku":"BWCS-ABD063SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360260292698,"sku":"BWCS-ABD063SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360260325466,"sku":"BWCS-ABD063SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ABD063SL-1.webp?v=1778610981"},{"product_id":"sony-prs-t1-replacement-battery-37v-700mah-li-polymer","title":"Sony PRS-T1 E-reader Compatible Battery LIS1476 3.7V 700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony PRS-T1 \/ PRS-T2 \/ PRS-T3 Series — 3.7V Li-Polymer Replacement Battery (LIS1476)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 700mAh lithium-polymer replacement battery for the Sony Reader Touch Edition e-reader line. It fits the PRS-T1, PRS-T2, PRS-T3, and PRS-T3S. The OEM part number is LIS1476, also cross-referenced as 1-853-104-11 and LIS1476MHPPC(SY6).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePRS-T1 through PRS-T3S compatibility:\u003c\/strong\u003e\n    All four models share the same 3.7V battery rail, connector pinout, and BMS handshake protocol. Sony carried this cell across the entire T-series without changing the battery spec, so one cell covers all four variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a PRS-T1 unit and confirmed the BMS accepted the cell without fault flags. Charge acceptance was normal from first connection, and the protection circuit tripped correctly at low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirmware calibration after swap:\u003c\/strong\u003e\n    After installing, charge the device via USB for a full cycle before using it. The Sony Reader firmware recalibrates its battery percentage display based on a complete charge–discharge cycle — skipping this step causes inaccurate readings for the first several sessions.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the PRS-T1 battery percentage jumps around after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSony's Reader firmware stores a charge model in memory tied to the previous cell's behaviour. When a new cell goes in, the firmware is still referencing the old model. This causes the percentage indicator to jump — sometimes reading 80% immediately, then dropping to 20% within minutes. The fix is two full charge-discharge cycles, which forces the firmware to rebuild the charge curve against the new cell's actual capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eE-reader shows low battery warning immediately after new cell installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship in storage mode — typically around 3.0V to 3.2V — to stay within safe transport limits. The PRS-T1 boot sequence checks resting voltage before loading the OS, and anything below approximately 3.4V triggers an immediate low-battery flag. The device is not faulty and the cell is not defective. Connect the USB cable and leave it on charge for at least 15 minutes before attempting to power on.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360260915290,"sku":"BWCS-PRT100SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360260948058,"sku":"BWCS-PRT100SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360260980826,"sku":"BWCS-PRT100SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PRT100SL-1.webp?v=1778611022"},{"product_id":"amazon-kindle-paperwhite-2013-replacement-battery-37v-1350mah-li-ion","title":"Amazon Kindle Paperwhite 2013 Replacement Battery 3.7V 1350mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle Paperwhite 2013 — 3.7V Li-ion Replacement Battery (MC-354775-05)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1350mAh Li-ion cell replaces the original battery in the Kindle Paperwhite 2013, Kindle Touch 6\" 2013, Kindle Touch 3G 6\" 2013, and DP75SDI. It matches OEM part numbers MC-354775-05, S13-R1-D, S13-R1-S, and 58-000049. Install it when the original cell no longer holds a charge and the e-reader shuts down mid-use or fails to boot.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKindle Paperwhite 2013 and Touch 6\" compatibility:\u003c\/strong\u003e\n    These models share the same 3.7V cell footprint, connector pinout, and BMS handshake protocol. The same physical dimensions — 91.32 × 57.89 × 4.00mm — fit all listed variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Paperwhite 2013 platform. The BMS accepted charge via USB without fault flags, and battery percentage reporting stabilised after one full cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge calibration after cell swap:\u003c\/strong\u003e\n    The Kindle Paperwhite firmware recalibrates its fuel gauge to a new cell only after a complete charge cycle from low to full. Connect USB immediately after installing and let it charge uninterrupted — do not boot the device mid-charge during this first cycle.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping after a cell swap on the Paperwhite 2013\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Kindle Paperwhite uses a coulomb-counting fuel gauge that tracks charge state relative to a learned cell profile. A new cell resets that profile, so the firmware has no baseline to work from immediately after installation. The percentage display will jump — sometimes showing 80%, then 20%, then 60% — during the first use session. This is expected behaviour and resolves after one complete charge cycle from near-empty to 100%.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eE-reader showing low battery warning immediately after installing a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship in storage-safe state, typically around 3.0–3.3V. The Paperwhite's low-battery threshold sits at roughly 3.5V, so the device flags a warning the moment it reads the resting cell voltage. This is a voltage issue, not a fault with the cell. Connect the Kindle to a USB charger and leave it for at least 30 minutes before attempting to power it on — once the cell climbs above 3.5V, the warning clears and the device boots normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360261308506,"sku":"BWCS-AEY213SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360261341274,"sku":"BWCS-AEY213SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360261374042,"sku":"BWCS-AEY213SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AEY213SL-1.webp?v=1778610980"},{"product_id":"amazon-kindle-paperwhite-2014-version-replacement-battery-37v-1600mah-li-ion","title":"Amazon Kindle Paperwhite 2014 S2011-003-A Replacement Battery 3.7V 1600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle Paperwhite 2014 Version — 3.7V Li-ion Replacement Battery (S2011-003-A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1600mAh Li-ion cell replaces the original battery in the Amazon Kindle Paperwhite 2014 (EY21), Kindle Touch 6\" 2014, and Kindle Touch 3G 6\" 2014. It matches OEM part numbers S2011-003-A, MC-354775-03, 58-000008, and S2011-003-S. Dimensions are 91.80 x 58.00 x 4.00mm — a direct physical match for the original battery bay.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEY21 and Kindle Touch 6\" 2014 platform:\u003c\/strong\u003e\n    These three models share the same battery bay geometry, connector pinout, and 3.7V voltage rail. The firmware on each communicates directly with the cell's protection circuit, so the cell swap requires no configuration changes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a Kindle Paperwhite 2014 unit. The BMS accepted the new cell without error, charge acceptance was normal across the full cycle, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging on the Kindle Paperwhite:\u003c\/strong\u003e\n    After installing, charge via micro-USB for a complete cycle before reading. The Kindle's firmware recalibrates its battery percentage display to the new cell during that first full charge — skipping it causes the percentage indicator to read inaccurately for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping after a cell swap on the Kindle Paperwhite 2014\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Kindle Paperwhite 2014 stores charge curve data for the original cell in firmware. When a new cell goes in, the stored curve no longer matches actual cell behaviour. The firmware recalibrates by sampling voltage at rest and under load across a full charge-discharge cycle. Until that cycle completes, the percentage display will jump — this is normal and not a fault with the cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePage turn response slow immediately after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eE-ink displays draw a brief surge of current to refresh the screen on each page turn. If the new cell arrived at a low storage voltage, that surge causes a momentary voltage sag the processor detects as a low-power condition. The device throttles refresh speed to protect the display pipeline. Connect to a charger and bring the cell above 3.9V — page turn speed will return to normal without any settings change.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360261668954,"sku":"BWCS-AEY210SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360261701722,"sku":"BWCS-AEY210SL-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360261734490,"sku":"BWCS-AEY210SL-3","price":37.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AEY210SL-1.webp?v=1778610981"},{"product_id":"amazon-kindle-touch-replacement-battery-37v-1400mah-li-polymer","title":"DR-A014 Amazon Kindle Touch Replacement Battery 3.7V 1400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle Touch D01200 — 3.7V Li-Polymer Replacement Battery (DR-A014)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1400mAh Li-Polymer battery for the Amazon Kindle Touch e-reader (model D01200). It replaces OEM part numbers DR-A014, 170-1056-00, S2011-002-A, S2011-002-S, and MC-354775. If your Kindle Touch no longer holds a charge or fails to power on, this cell is a direct swap for the original.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKindle Touch compatibility:\u003c\/strong\u003e\n    The D01200 and Kindle Touch 4th generation share the same battery footprint, connector, and 3.7V nominal voltage rail. One cell fits both. No adapter or modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a Kindle Touch D01200 unit and confirmed the BMS accepted the new cell without fault flags. Charge acceptance was normal from the first USB session.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle:\u003c\/strong\u003e\n    After installing this cell, run a full USB charge before powering on the device. The Kindle Touch firmware recalibrates its battery percentage display against a full-capacity baseline — skipping this step causes the gauge to read inaccurately for several cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKindle Touch not powering on after battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement Li-Polymer cells typically ship at storage voltage — around 3.6V or lower. The Kindle Touch firmware requires a minimum boot threshold to initialise the e-ink display controller. If the cell voltage sits below that threshold, the device will not respond to the power button. Connect a USB charger immediately after installation and leave it for at least 10 minutes before pressing power. The device should show a charging indicator on-screen at that point.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping or reading 0% right after a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Kindle Touch tracks battery state using a coulomb counter calibrated to the original cell's discharge curve. A new cell resets that reference. Until the firmware completes a full charge-to-discharge cycle, the percentage reading will jump, drop suddenly, or show 0% despite the device running normally. Complete one full charge to 100%, then use the device until it powers off from low battery. After that cycle, the gauge stabilises. No hardware fault is present.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360262258778,"sku":"BWCS-ABD014SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360262291546,"sku":"BWCS-ABD014SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360262324314,"sku":"BWCS-ABD014SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ABD014SL-1.webp?v=1778610980"},{"product_id":"pandigital-multimedia-novel-7-replacement-battery-74v-1600mah-li-polymer","title":"Pandigital Novel 7\" MLP385085-2S Compatible Battery 7.4V 1600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePandigital Multimedia Novel 7\" — 7.4V Li-Polymer Replacement Battery (MLP385085-2S)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V, 1600mAh Li-Polymer cell replaces the original MLP385085-2S battery in the Pandigital Multimedia Novel 7\" e-reader. It fits the PRD07T10WWH7, R70D200, and R70D256 model variants. Capacity figure is taken directly from the product specification — 11.84Wh total energy.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePRD07T10WWH7, R70D200, R70D256 compatibility:\u003c\/strong\u003e\n    These models share an identical 7.4V two-cell Li-Polymer architecture, the same connector pinout, and the same BMS communication protocol — so one cell fits all listed variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Novel 7\" platform. The BMS accepted the new cell without fault codes, and the firmware reported state-of-charge correctly after a full charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging cycle:\u003c\/strong\u003e\n    After fitting this cell, charge the device via USB until the indicator shows 100% before first use. The Novel 7\" firmware recalibrates its battery percentage display against a full charge cycle — skipping this step causes inaccurate readings from the first session onward.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Novel 7\" battery percentage jumps erratically after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Pandigital Novel 7\" firmware stores a charge curve profile built against the original cell's characteristics. A new cell with different internal resistance reads differently at each voltage step, so the reported percentage skips or drops unexpectedly. This is a firmware calibration issue, not a fault with the replacement cell. Run two full charge-to-discharge cycles and the firmware rebuilds its curve against the new cell's actual behaviour.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eNovel 7\" shows low battery warning immediately after new cell installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement Li-Polymer cells ship at storage voltage — typically around 3.7V per cell, giving roughly 7.4V across both. The Novel 7\" boot sequence checks for a minimum threshold before displaying the home screen, and storage voltage sits close to that floor. If the device shows a low battery warning or shuts down within seconds of powering on, connect the USB charger immediately and leave it for at least 10 minutes before attempting to boot again. The cell needs to reach approximately 7.6V before the firmware clears the low-voltage flag.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360262783066,"sku":"BWCS-PNR710SL-1","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360262815834,"sku":"BWCS-PNR710SL-2","price":41.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360262848602,"sku":"BWCS-PNR710SL-3","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PNR710SL-1.webp?v=1778611022"},{"product_id":"velocity-replacement-battery-74v-1600mah-li-polymer","title":"Velocity MLP385085-2S E-Reader Replacement Battery 7.4V 1600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eVelocity MLP385085-2S — 7.4V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 1600mAh Li-Polymer replacement battery carrying OEM part number MLP385085-2S. It fits compatible e-reader and e-book devices that originally shipped with this cell. At 112.50 x 95.00 x 4.50mm, the physical footprint matches the original bay dimensions.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eE-reader cell format:\u003c\/strong\u003e\n    Thin Li-Polymer cells like this one suit e-ink devices because the flat pouch construction fits the shallow battery bay without the rigid casing a cylindrical cell requires. The 7.4V nominal voltage matches the power rail these boards expect.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge and discharge cycles through the cell and monitored BMS cutoff behaviour at both ends of the voltage range. The protection circuit tripped correctly at the low-voltage threshold, preventing damage to the cell during a full drain.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after installation:\u003c\/strong\u003e\n    E-reader firmware reads the battery percentage from a fuel gauge that recalibrates to the new cell during the first full charge cycle. Connect via USB immediately after installation and charge without interruption to the end of the cycle before powering on.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy e-readers show wildly incorrect battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eE-ink devices track battery state through a firmware fuel gauge that builds its reference model over time. When you swap the cell, the stored model no longer matches the new cell's actual charge curve. The percentage display will jump around — sometimes showing 100%, sometimes dropping to 20% within minutes — until the firmware recalibrates. One full charge-to-discharge-to-full cycle usually resets the gauge to an accurate reading.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eE-reader not powering on at all after fitting the new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship in storage mode, typically around 3.7V per cell — enough to protect the chemistry in transit but below the minimum boot voltage most e-reader boards require. The device will not turn on until the cell reaches its operational threshold. Connect the USB cable to a wall adapter, not a PC port, and leave it for at least 10 minutes before pressing the power button. The charge indicator light or on-screen animation should appear before the device boots.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360263012442,"sku":"BWCS-PNR710SL-1","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360263045210,"sku":"BWCS-PNR710SL-2","price":41.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360263077978,"sku":"BWCS-PNR710SL-3","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PNR710SL-1.webp?v=1778611022"},{"product_id":"pandigital-novel-tablet-color-replacement-battery-37v-3200mah-li-polymer","title":"Pandigital Novel Tablet Color MLP3595100 Replacement Battery 3.7V 3200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePandigital Novel Tablet Color (R7T40WWHFI) — 3.7V Li-Polymer Replacement Battery (MLP3595100)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 3200mAh Li-Polymer cell replaces the original MLP3595100 battery in the Pandigital Novel Tablet Color (model R7T40WWHFI). It fits the flat-cell cavity behind the rear panel and connects via the stock JST-style harness. Capacity matches the factory spec at 11.84Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNovel Tablet Color and R7T40WWHFI fit:\u003c\/strong\u003e\n    Both model designations share the same physical chassis, battery bay dimensions, and 3.7V single-cell power rail. The connector pinout and BMS handshake protocol are identical across both, so one cell covers both.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the Novel Tablet Color platform. The BMS accepted the new cell without fault flags, voltage regulation held steady at the processor rail, and the display backlight held consistent brightness through the discharge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging on the Novel Tablet Color:\u003c\/strong\u003e\n    After installing, connect the device to its USB charger and run a complete charge cycle before powering on. The Novel Tablet Color firmware recalibrates its battery percentage gauge only during a full charge — skipping this step causes the indicator to report inaccurate readings from the first boot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Novel Tablet Color shows 0% immediately after a new cell is fitted\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically 3.6V to 3.85V — which sits inside the normal operating range but below the firmware's calibration reference. The Novel Tablet Color reads the new cell as uncalibrated and defaults the gauge to zero. This is a firmware behaviour, not a cell fault. Plug into USB power before the first boot, let the indicator climb to 100%, then power on normally.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePage turns becoming sluggish after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSlow e-ink refresh after a swap usually points to the processor running under a suppressed voltage rail. If the new cell was stored at low voltage, the BMS may throttle output current to protect the cell during initial recovery. The display controller draws a brief high-current pulse to drive the e-ink panel — under a restricted rail, that pulse takes longer to resolve. Charge the device to at least 3.9V per cell before extended use, and the refresh speed returns to normal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360263340122,"sku":"BWCS-PNR740SL-1","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360263372890,"sku":"BWCS-PNR740SL-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360263405658,"sku":"BWCS-PNR740SL-3","price":40.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PNR740SL-1.webp?v=1778611022"},{"product_id":"barnes-noble-nook-simple-touch-replacement-battery-37v-2150mah-li-polymer","title":"Barnes \u0026 Noble Nook Simple Touch DR-NK03 Replacement Battery 3.7V 2150mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBarnes \u0026amp; Noble Nook Simple Touch — 3.7V Li-Polymer Replacement Battery (DR-NK03)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 2150mAh Li-Polymer cell replaces the original battery in the Barnes \u0026amp; Noble Nook Simple Touch e-reader. It fits the BNRV300 and Simple Touch 6\" (BNTV350) variants. Swap it in when the original no longer holds a charge or the device fails to boot.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBNRV300 and BNTV350 compatibility:\u003c\/strong\u003e\n    Both the BNRV300 and BNTV350 variants use the same 3.7V cell footprint, connector pinout, and BMS handshake. The DR-NK03 part number covers all three variant names — Nook Simple Touch, Simple Touch 6\", and BNTV350 — because they share identical battery bay dimensions (91.50 × 56.00 × 4.13mm) and protection circuit requirements.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Simple Touch platform. The BMS accepted the cell without flagging a protection fault, and the firmware began percentage reporting normally after a full charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on the Simple Touch:\u003c\/strong\u003e\n    After installation, connect via USB and allow a complete charge before first use. The Nook Simple Touch firmware recalibrates its battery percentage display against a full-charge reference point — skipping this step causes the gauge to read inaccurately from the first session onward.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Nook Simple Touch shows incorrect battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Simple Touch firmware stores a charge reference from the previous cell. When a new cell is installed, that stored reference no longer matches the actual cell chemistry and capacity. The percentage display pulls from the old reference until the firmware resets it through a full charge-to-discharge cycle. Run at least one complete cycle — charge to 100%, use until the low-battery warning — and the gauge will re-anchor to the new cell's actual voltage curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eNook Simple Touch not powering on after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA replacement Li-Polymer cell shipped in storage state typically sits at 3.0–3.2V, which is below the Nook Simple Touch's minimum boot voltage threshold. The device will not attempt to start if the cell voltage is too low. Connect the Nook to a USB charger immediately after installing the cell and leave it for at least 10 minutes before pressing the power button. If the screen remains blank after that window, confirm the battery connector is fully seated — the flat flex connector on this model can partially disengage during reassembly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360263831642,"sku":"BWCS-BNR003SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360263864410,"sku":"BWCS-BNR003SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360263897178,"sku":"BWCS-BNR003SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BNR003SL-1.webp?v=1778611048"},{"product_id":"pandigital-novel-9-replacement-battery-37v-3000mah-li-polymer","title":"Pandigital Novel 9 Compatible Battery BP-PO2-11\/3400CL 3.7V 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePandigital Novel 9 \/ Supernova DLX 8 — 3.7V Li-Polymer Replacement Battery (BP-PO2-11\/3400CL)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 3000mAh lithium-polymer cell replaces the original battery in the Pandigital Novel 9 (R90L200) and Supernova DLX 8 e-readers. It matches the OEM dimensions at 101.60 x 66.70 x 4.20mm, so it seats flat inside the chassis without lifting the back cover. Swap this in when the original no longer holds a charge or the device shuts off mid-session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNovel 9 and Supernova DLX 8 compatibility:\u003c\/strong\u003e\n    Both devices share the same battery bay dimensions, connector pinout, and 3.7V supply rail, which is why one cell covers the full model range. The BMS communicates charge state to the same firmware stack across R90L200 and DLX 8 variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Novel 9 platform. The BMS accepted the cell without fault codes, charge termination triggered correctly at 4.2V, and the firmware reported accurate state-of-charge throughout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging tip for e-reader firmware:\u003c\/strong\u003e\n    After installation, connect via USB and charge through one complete cycle before use. The Novel 9 firmware recalibrates its battery percentage display against a full charge cycle — skipping this step causes the indicator to read inaccurately from the first boot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Novel 9 shows low battery immediately after a new cell is installed\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage, typically 3.6–3.8V, not at full charge. The Novel 9 firmware reads this as a partially depleted battery and flags it immediately on the status bar. This is not a fault with the cell — it is the firmware comparing the resting voltage against its calibration table. Connect the charger before the first boot and allow the cell to reach 4.2V before powering on.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePage turn response slows down before the battery indicator shows critical\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe e-ink display on the Novel 9 draws a short high-current pulse to refresh each page. As cell voltage drops below roughly 3.5V, that pulse takes longer to complete, which adds a visible lag to every page turn. The battery percentage indicator often still reads 15–20% at this point because the firmware's voltage-to-percentage curve is not linear at the low end. If response feels sluggish, check actual resting voltage with a multimeter — anything below 3.5V means the cell needs a charge cycle, regardless of what the screen shows.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360264257626,"sku":"BWCS-PNR009SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360264290394,"sku":"BWCS-PNR009SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360264323162,"sku":"BWCS-PNR009SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PNR009SL-1.webp?v=1778611065"},{"product_id":"sony-prs-700-replacement-battery-37v-800mah-li-polymer","title":"Sony PRS-700 Replacement Battery 3.7V 800mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony PRS-700 \/ PRS-700BC — 3.7V Li-Polymer Replacement Battery (A98839601 294)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 800mAh lithium-polymer cell replaces the original battery in the Sony PRS-700 and PRS-700BC e-readers. It matches the OEM part number A98839601 294 and fits the same 63.00 × 36.00 × 4.00mm footprint as the factory cell. If your Reader powers off unexpectedly or won't hold a charge through a reading session, this is the direct replacement cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePRS-700 and PRS-700BC compatibility:\u003c\/strong\u003e\n    Both models use the same internal battery bay, connector pinout, and BMS handshake protocol. A single cell covers both variants — no adapter or modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a PRS-700 unit and confirmed the BMS accepted the new cell without error flags, reported voltage correctly through the firmware, and held charge across multiple charge cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge calibration on e-reader firmware:\u003c\/strong\u003e\n    After swapping the cell, charge via USB until the indicator shows 100% before switching the device on. Sony Reader firmware recalibrates its battery percentage display against a full-charge baseline — skipping this step causes the percentage counter to jump or read inaccurately from the start.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the PRS-700 shows low battery immediately after a new cell is installed\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically around 3.6V to 3.85V — not at full charge. The PRS-700 firmware reads this as a partially depleted battery and flags it immediately. The cell itself is not faulty. Connect the device to USB and charge it to 4.2V (full) before powering on. Once the firmware completes a full charge cycle, the percentage display tracks the new cell correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePRS-700 not powering on at all after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the cell voltage has dropped below approximately 3.0V during storage or shipping, the PRS-700's BMS will block startup to protect the system — the device appears completely dead. Connect it to a USB charger and leave it for at least 10 minutes without pressing the power button. The BMS needs to detect a minimum threshold voltage before it permits a boot sequence. Once charging begins and the LED activates, the device will power on normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360264683610,"sku":"BWCS-PRD700SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360264716378,"sku":"BWCS-PRD700SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360264749146,"sku":"BWCS-PRD700SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PRD700SL-1.webp?v=1778611066"},{"product_id":"amazon-kindle-6-replacement-battery-37v-750mah-li-polymer","title":"Amazon Kindle 6 MC-265360 Compatible Battery 3.7V 750mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle 6 \/ Kindle 4 Series — 3.7V Li-Polymer Replacement Battery (MC-265360)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 750mAh (2.78Wh) lithium-polymer cell for the Amazon Kindle 6, Kindle 4, and Kindle 4G e-readers. It matches OEM part numbers MC-265360, 515-1058-01, and M11090355152. If your Kindle no longer holds a charge or fails to power on, this cell replaces the original.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKindle 4 and Kindle 6 compatibility:\u003c\/strong\u003e\n    Both generations share the same 3.7V Li-Polymer form factor, connector pinout, and BMS communication protocol — one cell fits the full range of D01100-series boards without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on a Kindle 6 unit. The BMS accepted the cell on first connection, reported state-of-charge correctly, and held voltage above 3.5V through a sustained e-ink workload.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle:\u003c\/strong\u003e\n    After installing this cell, connect the Kindle to a USB charger and run a complete charge before use. The Kindle firmware recalibrates its battery percentage display against the new cell during that first full cycle — skipping it causes the percentage indicator to read incorrectly for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Kindle 6 shows \"Low Battery\" immediately after a new cell is installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship in storage mode, typically sitting between 3.6V and 3.7V — below the firmware threshold the Kindle treats as \"charged.\" The device reads that resting voltage, flags it as low, and may refuse to boot past the USB charge screen. This is a voltage floor issue, not a faulty cell. Connect to USB power for at least 10 minutes and the Kindle will boot normally once the cell clears the minimum boot threshold.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping or freezing after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Kindle's fuel gauge IC learns cell characteristics over one or two full charge-discharge cycles. A brand-new cell has no learned profile, so the reported percentage can jump from 40% to 80% or freeze at a fixed number mid-use. This is firmware recalibration, not a hardware fault. Run two complete charge cycles — USB charge to 100%, use until the device warns low — and the percentage display will stabilise.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360265109594,"sku":"BWCS-ABD006SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360265142362,"sku":"BWCS-ABD006SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360265175130,"sku":"BWCS-ABD006SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ABD006SL-1.webp?v=1778611048"},{"product_id":"sony-prs-350-replacement-battery-37v-900mah-li-polymer","title":"Sony PRS-350 Replacement Battery 3.7V 900mAh LIS1459MHPC9SY6","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony PRS-350 \/ PRS-650 Series — 3.7V Li-Polymer Replacement Battery (LIS1459MHPC9SY6)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 900mAh lithium-polymer cell for the Sony PRS-350, PRS-350SC, PRS-650, and PRS-650BC e-readers. It replaces OEM part LIS1459MHPC9SY6 (also listed as 1-853-016-11). The flat pouch cell fits the original battery bay with the same connector and contact layout as the factory unit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePRS-350 and PRS-650 platform compatibility:\u003c\/strong\u003e\n    Both the PRS-350 and PRS-650 share the same 3.7V battery rail and connector pinout. The BMS on each model communicates fuel-gauge data over the same two-wire interface, so one cell works across the full range without any modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the PRS-350 and confirmed the BMS accepted the new cell, reported charge state correctly, and did not trigger a protection cutoff during the e-ink page-refresh load spikes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap firmware calibration:\u003c\/strong\u003e\n    After installing the new cell, charge the reader through its micro-USB port until the indicator shows full before the first use. The PRS-350 firmware resets its battery percentage model at that point — skipping this step causes the charge display to jump erratically for the first several cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the PRS-350 shows a low battery warning immediately after a new cell is fitted\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship in storage mode, typically between 3.0V and 3.3V. The PRS-350 firmware sets its low-battery warning threshold around 3.5V, so a cell fresh out of packaging reads as critically low before any charge is applied. This is not a fault with the cell or the board. Connect the reader to a USB power source straight after installation and leave it until the status light confirms a full charge. The firmware will then anchor its percentage display to the new cell's actual capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePRS-350 not powering on after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the reader shows nothing on screen when you press the power button after swapping the cell, the new battery's voltage is likely below the minimum boot threshold the BMS requires to start the system. Connect a USB charger and wait at least ten minutes before pressing power again — the board needs enough charge to initialise before it will respond to the power button. If the screen remains blank after charging, press and hold the reset pinhole on the rear for five seconds while connected to USB, then attempt to power on again. The device should boot once cell voltage reaches approximately 3.6V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360265699418,"sku":"BWCS-PRD350SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360265732186,"sku":"BWCS-PRD350SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360265764954,"sku":"BWCS-PRD350SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PRD350SL-1.webp?v=1778611065"},{"product_id":"pandigital-novel-7-replacement-battery-37v-2900mah-li-polymer","title":"Pandigital Novel 7 Replacement Battery 3.7V 2900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePandigital Novel 7 \/ PRD07T20WBL1 — 3.7V Li-Polymer Replacement Battery (BP-S21-11\/2740 LS)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 2900mAh lithium-polymer cell is a direct replacement for the Pandigital Novel 7 e-reader (model PRD07T20WBL1). It fits the original battery bay using the same connector and matches the factory spec for voltage and capacity. OEM part number BP-S21-11\/2740 LS.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNovel 7 and PRD07T20WBL1 compatibility:\u003c\/strong\u003e\n    Both model designations share the same battery bay geometry, connector pinout, and 3.7V supply rail. The BMS expects the same charge curve, so the replacement cell communicates with the firmware's charge controller without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the Novel 7 platform. The BMS accepted the new cell without fault codes, and charge termination triggered correctly at 4.2V cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirmware calibration after cell swap:\u003c\/strong\u003e\n    The Novel 7's battery percentage display recalibrates to a new cell only after a complete charge cycle. Connect the device via USB immediately after installation and charge to 100% before first boot — skipping this step causes the firmware to report inaccurate percentages for several cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Novel 7 won't boot after a battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-polymer cells drop to storage voltage — typically 3.6–3.7V — during warehousing. The Novel 7's boot sequence requires a minimum voltage threshold before it will attempt to power on. If the cell ships at or below that threshold, the device appears completely dead even with a brand-new battery installed. Connect the USB charger and leave the device alone for 10 minutes before pressing the power button. The charge controller will pre-condition the cell and bring it above boot voltage.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping around in the first few sessions\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Novel 7 firmware stores capacity reference points from the previous cell. After a swap, those reference points no longer match the new cell's discharge curve, so the percentage indicator jumps — dropping suddenly or reading higher than actual. This corrects itself after two to three full charge-to-discharge cycles. Run the device from 100% down to the low-battery warning without interrupting the cycle, then charge fully each time. By the third cycle, percentage readings stabilise.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360266289242,"sku":"BWCS-PNR007SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360266322010,"sku":"BWCS-PNR007SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360266354778,"sku":"BWCS-PNR007SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PNR007SL-1.webp?v=1778611066"},{"product_id":"amazon-s11s01a-replacement-battery-37v-1100mah-li-ion","title":"Amazon Kindle S11S01A Compatible Battery 3.7V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle S11S01A \/ D00701 — 3.7V Li-ion Replacement Battery (S11S01B)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1100mAh Li-ion cell that fits the Amazon Kindle S11S01A, D00701, and D00701 WiFi e-readers. It replaces the original S11S01B battery when capacity has dropped and the device can no longer hold a useful charge. Dimensions are 65.54 × 53.20 × 4.96mm — measure your existing cell before ordering if you are unsure.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eS11S01A and D00701 compatibility:\u003c\/strong\u003e\n    Both models share the same physical footprint, connector pinout, and 3.7V voltage rail. The BMS on each device uses the same charge-termination handshake, so one cell covers the full group without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the S11S01A platform. The BMS accepted the cell cleanly, hit full charge termination at 4.2V, and the e-ink controller drew steady current with no BMS fault interruptions.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on Kindle firmware:\u003c\/strong\u003e\n    After installing this cell, connect the Kindle via USB and charge it completely before switching it on. Kindle firmware reads the battery percentage from a coulomb counter that resets on cell swap — skipping the full charge cycle causes the percentage display to report incorrect figures from the first boot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKindle not powering on after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship in storage mode — typically around 3.0V to 3.3V. The Kindle's boot sequence requires a minimum voltage on the battery rail before the processor will initialise. If the cell voltage sits below that threshold, the device shows nothing when you press the power button. Connect the USB charger immediately after installation and leave it for at least 10 minutes before attempting to power on. The charge circuit will raise the cell voltage into the boot window, and the Kindle will start normally from that point.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping or reading 0% right after a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Kindle's fuel gauge IC tracks charge state by counting current in and out of the cell over time. A brand-new cell has no history in that counter, so the reported percentage is effectively a guess until a full charge-to-discharge cycle completes. Percentage jumps of 20–30% in either direction are normal in the first few sessions. Run the device from 100% down to auto-shutdown at least once, then charge back to 100% — the firmware recalibrates the gauge to the actual cell capacity after that cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360266879066,"sku":"BWCS-ABD004SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360266911834,"sku":"BWCS-ABD004SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360266944602,"sku":"BWCS-ABD004SL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ABD004SL-1.webp?v=1778611048"},{"product_id":"barnes-noble-nook-color-replacement-battery-37v-3200mah-li-polymer","title":"Barnes \u0026 Noble NOOK Color 3.7V Compatible Battery 3200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBarnes \u0026amp; Noble NOOK Color — 3.7V Li-Polymer Replacement Battery (AVPB001-A110-01)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 3200mAh lithium-polymer cell replaces the original battery in the Barnes \u0026amp; Noble NOOK Color e-reader. It also fits the Nook Tablet and BNTV250A. Swap it in when the original cell can no longer hold enough charge to get through a reading session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNOOK Color and Nook Tablet platform fit:\u003c\/strong\u003e\n    The NOOK Color and Nook Tablet share the same battery bay dimensions, connector pinout, and 3.7V supply rail. Both devices use the same BMS communication protocol, so this cell registers correctly on either platform without triggering a fault state.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on NOOK Color hardware. The BMS accepted the cell without error, balanced charging initiated normally, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging on the NOOK Color:\u003c\/strong\u003e\n    After fitting this cell, charge via USB until the indicator shows full before powering on. The NOOK Color's firmware recalibrates the battery percentage display from a complete charge cycle — skipping this step causes the percentage counter to read inaccurately for the first several sessions.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the NOOK Color battery percentage jumps around after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe NOOK Color tracks battery state using a fuel gauge algorithm calibrated to the original cell's discharge curve. When a new cell goes in, that calibration is out of sync until the firmware runs a full charge-to-discharge cycle. Until then, percentage readings can jump several points between page turns or drop suddenly without warning. Run two full charge cycles — charge to 100%, read until shutdown, then charge to 100% again — and the gauge settles.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eNOOK Color showing low battery warning immediately after new cell installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship in storage state, typically between 3.0V and 3.3V. The NOOK Color's firmware treats anything below roughly 3.5V as a low-battery condition and throws the warning immediately on boot. This is not a faulty cell. Connect the USB charger before attempting to power on and leave it for at least 10 minutes — once the cell climbs above the minimum threshold, the warning clears and normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360267173978,"sku":"BWCS-BNR002SL-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360267206746,"sku":"BWCS-BNR002SL-2","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360267239514,"sku":"BWCS-BNR002SL-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BNR002SL-1.webp?v=1778611048"},{"product_id":"sony-prs-300-replacement-battery-37v-680mah-li-polymer","title":"Sony PRS-300 Replacement Battery LIS1382(S) 3.7V 680mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony PRS-300 Series — 3.7V Li-Polymer Replacement Battery (LIS1382(S))\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 680mAh lithium-polymer replacement battery for the Sony PRS-300 e-reader series. It fits the PRS-300, PRS-300SC, PRS-300RC, and PRS-300BC. It replaces OEM part LIS1382(S) and cross-references 1-756-769-31, 9702A50844, and 9924A60515.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePRS-300 series fit:\u003c\/strong\u003e\n    The SC, RC, and BC variants of the PRS-300 share the same battery bay dimensions, voltage rail, and connector pinout as the base model. One cell covers all four variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the PRS-300's charge circuit and confirmed the BMS accepted charge without flagging an incompatible cell. Charge termination and cutoff voltage behaved as expected at the device's 4.2V ceiling.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle:\u003c\/strong\u003e\n    After installing this cell, charge via USB before powering on. The PRS-300 firmware reads battery state-of-charge at boot. If the cell voltage is below the boot threshold from storage, the device will not initialise — connect USB first and allow at least a partial charge before pressing the power button.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the PRS-300 shows incorrect battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe PRS-300 stores a charge profile in firmware tied to the previous cell's discharge curve. After swapping to a new cell, the displayed percentage will often read inaccurately for the first few cycles. This is not a fault with the replacement cell — it is the firmware recalibrating its internal model. Run two or three full charge-to-discharge cycles and the percentage display will stabilise. No hardware reset is required.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePRS-300 not powering on after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at partial storage voltage, typically around 3.6–3.8V. The PRS-300 requires a minimum boot voltage closer to 3.7V to initialise the e-ink controller — cells at the low end of storage voltage will not clear that threshold. Connect the device to a USB power source immediately after installation and wait at least 10 minutes before attempting to power on. If the charge LED activates, the cell is seated correctly and the device will boot once voltage climbs above the boot threshold.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360267599962,"sku":"BWCS-PRD300SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360267632730,"sku":"BWCS-PRD300SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360267665498,"sku":"BWCS-PRD300SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PRD300SL-1.webp?v=1778611066"},{"product_id":"sony-prs-600-replacement-battery-37v-800mah-li-polymer","title":"Sony PRS-600 Replacement Battery 3.7V 800mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony PRS-600 Series — 3.7V Li-Polymer Replacement Battery (A98927554931)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 800mAh Li-Polymer cell for the Sony PRS-600, PRS-600\/RC, and PRS-600\/BC e-readers. It replaces the original battery when years of charge cycles have reduced capacity to the point where the device no longer holds a usable charge. Dimensions are 63.52 × 34.12 × 3.65mm — measure your original cell before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePRS-600 series fitment:\u003c\/strong\u003e\n    The PRS-600, PRS-600\/RC, and PRS-600\/BC share the same battery bay dimensions, connector pin-out, and BMS handshake requirements. All three accept this cell without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the PRS-600 platform. The BMS accepted the cell without a fault flag, and the e-ink controller drew consistent current through full page-refresh cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle:\u003c\/strong\u003e\n    After fitting this battery, charge via USB until the on-screen indicator shows full before use. The PRS-600 firmware recalibrates its battery percentage display against a full charge reference — skipping this step causes the percentage counter to read erratically from the first session.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the PRS-600 shows low battery immediately after a new cell is installed\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship in storage mode, typically sitting between 3.6V and 3.7V. The PRS-600 firmware sets its low-battery warning threshold relative to a calibrated full-charge baseline it has not yet recorded for the new cell. Until the firmware completes one full charge cycle, it interprets the uncalibrated state-of-charge data as a near-empty cell. Connect the USB cable, let the device charge to 100%, and the warning clears on its own.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping around after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe PRS-600 stores charge-curve data from the previous cell in firmware memory. When a new cell goes in, that stored curve no longer matches the actual cell behaviour, so the percentage reading jumps as the firmware tries to map old data to new voltage readings. This resolves through one or two full charge-and-discharge cycles, after which the firmware rewrites its curve data. If the jumping persists past two full cycles, verify the USB cable is delivering consistent 5V and not dropping mid-charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360268025946,"sku":"BWCS-PRD600SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360268058714,"sku":"BWCS-PRD600SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360268091482,"sku":"BWCS-PRD600SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PRD600SL-1.webp?v=1778611066"},{"product_id":"sony-portable-reader-prs-900-replacement-battery-37v-1400mah-li-ion","title":"Sony PRS-900 Portable Reader Compatible Battery 3.7V 1400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony Portable Reader PRS-900 — 3.7V Li-ion Replacement Battery (1-756-915-11)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1400mAh Li-ion cell replaces the original battery in the Sony Portable Reader PRS-900 and PRS-900BC, also sold as the Sony Reader Daily Edition. It fits models using OEM part numbers 1-756-915-11, PRSA-BP9, and PRSA-BP9\/\/C(U3). Swap it in when the original cell no longer holds enough charge to get through a reading session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePRS-900 and PRS-900BC compatibility:\u003c\/strong\u003e\n    Both variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol. A single cell covers both units — no hardware differences affect fitment.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on PRS-900 hardware. The BMS accepted the new cell without fault codes, and the firmware recognised the pack without requiring a manual reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eWi-Fi sync and charge management:\u003c\/strong\u003e\n    The PRS-900 draws significantly more current during Wi-Fi sync than during page turns. After installing this cell, complete a full USB charge cycle before enabling wireless sync — the firmware needs a full charge reference point to report battery percentage accurately after a cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the PRS-900 shows a low battery warning immediately after a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically between 3.6V and 3.7V — which sits just above the device's low-battery threshold. The PRS-900 firmware reads this as a near-depleted pack before any calibration has occurred. This is not a faulty cell. Connect the device to a USB charger and allow it to reach a full charge before first use. Once the firmware completes one full charge cycle, the battery percentage indicator will report correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePRS-900 not powering on after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the device shows no response after swapping the cell, the new battery's resting voltage may have dropped below the PRS-900's minimum boot voltage during storage. The device will not attempt to power on below approximately 3.4V. Connect the reader to a USB charger and leave it for at least 10 minutes without pressing the power button — the charging circuit will pre-charge the cell to a level where the boot sequence can start. After 10 minutes, press and hold the power button for five seconds.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360268484698,"sku":"BWCS-PRD900SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360268517466,"sku":"BWCS-PRD900SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360268550234,"sku":"BWCS-PRD900SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PRD900SL_1.webp?v=1778611066"},{"product_id":"amazon-kindle-3-replacement-battery-37v-1900mah-li-polymer","title":"Amazon Kindle 3 Replacement Battery S11GTSF01A 3.7V 1900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle 3 — 3.7V Li-Polymer Replacement Battery (S11GTSF01A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1900mAh lithium-polymer battery replaces the original cell in the Amazon Kindle 3 e-reader. It fits the Kindle 3 Wi-Fi and Kindle 3G variants, all sharing the same battery footprint and connector. Dimensions are 96 × 67 × 4mm — confirm clearance before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKindle 3 platform fit:\u003c\/strong\u003e\n    The Kindle 3, Kindle III, Kindle 3 Wi-Fi, and Kindle 3G all use the same battery bay, connector pin-out, and BMS handshake. One cell covers the full Kindle 3 generation without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge-discharge cycle on a Kindle 3 unit. The BMS accepted the new cell without fault flags, and the firmware cycled through its calibration pass on the first full charge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on the Kindle 3:\u003c\/strong\u003e\n    After fitting this cell, connect via USB and let it charge completely before switching the device on. Kindle 3 firmware recalibrates the battery percentage display during that first full charge — skipping it leaves the indicator inaccurate for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Kindle 3 shows a low battery warning immediately after a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement Li-Polymer cells ship at storage voltage — typically 3.6–3.85V, which sits below the Kindle 3's firmware threshold for a \"full\" reading. The device sees an unrecognised charge state and throws a low battery warning even though the cell is not flat. This is a firmware calibration issue, not a faulty battery. Connect to USB and charge fully before first use — the warning clears once the cell reaches 4.2V and the firmware logs a complete cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKindle 3 battery percentage jumping around after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Kindle 3 estimates state-of-charge by tracking voltage curves it learned from the old, degraded cell. After a swap, those learned curves no longer match the new cell's discharge profile, so the percentage gauge jumps — sometimes dropping 20% suddenly then recovering. The firmware corrects this by running two or three full charge-discharge cycles to relearn the curve. Run the battery down to the auto-shutdown point, then charge fully, twice — the percentage display stabilises after that.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360268779610,"sku":"BWCS-ABD003SL-1","price":16.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360268812378,"sku":"BWCS-ABD003SL-2","price":18.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360268845146,"sku":"BWCS-ABD003SL-3","price":20.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ABD003SL-1.webp?v=1778611048"},{"product_id":"barnes-noble-005-replacement-battery-37v-1250mah-li-ion","title":"Barnes \u0026 Noble NOOK 005 Compatible Battery 3.7V 1250mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBarnes \u0026amp; Noble NOOK Classic \/ BNRZ100 — 3.7V Li-ion Replacement Battery (BNRB1530)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1250mAh Li-ion cell replaces the original battery in the Barnes \u0026amp; Noble NOOK e-reader, model 005 (OEM part BNRB1530). It fits the NOOK Classic and BNRZ100 variants that share the same battery bay dimensions and connector. Capacity matches factory spec at 4.63Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNOOK 005, BNRZ100, and Classic compatibility:\u003c\/strong\u003e\n    These models share the same 3.7V single-cell architecture, connector pinout, and BMS handshake protocol — that's why one cell covers all three. The e-ink controller and CPU draw from the same rail, so voltage tolerance is identical across the group.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a NOOK 005 unit and confirmed the BMS accepted charge without error flags, the low-battery cutoff triggered at the correct threshold, and the display stayed stable through repeated page turns at full draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge calibration after swap:\u003c\/strong\u003e\n    After installing, charge via USB until the indicator shows full before powering on. The NOOK firmware uses the first full charge cycle to set its fuel-gauge baseline — skipping this step causes the battery percentage to read incorrectly from the first boot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the NOOK 005 shows low battery immediately after a new cell is installed\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship at storage voltage — typically around 3.6V — which sits just above the NOOK's low-battery warning threshold. The firmware reads that resting voltage on first boot and flags it as nearly depleted before any charge measurement has occurred. This is a firmware read issue, not a faulty cell. Connect the device to USB power immediately after the first boot and let it charge fully before using it.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping around after a cell swap on the NOOK Classic\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe NOOK's fuel gauge learns cell behaviour over charge and discharge cycles — after a swap, it has no history for the new cell. Until it completes two or three full cycles, percentage readings can jump from 80% to 40% with no load change. This is recalibration, not a defective battery. Run two complete charge cycles from under 10% to full, and the gauge will stabilise.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360269500506,"sku":"BWCS-BNR005SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360269533274,"sku":"BWCS-BNR005SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360269566042,"sku":"BWCS-BNR005SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BNR005SL-1.webp?v=1778611048"},{"product_id":"amazon-kindle-2-replacement-battery-37v-1100mah-li-ion","title":"Amazon Kindle 2 Replacement Battery DR-A011 3.7V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle 2 \/ Kindle DX — 3.7V Li-ion Replacement Battery (DR-A011)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1100mAh Li-ion cell replaces the original battery in the Amazon Kindle 2, Kindle II, and Kindle DX e-readers. It matches OEM part numbers DR-A011 and 170-1012-00. Install it when the original cell no longer holds a charge or the device shuts down unexpectedly during reading.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKindle 2 and Kindle DX compatibility:\u003c\/strong\u003e\n    Both devices share the same battery bay dimensions, connector pinout, and BMS handshake protocol — one cell fits all three model variants listed without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a Kindle 2 unit. The BMS accepted the cell, reported state-of-charge correctly, and did not trigger any protection cutoff during normal e-ink refresh load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on Kindle 2:\u003c\/strong\u003e\n    After fitting a new cell, connect via the device's USB cable and allow a full charge to complete before powering on. Kindle firmware recalibrates its battery percentage display against a full charge cycle — skipping this step causes the indicator to jump or read inaccurately for several sessions.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Kindle 2 won't boot after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement cells ship in storage state, typically around 3.0V to 3.3V. The Kindle 2 bootloader requires a minimum voltage threshold — usually around 3.4V — before it will attempt to power on. If the device shows nothing on screen after installation, the cell is not dead; it is simply below the boot floor. Connect USB power and leave it for 10 minutes before pressing the power button. At that point the device should respond and begin a normal charge sequence.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping around after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eKindle firmware tracks battery state using coulomb-counting data from the previous cell. When a new cell goes in, those stored figures no longer match the actual charge state, causing the percentage display to read erratically — jumping from 80% to 40% between page turns, or dropping suddenly. This is a firmware recalibration issue, not a fault with the cell. Run two full charge and discharge cycles to let the device re-establish its baseline, and the percentage display will stabilise.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360269992026,"sku":"BWCS-ABD002SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360270024794,"sku":"BWCS-ABD002SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360270057562,"sku":"BWCS-ABD002SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ABD002SL-1.webp?v=1778611047"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/collections\/BW-CS-AST290SL-5.webp?v=1780883576","url":"https:\/\/batteryweb.com\/collections\/e-book-e-reader.oembed?page=4","provider":"BatteryWeb","version":"1.0","type":"link"}