{"title":"Storage","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWhether it's a storage unit alarm, a backup power system, or a security setup protecting your space, the battery behind it is the last thing you want to think about — until it fails. Batteries used in storage applications need to hold a charge over long periods and kick in reliably when called upon, because most of the time nobody's checking on them until something goes wrong. That's why choosing the right one from the start makes all the difference.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eAt BatteryWeb, we carry replacement batteries built for the kind of long-term, low-maintenance performance that storage applications demand. Shop by device or system type to find a compatible match, and rest easy knowing your equipment has a dependable power source behind it. The right battery in the right place means one less thing to worry about.\u003c\/p\u003e","products":[{"product_id":"kingston-mlw221-replacement-battery-37v-1500mah-li-ion","title":"Kingston MLW221 Replacement Battery 3.7V 1500mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKingston MLW221 — 3.7V Li-ion Replacement Battery (WMTM-169)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1500mAh Li-ion replacement battery for the Kingston MLW221 digital storage device. It fits the MLW221 directly, using OEM part number WMTM-169 as the compatibility reference. Install it when the original cell has degraded and the device no longer holds a usable charge.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMLW221 platform fit:\u003c\/strong\u003e\n    The MLW221 uses a compact single-cell Li-ion configuration at 3.7V nominal. This cell matches that voltage rail and the physical footprint — 50.20 × 51.30 × 5.50mm — so the connector seats correctly and the storage management system sees a valid cell 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 charge and discharge on the MLW221 platform and confirmed the BMS accepted the cell without a fault code. Capacity read-back stabilised after a full calibration cycle rather than the first charge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMLW221 calibration cycle after install:\u003c\/strong\u003e\n    The MLW221 storage management system estimates remaining capacity based on learned cell behaviour. After fitting a new cell, run the device down to low charge and then charge it fully in one uninterrupted session — this lets the firmware anchor its capacity estimate to the new cell's actual range.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eStorage battery not accepted by the MLW221 after installation\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe MLW221 storage management system validates the new cell during the first few charge cycles, not immediately on insertion. If the device shows a battery fault or refuses to complete a charge shortly after install, this is the firmware re-initialising against an unfamiliar cell profile. Give the system up to 24 hours of normal use and at least one full charge cycle. If the fault clears, the cell has been accepted — no hardware fault exists.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMLW221 showing lower capacity than 1500mAh after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell installed into the MLW221 does not automatically update the firmware's stored capacity estimate — the old cell's degraded profile may still be active. The device reports what it learned from the previous cell until a calibration cycle overwrites it. Discharge the device until it shuts off on its own, then charge uninterrupted to 4.2V full. After that single cycle, the capacity estimate displayed should align with the 1500mAh rating.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416243077210,"sku":"BWCS-KML221HD-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416243109978,"sku":"BWCS-KML221HD-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416243142746,"sku":"BWCS-KML221HD-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KML221HD-1.webp?v=1779761097"},{"product_id":"seagate-wireless-plus-teardown-replacement-battery-37v-2800mah-li-ion","title":"Seagate Wireless Plus 3.7V 2800mAh Li-ion Replacement Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSeagate Wireless Plus — 3.7V Li-ion Replacement Battery (UPF454261S-2S-1AYBA2)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 2800mAh Li-ion battery replaces the internal cell in the Seagate Wireless Plus portable wireless hard drive. It fits models STCK1000100, STCV2000100, and 1AYBA2. When the original cell degrades, wireless streaming and file sharing stop working — this cell restores that function.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWireless Plus model compatibility:\u003c\/strong\u003e\n    The STCK1000100 and STCV2000100 share the same internal battery bay geometry, connector pinout, and BMS handshake protocol. One cell covers the full Wireless Plus line 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 Wireless Plus unit. The BMS accepted the cell without fault flags, and the device's charge indicator tracked correctly from 0% to 100%.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration cycle:\u003c\/strong\u003e\n    After fitting this cell, run a full charge to 100%, then let the device discharge completely through normal use before recharging. The Wireless Plus firmware needs this cycle to calibrate its capacity estimate — skipping it results in inaccurate charge readings 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 Wireless Plus rejects a new cell on first boot\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Wireless Plus management firmware authenticates the battery's BMS data before accepting it as a known cell. A brand-new cell with no charge history can return unfamiliar state-of-charge values, causing the firmware to log an unrecognised battery state. This is not a fault with the cell — it resolves once the firmware completes its first full charge-discharge cycle and updates its internal reference. Allow up to 24 hours of normal use after the first full charge before treating any warning as a real error.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWireless Plus showing lower capacity than 2800mAh after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the device reports significantly less than 2800mAh after installation, the firmware calibration cycle has not completed. The capacity estimate is calculated from a charge-discharge baseline that the system builds over the first full cycle — without it, the firmware interpolates from factory defaults, which skews low. Charge the unit fully to 100%, use it until it shuts down from low battery, then recharge to 100% without interruption. After that cycle, the reported capacity will reflect the actual 2800mAh rated capacity of the cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416243175514,"sku":"BWCS-SBF100HD-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416243208282,"sku":"BWCS-SBF100HD-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416243241050,"sku":"BWCS-SBF100HD-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SBF100HD_1.webp?v=1779761131"},{"product_id":"seagate-goflex-satellite-mobile-wireless-storage-stbf500101-replacement-battery-37v-2800mah-li-ion","title":"Seagate GoFlex Satellite STBF500101 Compatible Battery 3.7V 2800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSeagate GoFlex Satellite STBF500101 — 3.7V Li-ion Replacement Battery (8390-K201-0180)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2800mAh Li-ion replacement battery for the Seagate GoFlex Satellite Mobile Wireless Storage. It fits the STBF500100 and STBF500101 models. The GoFlex Satellite is a portable wireless drive that streams files and handles backups over WiFi without cables.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSTBF500100 and STBF500101 compatibility:\u003c\/strong\u003e\n    Both units share the same internal battery bay, connector pinout, and BMS communication protocol — a single cell swap covers either model without any hardware 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 GoFlex Satellite platform. The BMS accepted the new cell, cleared the battery error flag, and reported capacity without any firmware intervention.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the GoFlex Satellite:\u003c\/strong\u003e\n    After installing, let the device run a full charge-to-discharge cycle before checking the capacity reading. The GoFlex Satellite's storage management firmware estimates remaining capacity based on a calibration cycle — skipping this step produces inaccurate readings in the interface, not a faulty cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the GoFlex Satellite shows a battery error after a new cell install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe GoFlex Satellite runs battery authentication through its storage management firmware, not just a voltage check. When a fresh cell is installed, the firmware may flag a battery error for up to 24 hours while it profiles the new cell's charge curve. This is normal behaviour and does not mean the replacement is faulty. Power the device on, let it complete a full charge cycle, and the error clears on its own.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGoFlex Satellite reporting less capacity than the rated 2800mAh\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA low capacity reading directly after installation almost always means the calibration cycle has not completed — not that the cell is underspec. The GoFlex Satellite's firmware anchors its capacity estimate to the first full discharge it observes on the new cell. Charge the device to 100%, let it discharge fully through normal use, then recharge completely. After that cycle, the reported capacity should align with the rated 2800mAh figure.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416243273818,"sku":"BWCS-SBF500HD-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416243306586,"sku":"BWCS-SBF500HD-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416243339354,"sku":"BWCS-SBF500HD-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SBF500HD_1.webp?v=1779761131"},{"product_id":"nexto-di-nd2700-replacement-battery-37v-2000mah-li-polymer","title":"Nexto DI ND2700 Replacement Battery 3.7V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNexto DI ND2700 \/ DI ND2725 — 3.7V Li-Polymer Replacement Battery (NENA-21120)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 2000mAh lithium-polymer battery replaces the internal cell in the Nexto DI ND2700 and DI ND2725 portable storage devices. It also fits the ND2325 and related models sharing the same battery bay and connector. When the original cell degrades, this replacement restores field operation for backing up memory cards without a computer.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eND2700 \/ ND2725 \/ ND2325 platform:\u003c\/strong\u003e\n    These models share the same 3.7V single-cell architecture, battery connector, and BMS handshake protocol. One cell revision covers the full range — no adapter or firmware workaround 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 ND2700 platform. The BMS accepted the new cell without fault flags, and the charge controller stepped through its standard constant-current to constant-voltage transition cleanly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the ND2700:\u003c\/strong\u003e\n    After fitting this battery, let the device charge to 100% via its USB port before use. The ND2700 firmware reads state-of-charge from a coulomb counter that resets during installation — skipping this step causes the capacity bar to display incorrectly 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\"\u003eND2700 battery error immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ND2700's battery management firmware checks cell voltage and internal resistance at startup. A new lithium-polymer cell that has been stored at partial charge can read slightly outside the expected window, triggering a transient error on first power-on. This is not a fault with the cell. Connect the device to USB power and allow the charger to begin the constant-current phase — the error clears once the firmware confirms a rising charge curve above 3.5V and accepts the new cell as valid.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCapacity gauge reads low after replacing the ND2700 battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ND2700 stores its capacity estimate in firmware, not in the cell itself. Installing a new 2000mAh cell does not automatically reset that estimate — the device may show 60–70% full capacity until a complete charge-discharge calibration cycle is run. Charge fully to 100%, then allow the device to run through a normal backup operation until the low-battery warning triggers. Recharge fully after that point. The firmware recalculates the 2000mAh baseline from the measured cycle and the gauge corrects to rated capacity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416243372122,"sku":"BWCS-NX2725SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416243404890,"sku":"BWCS-NX2725SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416243437658,"sku":"BWCS-NX2725SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NX2725SL-1.webp?v=1779761098"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/collections\/BW-CS-SBF500HD_1.webp?v=1780878399","url":"https:\/\/batteryweb.com\/collections\/storage.oembed","provider":"BatteryWeb","version":"1.0","type":"link"}