{"product_id":"amazon-kindle-fire-hd-replacement-battery-37v-4000mah-li-polymer","title":"Amazon Kindle Fire HD Replacement Battery 3.7V 4000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle Fire HD \/ Fire 7\" — 3.7V Li-Polymer Replacement Battery (26S1001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 4000mAh lithium-polymer cell replaces the original battery in the Amazon Kindle Fire HD, Kindle Fire 7\", and X43Z60 variants including the 2013 Kindle Fire HD. It matches the OEM connector, physical footprint (145.52 × 81.74 × 2.92mm), and BMS communication required by the Fire's charge controller.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFire HD and Fire 7\" platform fit:\u003c\/strong\u003e\n    Amazon used the same 26S1001 cell across multiple Fire generations — the 3.7V rail, flex connector, and BMS handshake are shared. OEM part numbers 26S1001-1A, 26S1001-1D, 58-000035, and DR-A015 all cross-reference this same physical cell.\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 cycle on a Kindle Fire HD unit. The charge IC accepted the new cell without fault flags, and the BMS communicated state-of-charge data correctly to the OS across multiple discharge passes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge reset after installation:\u003c\/strong\u003e\n    After fitting this battery, run the tablet down to automatic shutoff, then charge it uninterrupted to 100%. This forces the Fire's fuel gauge IC to recalibrate against the new cell's actual capacity curve and clears the inaccurate percentage readings that typically appear after a swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKindle Fire HD shutting down at 15–25% remaining after battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still calibrated to the old cell's voltage-to-capacity curve. When the new battery hits roughly 3.6V under the combined load of the display and active WiFi, the controller misreads it as critically low and forces a shutdown. The tablet still has usable charge — the gauge just doesn't know it yet. One full discharge-to-shutoff followed by an uninterrupted charge to 100% recalibrates the IC and resolves the early cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFast charging not available after Kindle Fire battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAmazon's Fire tablets use a proprietary charge negotiation sequence between the charge IC and the connected adapter. A freshly installed cell with zero charge history may cause the controller to fall back to standard 5V input until one full accepted charge cycle completes. Use the original Amazon charger — not a third-party USB-C or generic adapter — for the first charge. After one complete cycle, fast charge behaviour typically restores and the tablet will negotiate correctly on subsequent sessions.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426082685018,"sku":"BWCS-ABD007SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426082717786,"sku":"BWCS-ABD007SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426082750554,"sku":"BWCS-ABD007SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ABD007SL_1.webp?v=1779930307","url":"https:\/\/batteryweb.com\/products\/amazon-kindle-fire-hd-replacement-battery-37v-4000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}