{"product_id":"amazon-kindle-fire-hd-8-replacement-battery-38v-4650mah-li-polymer","title":"Amazon Kindle Fire HD 8 Replacement Battery 26S1018 3.8V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazon Kindle Fire HD 8 — 3.8V Li-Polymer Replacement Battery (26S1018)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 4650mAh Li-Polymer battery replaces the original cell in the Amazon Kindle Fire HD 8 and PR53DC tablet. It matches OEM part numbers 26S1018, 58-000161, and MC-28A8B8. The battery powers the display, processor, wireless, and all onboard functions.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKindle Fire HD 8 and PR53DC fit:\u003c\/strong\u003e\n    Both tablets share the same 3.8V battery rail, connector pinout, and BMS handshake protocol — 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 ran this battery through full charge and discharge cycles on a Kindle Fire HD 8. The BMS negotiated charge acceptance correctly, voltage ramp was stable, and the protection circuit tripped at expected low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge reset after installation:\u003c\/strong\u003e\n    After fitting this cell, run the tablet down to automatic shutoff, then charge uninterrupted to 100%. This forces the fuel gauge IC to recalibrate against the new cell and clears inaccurate percentage readings that appear straight 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 8 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 voltage curve of the old, degraded cell. When display brightness and WiFi load combine, voltage sags faster than the gauge predicts, and the protection circuit hits cutoff before the reported percentage reaches zero. The tablet reads 20% but the actual cell voltage has already dropped below the safe threshold. One full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% resets the calibration and stops premature shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFast charging not available after fitting a new Kindle Fire HD 8 battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Kindle Fire HD 8 charge IC requires at least one completed charge cycle before it confirms the new cell's internal resistance and accepts higher charge rates. Immediately after installation, the charger may negotiate down to standard 5V\/1A as a safety measure. Plug in the original Amazon charger — third-party adapters can stall USB negotiation entirely — and let the first cycle complete without interruption. After that cycle, fast charging resumes at the rated input.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43425843216474,"sku":"BWCS-ABD800SL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43425843249242,"sku":"BWCS-ABD800SL-2","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43425843282010,"sku":"BWCS-ABD800SL-3","price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ABD800SL-1.webp?v=1779929951","url":"https:\/\/batteryweb.com\/products\/amazon-kindle-fire-hd-8-replacement-battery-38v-4650mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}