{"product_id":"acer-iconia-one-10-b3-a20-replacement-battery-37v-5700mah-li-polymer","title":"Acer Iconia One 10 B3-A20 Compatible Battery 3.7V 5700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAcer Iconia One 10 B3-A20 — 3.7V Li-Polymer Replacement Battery (PR-279594N)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 5700mAh (21.09Wh) lithium-polymer battery for the Acer Iconia One 10 B3-A20 10-inch Android tablet. It also fits the Iconia Tab 10 A3-A40, the A5008, and the Iconia One 10 B3-A30, among other models sharing the same cell footprint. OEM part numbers covered include PR-279594N, PR-279594N(1ICP3\/95\/94-2), and KT.0020H.002.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCross-model fit on the B3 and A3 platform:\u003c\/strong\u003e\n    These Acer Iconia tablets share the same 188.50 x 99.60 x 3.20mm cell envelope, 3.7V rail, and connector pinout. The BMS handshake is consistent across this lineup, so the same cell works across 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 B3-A20 board. The BMS accepted the cell immediately, balancing charge current correctly and triggering protection cutoff at the expected low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after install:\u003c\/strong\u003e\n    After fitting this battery, run the tablet down to automatic shutoff — do not force-power it off — then charge it uninterrupted to 100%. This single full cycle resets the fuel gauge IC against the new cell's actual capacity and clears the inaccurate percentage readings that commonly 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\"\u003eTablet shutting down at 15–25% remaining after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC was calibrated to the old, degraded cell. When a new cell with full capacity is installed, the IC's state-of-charge map no longer matches the actual voltage curve. The tablet interprets a voltage drop under combined display and Wi-Fi load as a critically low charge — and shuts down. One complete discharge-to-shutoff followed by an uninterrupted charge to 100% realigns the gauge. After that cycle, reported percentage tracks actual cell voltage correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAndroid reporting wrong battery percentage after the swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe percentage shown in Android pulls from the fuel gauge IC, not the cell directly. That IC holds learned data from the original battery — cell impedance, capacity endpoints, and voltage-to-percentage mapping. A new cell has different characteristics, so the old data produces inaccurate readings right away. Drain the tablet fully until it powers off on its own, then charge to 100% without interruption. That recalibration cycle writes fresh endpoint data to the gauge and corrects the display.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43425896824922,"sku":"BWCS-ACB320SL-1","price":41.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43425896857690,"sku":"BWCS-ACB320SL-2","price":48.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43425896890458,"sku":"BWCS-ACB320SL-3","price":53.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ACB320SL-1.webp?v=1779930008","url":"https:\/\/batteryweb.com\/products\/acer-iconia-one-10-b3-a20-replacement-battery-37v-5700mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}