{"product_id":"acer-liquid-s2-replacement-battery-38v-3000mah-li-polymer","title":"Acer BAT-M10 Liquid S2 Replacement Battery 3.8V 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAcer Liquid S2 \/ S520 — 3.8V Li-Polymer Replacement Battery (BAT-M10)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 3000mAh Li-Polymer replacement battery for the Acer Liquid S2, S520, Liquid Jade S2, and S58A smartphones. It matches OEM part numbers BAT-M10 and KT.0010S.007. Physical dimensions are 96.86 × 56.66 × 4.35 mm — confirm these against your existing cell before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLiquid S2 and S520 platform fit:\u003c\/strong\u003e\n    These models share the same battery bay geometry, connector pinout, and BMS handshake protocol. One cell covers the full range listed 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 Liquid S2 platform. The BMS accepted the cell, reported state-of-charge correctly after one full cycle, and thermal cutoff triggered within spec under sustained load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before any high-current charge session pushes current into an uncalibrated cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Liquid S2 after cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell has a slightly different voltage-versus-capacity curve than the aged cell the fuel gauge IC was calibrated against. When the modem fires or the screen brightness spikes, current draw pulls cell voltage down sharply — crossing the BMS undervoltage cutoff even though the OS still shows charge remaining. The device shuts off to protect the cell. One full discharge-charge cycle at standard rate resets the coulomb counter and aligns the fuel gauge to the new cell's actual curve. After that cycle, shutdowns at 20–30% stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone not powering on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge in storage. If the cell voltage drops below approximately 2.5V, the BMS enters lockout mode and blocks all charge current to prevent damage. A standard charger will appear to do nothing — no charging indicator, no response. To recover the cell, connect the phone to a known-good wall adapter and leave it undisturbed for 15–30 minutes. The charge IC trickle-charges the cell at a low current rate to bring voltage back above the BMS re-enable threshold, typically around 3.0V, before resuming normal charging.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404159647834,"sku":"BWCS-ACS520SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404159680602,"sku":"BWCS-ACS520SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404159713370,"sku":"BWCS-ACS520SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ACS520SL-1.webp?v=1779369251","url":"https:\/\/batteryweb.com\/products\/acer-liquid-s2-replacement-battery-38v-3000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}