{"product_id":"alba-acse2g-replacement-battery-37v-1200mah-li-ion","title":"ALBA ACSE2G Compatible Battery 3.7V 1200mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eALBA ACSE2G — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 1200mAh Li-ion cell for the ALBA ACSE2G smartphone. It slots directly into the ACSE2G handset and restores calling, messaging, and app functionality lost to a degraded original cell. No OEM part number exists for this unit — the ACSE2G and cell dimensions (53.00 × 33.90 × 5.70mm) are the fit references.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eACSE2G cell fit:\u003c\/strong\u003e\n    The ACSE2G uses a compact 3.7V single-cell architecture with a low-current BMS matched to the phone's charge IC. Any replacement cell must match the connector pinout and physical envelope — this cell does both.\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 a 3.7V single-cell rig, confirmed BMS communication with the charge IC, and verified the protection circuit tripped correctly at low-voltage cutoff without locking the device out.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle recalibration on the ACSE2G:\u003c\/strong\u003e\n    On first use after installation, disable fast charging if your charger supports it and run one full discharge down to auto-off, then charge uninterrupted to 100%. The ACSE2G's fuel gauge IC was calibrated to the old cell's discharge curve — one complete cycle rewrites that reference against the new 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 ACSE2G after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ACSE2G's fuel gauge IC holds a learned discharge curve from the old cell. When a new cell goes in, the IC still references the old curve and misjudges the voltage cliff — the point where cell voltage drops sharply under modem or screen load. The phone reads 25% but the cell voltage has already fallen below what the SoC needs to stay on. One full discharge-to-cutoff and uninterrupted recharge resets the coulomb counter and resolves this.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eACSE2G not powering on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage, and if this one dropped below roughly 2.5V per cell, the BMS will have locked out to prevent damage — the phone won't respond to the power button or show a charge indicator. Connect the phone to a wall adapter, not a PC port, and leave it for 15–20 minutes without pressing anything. The charge IC will push a trickle current to bring the cell above the BMS re-enable threshold, typically around 2.9V, after which the device will boot normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404141461594,"sku":"BWCS-AVC120SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404141494362,"sku":"BWCS-AVC120SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404141527130,"sku":"BWCS-AVC120SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AVC120SL-1.webp?v=1779369080","url":"https:\/\/batteryweb.com\/products\/alba-acse2g-replacement-battery-37v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}