{"product_id":"alcatel-one-touch-pop-s3-replacement-battery-38v-2100mah-li-ion","title":"Alcatel One Touch POP S3 TLp020A2 Replacement Battery 3.8V 2100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAlcatel One Touch POP S3 \/ OT-5050 Series — 3.8V Li-ion Replacement Battery (TLp020A2)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 2100mAh Li-ion battery for the Alcatel One Touch POP S3 and OT-5050 series smartphones. It replaces OEM part numbers TLp020A2 and TLi020A1. It fits the OT-5050, OT-5050A, OT-5050Y, and related variants where the original cell has degraded or failed.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOT-5050 series fit:\u003c\/strong\u003e\n    The OT-5050, OT-5050A, and OT-5050Y share the same battery bay dimensions, connector pinout, and BMS handshake. All run off the same 3.8V nominal rail, so one cell covers the full variant range 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 OT-5050 platform and confirmed the BMS accepted the new cell without fault codes, held charge cutoff at 4.2V, and triggered low-voltage protection at the correct threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first install:\u003c\/strong\u003e\n    After fitting this battery, run one complete discharge down to auto-shutdown, then charge uninterrupted to 100% before normal use. The phone's fuel gauge IC is calibrated to the old cell's discharge curve — this full cycle resets the coulomb counter against the new cell so percentage readings stay accurate.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the OT-5050 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe OT-5050 uses a fuel gauge IC that tracks charge by counting coulombs against a learned discharge curve from the original cell. When you swap in a new cell, the IC has no reference data for its actual voltage-to-capacity curve. It maps voltage readings against the old curve, so the percentage shown on screen can be several points off — often reading high early in the discharge and then dropping sharply. One full discharge-charge cycle gives the fuel gauge IC enough data to recalibrate. After that cycle, percentage accuracy returns to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% remaining on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't completed recalibration and the cell voltage drops below the modem's minimum operating voltage under load — even though the displayed percentage still looks safe. The modem and screen together draw enough current to cause a voltage sag that triggers the protection circuit, cutting power instantly. It's not a faulty cell — it's a calibration gap. Run one full discharge to auto-shutdown, recharge to 100%, and the coulomb counter will reset. After that cycle, the shutdown threshold and displayed percentage will align correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404202508378,"sku":"BWCS-OTS300SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404202541146,"sku":"BWCS-OTS300SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404202573914,"sku":"BWCS-OTS300SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-OTS300SL-1.webp?v=1779369370","url":"https:\/\/batteryweb.com\/products\/alcatel-one-touch-pop-s3-replacement-battery-38v-2100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}