{"product_id":"alcatel-ot-600a-replacement-battery-37v-700mah-li-ion","title":"Alcatel OT-BY20 Replacement Battery 3.7V 700mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAlcatel OT-600A \/ OT-383A Series — 3.7V Li-ion Replacement Battery (OT-BY20)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 700mAh Li-ion cell replacing OEM part OT-BY20 and its variants (CAB30M0000C1, CAB2170000C1, B-U8C). It fits the Alcatel OT-600A, OT-383A, OT-206, OT-355D, and over 113 additional models sharing the same battery bay and connector. Dimensions are 46.60 × 33.90 × 4.70mm — verify against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWide model compatibility across the OT series:\u003c\/strong\u003e\n    These Alcatel models share a common battery bay geometry, connector pinout, and 3.7V nominal voltage rail. The same cell and BMS handshake protocol covers the full list, so one part number covers the range without firmware conflicts.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full discharge and recharge on OT-series hardware. The BMS responded correctly to charge termination and low-voltage cutoff — no false triggers and no thermal event during the charge-in phase.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    On first use after fitting, run one complete discharge to auto-off, then charge uninterrupted to full. This gives the phone's fuel gauge IC a clean reference curve against the new cell — skipping this step causes the percentage counter to report stale data from the old cell's discharge profile.\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-600A reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eAlcatel's OT-series phones use a coulomb-counting fuel gauge IC that builds its state-of-charge model from accumulated cycle data on the original cell. When you fit a new cell, the IC still references the old cell's internal resistance and discharge curve. The result is percentage readings that drift or freeze — often showing 80% then jumping straight to shutdown. One full uninterrupted discharge-charge cycle forces the IC to write a new baseline. After that cycle, the percentage counter tracks the new cell accurately.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops sharply under load — specifically during modem activity or screen-on states — even though the displayed percentage suggests capacity remains. At 700mAh, the OT-600A's cell is small, and a minor increase in internal resistance causes voltage to sag below the BMS cutoff threshold before the fuel gauge IC registers empty. If the phone was stored discharged for weeks before the swap, the first two cycles may show this behaviour until the cell stabilises. Check resting voltage after a full charge — it should read 4.15–4.20V; anything below 4.10V after a full charge cycle indicates a conditioning issue.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405052051546,"sku":"BWCS-OT383SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405052084314,"sku":"BWCS-OT383SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405052117082,"sku":"BWCS-OT383SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-OT383SL-1.webp?v=1779369883","url":"https:\/\/batteryweb.com\/products\/alcatel-ot-600a-replacement-battery-37v-700mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}