{"product_id":"alcatel-ot-800-replacement-battery-37v-800mah-li-ion","title":"CAB3CP000CA1 Alcatel OT-800 Replacement Battery 3.7V 800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAlcatel OT-800 Series — 3.7V Li-ion Replacement Battery (CAB3CP000CA1)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 800mAh Li-ion cell replaces the original battery in the Alcatel OT-800, OT-800A, Tribe, and VM800, along with 24 additional compatible models. It is a direct fit for owners keeping these compact candybar-style phones in service. Capacity is rated at 2.96Wh, matching the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOT-800 series fit:\u003c\/strong\u003e\n    The OT-800, OT-800A, Tribe, and VM800 all share the same battery bay dimensions, connector pinout, and 3.7V nominal voltage rail. One cell covers the full group 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-800 platform. The BMS accepted the charge IC handshake on the first connection and held the voltage curve within spec through a full discharge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration tip:\u003c\/strong\u003e\n    On first use after installation, run one complete discharge-charge cycle before relying on the percentage readout. The fuel gauge IC is calibrated to the old cell's discharge curve — one full cycle lets it remap against the new cell and return accurate readings.\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-800 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe OT-800 uses a fuel gauge IC that tracks capacity by mapping voltage against a stored discharge curve from the original cell. A new cell has a slightly different internal resistance and discharge profile. Until the IC sees one complete cycle with the new cell, it reads percentage against the old map. This causes the display to jump, stall, or read 100% while the phone is still near full charge — not a fault in the battery itself.\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 — typically during a screen-on burst or a background process spike. The phone's protection circuit cuts power to prevent going below the BMS floor, which is usually around 3.0V under load. The percentage shown on screen doesn't account for that voltage cliff, so the shutdown looks premature. Run a full discharge-charge cycle to let the fuel gauge IC recalibrate its low-voltage threshold mapping against the new cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405134397530,"sku":"BWCS-OT800SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405134430298,"sku":"BWCS-OT800SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405134463066,"sku":"BWCS-OT800SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-OT800SL-1.webp?v=1779370279","url":"https:\/\/batteryweb.com\/products\/alcatel-ot-800-replacement-battery-37v-800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}