{"product_id":"alcatel-ot-c123-replacement-battery-37v-450mah-li-ion","title":"Alcatel OT-C123 V1 Replacement Battery 3.7V 450mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAlcatel OT-C123 \/ OT-C123A — 3.7V Li-ion Replacement Battery (V1)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V Li-ion cell rated at 450mAh (1.67Wh), built to the V1 specification for the Alcatel OT-C123 and OT-C123A. It replaces the original cell when the phone no longer holds charge, shuts down unexpectedly, or fails to power on. Physical dimensions are 41.00 × 34.50 × 4.20mm — measure your original before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOT-C123 and OT-C123A compatibility:\u003c\/strong\u003e\n    Both variants share the same battery bay geometry, connector pinout, and BMS handshake protocol. One V1-spec cell covers both models 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-C123 platform. The BMS accepted the charge handshake cleanly on the first cycle and held cutoff voltage within spec at both ends of the curve.\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 if your charger supports it and run one complete discharge-to-charge cycle. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging begins — otherwise percentage readings can drift or jump early in the battery's life.\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 OT-C123 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh Li-ion cell has a steeper voltage cliff than a broken-in cell. When the phone's modem fires a high-current burst — during a call or data transfer — the new cell's terminal voltage drops sharply under load. The fuel gauge IC reads that drop as a critically low state and triggers an emergency shutdown, even though the percentage display was showing 25% a moment earlier. Run two full discharge-charge cycles without fast charging; the fuel gauge IC recalibrates its model against the actual cell curve and the premature shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOT-C123 won't power on after sitting in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge over time. If the OT-C123 sat unused for several months, the cell voltage may have dropped below 2.5V — the threshold where the BMS locks out to prevent damage. The phone will show nothing when you press the power button, and a standard charger may not trigger a charge cycle because the BMS is blocking current. Connect the phone to a low-current USB source (a PC port, not a wall adapter) for 15–20 minutes; this trickle is enough to bring the cell above 3.0V, at which point the BMS re-initialises and normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405073154138,"sku":"BWCS-OTC123SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405073186906,"sku":"BWCS-OTC123SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405073219674,"sku":"BWCS-OTC123SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-OTC123SL-1.webp?v=1779369920","url":"https:\/\/batteryweb.com\/products\/alcatel-ot-c123-replacement-battery-37v-450mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}