{"product_id":"alcatel-ot-975-replacement-battery-37v-1650mah-li-ion","title":"Alcatel TLi015A1 Replacement Battery 3.7V 1650mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAlcatel OT-975 \/ One Touch 975 Series — 3.7V Li-ion Replacement Battery (TLi015A1)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1650mAh Li-ion replacement battery for the Alcatel OT-975, OT-975N, One Touch 975, and One Touch 975N smartphones. It carries OEM part number TLi015A1 and matches the original cell's physical dimensions at 51.83 x 50.78 x 5.41mm. Swap it in when the original cell no longer holds a charge or causes unexpected shutdowns.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOT-975 and One Touch 975 compatibility:\u003c\/strong\u003e\n    The OT-975 and its 975N variant share the same battery bay dimensions, connector pinout, and BMS handshake — all four models use TLi015A1 interchangeably 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 full charge and discharge on the OT-975 platform. The BMS accepted charge immediately, voltage held steady through screen and modem load, and protection circuits tripped correctly at both overvoltage and undervoltage thresholds.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installing this cell, run one complete discharge-charge cycle with fast charging disabled. This gives the phone's fuel gauge IC time to map the new cell's discharge curve before high-current charging pushes into an uncalibrated state — which is the direct cause of erratic percentage jumps after a cell swap.\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-975 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage-cliff issue, not a capacity problem. When the modem fires during a call or data burst, current draw spikes sharply — if the cell voltage sags below the BMS cutoff threshold under that load, the phone cuts out even though the fuel gauge still reads 20–30%. The fuel gauge IC was calibrated to the old cell's internal resistance curve, so it misreads how much charge is actually left. One full discharge-charge cycle without fast charging lets the coulomb counter reset against the new cell and the shutdowns stop. After that cycle, charge normally to 4.2V.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOT-975 showing wrong battery percentage after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe phone's fuel gauge IC stores a learned model of the original cell's discharge curve. A new cell has different internal resistance, so the IC reads voltage against the wrong model and reports an inaccurate percentage — often jumping several points at once. This is not a fault with the replacement cell. Discharge the phone to automatic shutdown, then charge uninterrupted to 100% with the screen off. After one full cycle the IC recalibrates, and percentage reporting stabilises.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404255461466,"sku":"BWCS-OT975XL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404255494234,"sku":"BWCS-OT975XL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404255527002,"sku":"BWCS-OT975XL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-OT975XL-1.webp?v=1779369511","url":"https:\/\/batteryweb.com\/products\/alcatel-ot-975-replacement-battery-37v-1650mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}