{"product_id":"alcatel-ot-2038x-replacement-battery-37v-950mah-li-ion","title":"Alcatel TLI009AA OT-2038X Replacement Battery 3.7V 950mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAlcatel OT-2038X \/ OT-3025 Series — 3.7V Li-ion Replacement Battery (TLI009AA)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 950mAh Li-ion cell that replaces the TLI009AA battery in the Alcatel OT-2038X, OT-2053D, OT-2053X, OT-3025, and four additional compatible models. It restores power to devices that no longer hold a charge or fail to power on. Voltage and capacity match the original specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMulti-model fit — OT-2038X through OT-3025:\u003c\/strong\u003e\n    These models share the same 3.7V single-cell architecture, physical footprint (53.20 × 34.00 × 4.60mm), and connector pinout. The BMS handshake uses the same communication line, so one cell covers the full range without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on the OT-2038X platform. The BMS accepted the cell without fault codes, charge termination triggered correctly at 4.2V, and low-voltage cutoff engaged at the expected threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    Disable fast charging for the first complete discharge-charge cycle after installation. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — it prevents erratic percentage readings from the first hour of use.\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-2038X after cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still calibrated to the old cell's discharge curve. The new cell has a steeper voltage drop under load — when the modem or screen draws current, the cell voltage collapses below the cutoff threshold faster than the IC expects. The OS reads 25% but the actual cell voltage has already hit the shutdown floor. One full discharge-charge cycle resets the coulomb counter and aligns the reported percentage with real cell voltage.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone will not power on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage. If the cell voltage drops below approximately 2.5V, the BMS enters lockout mode to prevent damage — the phone shows nothing when you press the power button. Connect it to a wall charger, not a USB port, and leave it for 20–30 minutes without attempting to power on. Most BMS circuits will accept a trickle charge at that point and exit lockout once the cell climbs back above 3.0V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391779962970,"sku":"BWCS-OTL205SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391779995738,"sku":"BWCS-OTL205SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391780028506,"sku":"BWCS-OTL205SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-OTL205SL-1.webp?v=1779141909","url":"https:\/\/batteryweb.com\/products\/alcatel-ot-2038x-replacement-battery-37v-950mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}