{"product_id":"yingtai-t11-replacement-battery-37v-900mah-li-ion","title":"Yingtai T11 Replacement Battery 3.7V 900mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eYingtai T11 \/ T15 — 3.7V Li-ion 900mAh Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 900mAh Li-ion cell replaces the original battery in the Yingtai T11 and T15 smartphones. Both models share the same battery bay dimensions (53.00 x 34.00 x 4.30mm) and voltage rail, so one SKU covers both. Capacity figures come from the product specification — 900mAh \/ 3.33Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eT11 and T15 shared battery platform:\u003c\/strong\u003e\n    Both handsets run the same 3.7V single-cell architecture with identical connector orientation and board contact spacing. Swapping between models carries no BMS handshake difference — the charge IC behaves identically on both.\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 a calibrated rig. The BMS held cutoff correctly at the low-voltage threshold and did not trip prematurely under modem-active load spikes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after installation:\u003c\/strong\u003e\n    On first use, disable fast charging and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before any high-current protocol pushes charge into an uncalibrated state — percentage accuracy improves significantly after that single cycle.\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 replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh cell has a steeper voltage drop near the bottom of its discharge curve than the worn cell the phone's fuel gauge was calibrated against. When the modem fires a high-power transmission burst or the screen brightness spikes, the cell voltage dips below the BMS cutoff threshold — even though the percentage reading says 25%. The phone interprets this as a hard fault and shuts down. One full discharge-to-charge cycle recalibrates the coulomb counter and brings the cutoff threshold back in line with actual remaining capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage. If the cell drops below approximately 2.5V, the BMS enters a lockout state to prevent damage — the phone shows nothing when you press the power button. Connect the device to a low-current charger (a standard 5V USB wall adapter works) and leave it for 20–30 minutes without pressing power. The BMS needs a trickle current to recover the cell voltage above its reactivation threshold before normal charging and boot can proceed. Once the charging indicator appears on screen, the BMS has exited lockout — charge to full before first use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404330303578,"sku":"BWCS-EAC140SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404330336346,"sku":"BWCS-EAC140SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404330369114,"sku":"BWCS-EAC140SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EAC140SL-1.webp?v=1779369761","url":"https:\/\/batteryweb.com\/products\/yingtai-t11-replacement-battery-37v-900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}