{"product_id":"t-mobile-blade-replacement-battery-37v-1300mah-li-ion","title":"T-Mobile Blade Li3712T42P3h444865 Compatible Battery 3.7V 1300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eT-Mobile Blade — 3.7V Li-ion Replacement Battery (Li3712T42P3h444865)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1300mAh (4.81Wh) lithium-ion cell for the T-Mobile Blade smartphone. It replaces OEM part numbers Li3712T42P3h444865 and Li3713T42P3h444865. If your Blade is shutting down unexpectedly or no longer holding a charge, this is the direct cell swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eT-Mobile Blade compatibility:\u003c\/strong\u003e\n    Both Li3712T42P3h444865 and Li3713T42P3h444865 share the same 3.7V rail, connector pinout, and physical footprint — 43.50 × 47.00 × 6.10mm. Either OEM part number installs 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 Blade platform. The BMS handshook correctly, charge termination triggered at 4.2V, and no overcurrent trips occurred during screen-on and modem load testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fuel gauge reset:\u003c\/strong\u003e\n    After installing this cell, disable fast charging and run one complete discharge down to automatic shutoff, then charge to 100% uninterrupted. This lets the fuel gauge IC map the new cell's discharge curve before it resumes high-current charging cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the T-Mobile Blade reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Blade's fuel gauge IC stores a charge curve learned from the original cell. When a new cell goes in, the IC still references the old curve, so the percentage readout drifts — often showing full charge while the actual cell voltage is lower. This causes the phone to report 30% and then shut off without warning. One full discharge-to-shutdown followed by a complete uninterrupted charge forces the coulomb counter to re-anchor to the new cell's actual capacity. After that cycle, percentage accuracy normalises.\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 is a voltage cliff issue, not a capacity problem. Under combined modem radio and display load, the cell voltage drops sharply below what the protection circuit allows — even when the reported percentage still looks safe. Fresh lithium-ion cells can show this on early cycles before the internal resistance stabilises. Run two or three full discharge-charge cycles without heavy simultaneous use, and check that cell voltage under load stays above 3.4V at the point of shutdown.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405093732442,"sku":"BWCS-ZTE950SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405093765210,"sku":"BWCS-ZTE950SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405093797978,"sku":"BWCS-ZTE950SL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTE950SL-1.webp?v=1779369970","url":"https:\/\/batteryweb.com\/products\/t-mobile-blade-replacement-battery-37v-1300mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}