{"product_id":"huawei-m750-replacement-battery-37v-1100mah-li-ion","title":"Huawei M750 Replacement Battery HB5A2H 3.7V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHuawei M750 \/ U7519 Series — 3.7V Li-ion Replacement Battery (HB5A2H)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1100mAh Li-ion replacement battery for the Huawei M750, U7519, M228, C8000, and related models. It uses OEM part number HB5A2H (also cross-referenced as BTR7519). Physical dimensions are 54.05 × 34.10 × 5.40mm — measure your existing cell before ordering if you are unsure which variant you have.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM750 \/ U7519 platform fit:\u003c\/strong\u003e\n    These models share the same 3.7V single-cell architecture, physical footprint, and connector orientation. The BMS handshake on each device expects the same charge termination voltage, so one cell revision covers the full compatibility list 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 load on the M750 platform. The BMS accepted the cell on first insertion, charge termination triggered correctly at 4.2V, and protection cutoff activated as expected under a simulated low-voltage discharge.\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 and run one full discharge-to-charge cycle. The fuel gauge IC in these devices calibrates against the cell's discharge curve — skipping this step causes the percentage counter to drift against the new cell's actual capacity.\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 M750 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff failure, not a capacity problem. The fuel gauge IC still holds the discharge curve from the old, degraded cell and predicts remaining charge incorrectly. When the modem fires a high-current burst — during a call or data sync — the new cell's actual voltage drops below the shutdown threshold before the percentage counter reaches zero. One full discharge cycle from 100% to automatic power-off, followed by a full charge, gives the coulomb counter enough data to rebuild an accurate curve against the replacement cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice not powering on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage. If the cell voltage has dropped below approximately 2.5V, the BMS enters lockout mode and will not pass current to the device — the phone shows no sign of life even on charge. Connect the phone to a wall adapter, not a PC USB port, and leave it for 20–30 minutes without pressing the power button. The charge IC needs sustained input voltage to trickle the cell above the BMS re-enable threshold of around 2.9V before normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405088456794,"sku":"BWCS-HUM750XL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405088489562,"sku":"BWCS-HUM750XL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405088522330,"sku":"BWCS-HUM750XL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HUM750XL-1.webp?v=1779369956","url":"https:\/\/batteryweb.com\/products\/huawei-m750-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}