{"product_id":"meizu-pro-7-replacement-battery-385v-2900mah-li-polymer","title":"MeiZu Pro 7 BA792 Replacement Battery 3.85V 2900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMeiZu Pro 7 \/ M792Q \/ M792C — 3.85V Li-Polymer Replacement Battery (BA792 \/ BA791)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 2900mAh Li-Polymer cell is a direct replacement for the MeiZu Pro 7 (M792Q, M792C). It fits the internal battery bay and connects to the same flex ribbon as the original BA792 and BA791 units. If the Pro 7 is shutting down early, charging slowly, or not holding charge between uses, the original cell has likely degraded past useful capacity.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePro 7 M792Q and M792C compatibility:\u003c\/strong\u003e\n    Both variants use the same 98.46 × 39.40 × 4.20mm footprint, identical connector tab placement, and share the same voltage rail. One cell covers both SKUs — no BMS handshake differences between them.\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 Pro 7 mainboard. The BMS accepted the cell without fault codes, and the charge IC stepped through trickle, CC, and CV phases as expected on a healthy cell.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    After installation, disable fast charging and run one full discharge-to-charge cycle before resuming normal use. The Pro 7's fuel gauge IC is calibrated to the old cell's discharge curve — skipping this step with fast charging active pushes current into an uncalibrated cell and leaves the percentage readout inaccurate for weeks.\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\"\u003eThis is a voltage cliff problem, not a capacity problem. Under modem or display load, the cell's internal resistance causes a voltage drop that crosses the BMS cutoff threshold — even though the fuel gauge still shows charge remaining. The fuel gauge IC hasn't yet mapped the new cell's discharge curve, so it reads percentage optimistically. Run two full discharge-charge cycles without fast charging to let the coulomb counter recalibrate, and the shutdowns will stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charging not working on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge after a cell swap, the Pro 7's charge IC defaults to a trickle or standard rate while it verifies cell impedance on the new unit. This is normal — the handshake between the charge controller and BMS requires at least one complete cycle before the fast charge protocol re-enables. Plug in with the standard charger, let the first charge complete to 100%, and fast charging will resume on the next session. Do not interrupt that first cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392048726106,"sku":"BWCS-MX700SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392048758874,"sku":"BWCS-MX700SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392048791642,"sku":"BWCS-MX700SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MX700SL-1.webp?v=1779143125","url":"https:\/\/batteryweb.com\/products\/meizu-pro-7-replacement-battery-385v-2900mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}