{"product_id":"meizu-m6s-replacement-battery-385v-2900mah-li-polymer","title":"Meizu BA712 M6s Replacement Battery 3.85V 2900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMeiZu M6s — 3.85V Li-Polymer Replacement Battery (BA712)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 2900mAh Li-Polymer replacement cell for the MeiZu M6s smartphone. It fits the M6s, M6s Premium Edition, M6s Premium Edition Dual SIM TD-LTE, and M712Q-B, among other variants that share the BA712 specification. Swap it in when the original cell no longer holds a usable charge across a full day of normal use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM6s variant compatibility:\u003c\/strong\u003e\n    All listed M6s models share the same battery bay dimensions, connector pinout, and BMS handshake. The BA712 part number spans the standard and Premium Edition lines because Meizu used a single battery platform across this range without altering the protection circuit or cell footprint.\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 the M6s platform and confirmed the BMS communicates correctly with the charge IC — no false full-charge flags, no premature cutoff at the low end of the discharge curve.\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 for one complete discharge-charge cycle. This lets the fuel gauge IC build an accurate discharge curve map against the new cell before high-current charging pushes into an uncalibrated state.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the M6s reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe M6s uses a coulomb counter inside the fuel gauge IC to track charge state. When you install a new cell, the IC still holds the old cell's discharge curve in memory. It reads the new cell's voltage and maps it to the wrong capacity point, which is why the percentage displayed is off — sometimes by 15–20 percent. One full discharge to auto-shutoff followed by a complete charge to 100 percent forces the IC to relearn the curve against the actual cell chemistry. After that cycle, percentage reporting stabilises.\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 happens when the fuel gauge IC hasn't yet calibrated to the new cell's voltage-to-capacity curve. The cell voltage drops sharply under modem or display load at a point the IC still thinks is safe, and the BMS trips before the displayed percentage reaches zero. It is not a faulty cell — it is a calibration gap. Run one complete discharge cycle without fast charging, let the phone shut off naturally, then charge uninterrupted to 100 percent. After that cycle, the cutoff threshold aligns correctly and the phone no longer drops out above 3.6V under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392022282330,"sku":"BWCS-MX712SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392022315098,"sku":"BWCS-MX712SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392022347866,"sku":"BWCS-MX712SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MX712SL-1.webp?v=1779142963","url":"https:\/\/batteryweb.com\/products\/meizu-m6s-replacement-battery-385v-2900mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}