{"product_id":"meizu-meilan-max-replacement-battery-385v-4100mah-li-polymer","title":"MeiZu BS25 Meilan Max Replacement Battery 3.85V 4100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMeiZu Meilan Max \/ M3 Max — 3.85V Li-Polymer Replacement Battery (BS25)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThe BS25 is a 3.85V, 4100mAh Li-Polymer cell that fits the MeiZu Meilan Max, M3 Max, S685Q, and S685Q Dual SIM TD-LTE. It replaces the original battery when the device no longer holds charge or shuts down unexpectedly. Dimensions are 88.50 × 68.60 × 3.80 mm — measure your original before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMeilan Max and M3 Max platform fit:\u003c\/strong\u003e\n    These models share the same internal battery bay dimensions, connector pinout, and BMS handshake protocol, which is why a single BS25 cell covers the full S685Q range including Dual SIM and TD-LTE variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled the BS25 through full charge and discharge on the Meilan Max platform. The BMS accepted charge normally, protection cutoffs triggered correctly at the low-voltage threshold, and the cell held stable voltage under sustained screen and modem load.\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 complete discharge-charge cycle at standard rate. This lets the fuel gauge IC recalibrate against the new cell's discharge curve 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\"\u003eSudden shutdown at 20–30% on the BS25 replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still mapped to the old cell's discharge curve. The new cell hits a voltage cliff under modem or display load at a point the gauge reads as 20–30% remaining. The phone interprets the voltage drop as a fault and cuts power before the gauge reaches zero. Run one full discharge to auto-shutdown, then charge uninterrupted to 100% — this resets the coulomb counter against the actual cell curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charge not accepted on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge cycle, the charge IC may reject the fast-charge handshake because the BMS presents an unfamiliar impedance profile from a new, uncycled cell. The phone defaults to standard 5V charging as a protection measure. Charge fully once at standard rate, disconnect, then reconnect — on the second cycle the charge IC typically negotiates fast charge correctly. If it still fails, check the cable and adapter separately before assuming a BMS fault.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392092143706,"sku":"BWCS-MX685SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392092176474,"sku":"BWCS-MX685SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392092209242,"sku":"BWCS-MX685SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MX685SL-1.webp?v=1779143707","url":"https:\/\/batteryweb.com\/products\/meizu-meilan-max-replacement-battery-385v-4100mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}