{"product_id":"meizu-meilan-16x-replacement-battery-385v-2900mah-li-polymer","title":"MeiZu Meilan 16X BA872 Replacement Battery 3.85V 2900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMeiZu Meilan 16X \/ M1872 \/ M872H \/ M872Q — 3.85V Li-Polymer Replacement Battery (BA872)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThe BA872 is a 3.85V, 2900mAh Li-Polymer cell that replaces the original battery in the MeiZu Meilan 16X (also sold as M1872, M872H, and M872Q). It matches the OEM voltage rail and connector pinout for the fuel gauge IC and charge circuit. Capacity is 2900mAh (11.17Wh) — identical to the factory spec.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMeilan 16X model variants (M1872, M872H, M872Q):\u003c\/strong\u003e\n    These four model codes share the same battery bay dimensions, connector layout, and BMS handshake protocol. The BA872 footprint is 80.00 × 60.40 × 3.50mm — the cell fits without modification across all variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the BA872 through a full charge cycle on the Meilan 16X platform and confirmed BMS handshake, charge termination at 4.35V, and fuel gauge IC response across three consecutive cycles. No abnormal heat events on the charge IC were recorded.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fast charge protocol:\u003c\/strong\u003e\n    On first use after installation, disable MeiZu's fast charging for one complete discharge-charge cycle. The fuel gauge IC needs to map the new cell's discharge curve before high-current charging is applied to an uncalibrated cell — skipping this step can cause early percentage jumps.\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 Meilan 16X after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Meilan 16X uses a coulomb counter fuel gauge that was calibrated to the discharge curve of the original aged cell. A fresh BA872 cell has a steeper voltage drop under modem and display load than the old degraded cell the IC was tracking. When voltage sags below the BMS cutoff threshold — typically around 3.4–3.5V under peak load — the phone shuts down even though the percentage reads higher. One full uninterrupted discharge-charge cycle resets the fuel gauge baseline and eliminates the premature cutoff in most cases.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD or proprietary fast charge not activating after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eMeiZu's fast charge protocol negotiates between the charge IC on the board and the BMS inside the battery pack. On the first cycle after installing a new BA872, the BMS may not complete the handshake on the first connection, causing the charger to fall back to standard 5V input. This is not a fault — the BMS initialises fully after one standard charge completes. Reconnect the charger after the first full cycle and fast charge will negotiate correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391991677018,"sku":"BWCS-MX872SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391991709786,"sku":"BWCS-MX872SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391991742554,"sku":"BWCS-MX872SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MX872SL-1.webp?v=1779142762","url":"https:\/\/batteryweb.com\/products\/meizu-meilan-16x-replacement-battery-385v-2900mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}