{"product_id":"huawei-matepad-pro-replacement-battery-38v-7150mah-li-polymer","title":"Huawei MatePad Pro HB27D8C8ECW-12 3.8V 7150mAh Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHuawei MatePad Pro — 3.8V Li-Polymer Replacement Battery (HB27D8C8ECW-12)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 7150mAh Li-Polymer replacement battery for the Huawei MatePad Pro. It fits models MRX-AL09, MRX-AL19, and MRX-W09. It slots in where the original HB27D8C8ECW-12 cell sat before capacity degraded from repeated charge cycles.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMatePad Pro MRX series coverage:\u003c\/strong\u003e\n    The AL09, AL19, and W09 variants share the same battery bay geometry, connector pinout, and BMS handshake protocol — one cell fits all three 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 discharge on a MatePad Pro unit. The BMS accepted the cell without fault flags, charge IC ramped normally, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge reset after installation:\u003c\/strong\u003e\n    After fitting, run the tablet down to automatic shutoff, then charge uninterrupted to 100% without using the device. This forces the fuel gauge IC to recalibrate against the new cell's actual capacity curve and clears the inaccurate percentage readings that almost always appear after a swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMatePad Pro shutting down at 15–25% remaining after battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still calibrated to the old cell's voltage-to-capacity curve. When display brightness, WiFi, and active apps pull load simultaneously, voltage drops faster than the gauge expects — the BMS reads it as a critical low and cuts power prematurely. The fix is one full recalibration cycle: discharge to automatic shutdown, then a full uninterrupted charge to 100%. After that cycle the gauge maps correctly to the new cell and the early shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFast charging unavailable on MatePad Pro after battery replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eHuawei's proprietary fast charge protocol requires a handshake between the charger and the charge IC. On first use after a swap, the system may default to standard 5V charging while it completes that negotiation cycle. Use the original Huawei SuperCharge adapter — third-party USB-PD chargers will not trigger the fast charge handshake. If fast charge still does not activate after one full charge cycle with the OEM adapter, reseat the battery connector and confirm it is fully latched before trying again.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43425838923866,"sku":"BWCS-HUP190SL-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43425838956634,"sku":"BWCS-HUP190SL-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43425838989402,"sku":"BWCS-HUP190SL-3","price":50.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HUP190SL-1.webp?v=1779929902","url":"https:\/\/batteryweb.com\/products\/huawei-matepad-pro-replacement-battery-38v-7150mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}