{"product_id":"huawei-mediapad-m5-replacement-battery-385v-7300mah-li-polymer","title":"Huawei MediaPad M5 Replacement Battery HB299418ECW 7300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHuawei MediaPad M5 — 3.85V Li-Polymer Replacement Battery (HB299418ECW)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 7300mAh (28.11Wh) lithium-polymer battery for the Huawei MediaPad M5 and MediaPad M5 10.8, covering CMR-AL09 and CMR-AL19 variants. It replaces OEM part HB299418ECW directly. Fit this when the original cell no longer holds a full charge or the tablet shuts down unexpectedly under load.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMediaPad M5 and M5 10.8 compatibility:\u003c\/strong\u003e\n    Both the 8.4-inch and 10.8-inch M5 variants use the same HB299418ECW cell, same connector, and the same charge-management IC handshake. One replacement covers all listed model codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the M5 platform. The BMS accepted the charge IC handshake without error flags, and cell voltage held stable across display-on and WiFi-active load states.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    After fitting, run the tablet down to automatic shutoff — do not force it off — then charge uninterrupted to 100%. This resets the fuel gauge IC against the new cell's actual capacity curve and clears the inaccurate percentage readings that 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\"\u003eTablet shutting down at 15–25% remaining after battery replacement\u003c\/h3\u003e\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 the new cell hits a voltage point the IC previously mapped to near-empty, it triggers a shutdown — even though real charge remains. The fix is one full discharge-to-shutoff followed by an uninterrupted charge to 100%. After that cycle, the IC re-anchors its calibration to the new cell, and shutdowns at false percentages stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFast charging not available after fitting the new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eHuawei's SuperCharge protocol requires a completed charge cycle before the charge controller unlocks higher current delivery on a new cell. Immediately after swap, the tablet may only accept standard 5V input. Plug in the original Huawei charger — third-party adapters often fail USB-PD negotiation on this platform — and allow one full charge cycle to complete. SuperCharge should activate on the next session once the controller has accepted the cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43425845674074,"sku":"BWCS-HUM500SL-1","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43425845706842,"sku":"BWCS-HUM500SL-2","price":49.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43425845739610,"sku":"BWCS-HUM500SL-3","price":54.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HUM500SL-1.webp?v=1779929950","url":"https:\/\/batteryweb.com\/products\/huawei-mediapad-m5-replacement-battery-385v-7300mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}