{"product_id":"xiaomi-air-125-replacement-battery-76v-4800mah-li-polymer","title":"Xiaomi Air 12.5 Replacement Battery 7.6V 4800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eXiaomi Air 12.5 — 7.6V Li-Polymer Replacement Battery (161201-01)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.6V, 4800mAh (36.48Wh) Li-Polymer replacement battery for the Xiaomi Air 12.5 tablet. It replaces OEM parts 161201-01, 161201-AA, 161201-AQ, and R10B01W. Fit this battery when the original no longer holds a charge or the tablet shuts down unexpectedly at partial capacity.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAir 12.5 fit:\u003c\/strong\u003e\n    The Air 12.5 uses a slim Li-Polymer cell with a specific connector orientation and BMS handshake tied to Xiaomi's fuel gauge IC. This replacement matches the cell dimensions (253.94 × 126.58 × 5.92mm), voltage rail, and connector so the battery registers correctly with the system board.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through charge and discharge on the Air 12.5 platform. The BMS accepted the cell without fault flags, and the charge IC stepped through trickle, constant-current, and constant-voltage phases cleanly with no cutoff errors.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after install:\u003c\/strong\u003e\n    After fitting this battery, run one full discharge to automatic shutoff, then charge uninterrupted to 100%. This gives the fuel gauge IC a complete data set against the new cell and clears inaccurate percentage readings that commonly 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\"\u003eXiaomi Air 12.5 shutting down at 15–25% remaining\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the display backlight and Wi-Fi radio draw simultaneously pull voltage below the BMS cutoff threshold before the fuel gauge reaches 0%. The old cell's degraded curve taught the fuel gauge to expect a slower voltage drop, so the new cell's steeper cliff catches the system off guard. One full discharge-to-shutoff cycle recalibrates that curve. After the cycle, the OS percentage and the actual cell voltage align again.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFast charging not available after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Air 12.5 charge controller uses a USB-PD negotiation sequence that only unlocks higher wattage after one accepted full charge cycle on a new cell. Until that first cycle completes, the system defaults to standard 5V charging as a precaution. Plug into the original Xiaomi charger and let the tablet charge uninterrupted from near-empty to 100% without interruption. Fast charge should re-engage on the next session once that handshake is established.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43425838596186,"sku":"BWCS-MUP125SL-1","price":60.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43425838628954,"sku":"BWCS-MUP125SL-2","price":70.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43425838661722,"sku":"BWCS-MUP125SL-3","price":78.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MUP125SL-1.webp?v=1779929929","url":"https:\/\/batteryweb.com\/products\/xiaomi-air-125-replacement-battery-76v-4800mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}