About this replacement
Xiaomi Mi Pad 2 — 3.8V Li-Polymer Replacement Battery (BM61)
The BM61 is a 3.8V, 6000mAh (22.8Wh) lithium-polymer replacement battery for the Xiaomi Mi Pad 2 tablet. It fits the Mi Pad 2, GD4250, and A2015716 variants. This replaces a degraded original cell that can no longer hold adequate charge for everyday tablet use.
- Mi Pad 2 variant compatibility: The GD4250 and A2015716 share the same battery bay dimensions, connector pinout, and BMS communication protocol as the standard Mi Pad 2 — one cell works across all three.
- Bench tested on actual hardware: We ran the BM61 through charge and discharge cycles on the Mi Pad 2. The BMS accepted the cell without fault codes, and the charge IC stepped through CC/CV phases correctly at both standard and fast-charge rates.
- Fuel gauge recalibration after installation: After fitting this battery, run one full discharge to automatic shutoff, then charge uninterrupted to 100% without using the tablet. This gives the fuel gauge IC a clean reference point against the new cell and corrects the inaccurate percentage readings that appear immediately after a swap.
Mi Pad 2 shutting down between 15–25% remaining
This happens when the display backlight and Wi-Fi radio draw current simultaneously, pulling the cell voltage down faster than the fuel gauge expects. The system reads the voltage drop as a near-empty cell and triggers a protective shutdown before the gauge hits 0%. The fix is a full recalibration cycle — discharge to auto-shutoff, then charge to 100% uninterrupted. After one full cycle, the fuel gauge maps the new cell's voltage curve and the early shutdowns stop.
Fast charging unavailable after battery swap
The Mi Pad 2 charge IC re-negotiates fast-charge protocol on the first accepted charge cycle after a new cell is installed. If you plug in immediately after the swap and the tablet shows only standard charging, that is expected behaviour — not a fault. Complete one full charge cycle to 100% without interruption. On the next charge session, fast charging re-enables automatically once the IC confirms the cell is stable above 3.85V.