About this replacement
Lenovo A880 / A916 Series — 3.7V Li-ion Replacement Battery (BL219)
The BL219 is a 3.7V, 1900mAh Li-ion cell that fits the Lenovo A880, A889, A388t, and A916. It replaces an original battery that no longer holds charge or shuts down unexpectedly under load. Capacity is rated at 7.03Wh, matching the original cell specification.
- A880 / A916 platform compatibility: These models share the same battery bay dimensions, connector pinout, and BMS communication protocol — the same cell services the fuel gauge IC and charge controller across the entire series without modification.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge on an A880 unit. The BMS accepted the cell on first insertion, charge termination triggered correctly at 4.2V, and the fuel gauge IC began tracking capacity without manual intervention.
- Fuel gauge recalibration after install: On first use, disable fast charging and run one complete discharge-to-charge cycle at standard current. This gives the fuel gauge IC a clean discharge curve to calibrate against the new cell before high-current charging is introduced.
Why the A880 reports wrong battery percentage after a cell swap
The A880 uses a coulomb-counting fuel gauge IC that builds its capacity model from historical charge and discharge data stored against the old cell. When a new cell goes in, that stored curve no longer matches actual cell chemistry, so the percentage reading drifts. The IC needs at least one full discharge from 100% to auto-shutoff, followed by a full charge, before it recalculates a new baseline. Until that cycle completes, readings above 80% and below 25% are the least accurate. Let the phone reach auto-shutoff naturally on that first cycle — do not top up mid-discharge.
Sudden shutdown at 20–30% on the replacement cell
This happens when the cell voltage drops below what the modem or display backlight needs under peak load, even though the fuel gauge still shows charge remaining. A fresh Li-ion cell with an uncalibrated gauge cannot accurately map remaining voltage to percentage, so the phone cuts out before the displayed number reaches zero. The fix is the same full recalibration cycle — one uninterrupted discharge to auto-shutoff, then charge to 100%. After that cycle, the gauge maps the new cell's voltage curve correctly and the early shutoffs stop.