BL179 Lenovo A288t Replacement Battery 3.7V 1650mAh

Lenovo A288t / A690 Series — 3.7V Li-ion Replacement Battery (BL179)

This is a 3.7V, 1650mAh Li-ion replacement cell for the Lenovo A288t, A690, A698T, A298, and 14 additional Lenovo Android smartphones that share the BL179 battery platform. It is a direct swap for the original cell when the existing battery no longer holds a charge or causes unexpected shutdowns. OEM part numbers covered include BL179, BL186, BL200, BL194, and BL180.

• Multi-model compatibility across the A-series platform: These Lenovo A-series phones share the same 3.7V single-cell architecture, connector pinout, and BMS handshake protocol — which is why one cell fits across the full range without firmware or hardware modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on an A690 unit. The BMS accepted charge current without triggering protection cutoff, and the cell reached rated capacity within two full cycles.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before the OS starts making percentage calculations against it — skipping this step is the most common cause of erratic percentage readings after a swap.

Sudden shutdown at 20–30% on the replacement cell

This happens because the fuel gauge IC is still running the discharge curve from the old, degraded cell. The new cell has a steeper voltage cliff under modem and screen load than the old cell did — so the phone hits the hardware undervoltage threshold while the OS still reports 20–30% remaining. The fix is one full discharge-charge cycle with no fast charging, which forces the coulomb counter to re-anchor its low-voltage endpoint to the new cell. After that cycle, percentage reporting and shutdown behaviour should align correctly.

Phone warm near the battery during the first few charges

A new Li-ion cell has higher internal impedance than a cell that has been cycled. During the first charge, the charge IC works against that higher resistance, which generates more heat than normal at the battery and charging circuit. This is expected and typically resolves after two to three full cycles as the cell's impedance drops. If the phone stays warm beyond the third cycle or becomes hot to the touch, check that the back cover is fully seated — a partially lifted cover traps heat against the cell.