About this replacement
LG KG288 / LX160 / CG180 — 3.7V Li-ion Replacement Battery (LGIP-411A)
This is a 3.7V, 600mAh Li-ion battery that replaces the original LGIP-411A cell in the LG KG288, LX160, CG180, and CG810 handsets. It slots into the same battery bay, connects to the same three-pin contact strip, and lets the phone's charge IC resume normal operation. Capacity is 600mAh — identical to the factory specification.
- KG288 / LX160 / CG180 / CG810 platform fit: These models share the same LGIP-411A footprint, contact layout, and 3.7V single-cell architecture. The BMS on each handset expects the same voltage window and thermistor response, so one cell works across all four.
- Bench tested on actual hardware: We ran the cell through a full charge cycle on a KG288 body. The charge IC accepted the cell without error, the BMS reported a clean voltage curve from 3.0V to 4.2V, and the protection circuit tripped correctly at the low-voltage cutoff threshold.
- Fuel gauge recalibration on first cycle: After fitting this cell, run the phone down until it shuts off on its own, then charge it uninterrupted to 100% before using it again. The KG288's fuel gauge IC maps capacity against a discharge curve stored from the old cell — one full cycle overwrites that curve and stops the percentage jumping.
Why the KG288 reports wrong battery percentage after a cell swap
The KG288 uses a coulomb-counter fuel gauge that tracks charge by integrating current in and out of the cell over time. When the original cell degrades, that counter drifts — and when a new cell goes in, the stored discharge curve no longer matches the new cell's chemistry. The gauge reads the new cell as if it were the old one, so the percentage display is wrong until recalibration. One complete discharge-to-shutdown followed by a full uninterrupted charge corrects the stored curve and brings the display back into sync.
Sudden shutdown at 20–30% on the replacement cell
This happens when the fuel gauge IC hasn't recalibrated yet and the phone underestimates how close the cell actually is to its low-voltage cutoff. Under load — a call, backlight, or keypad activity — the cell voltage sags below the protection threshold faster than the displayed percentage suggests, and the BMS cuts power immediately. It's not a faulty cell; it's a gauge that hasn't seen a full cycle yet. Run one complete discharge-charge cycle and the shutdowns stop — the gauge will then know the real voltage cliff sits closer to 3.0V per cell.