About this replacement
LG VX6000 Series — 3.7V Li-ion Replacement Battery (LGLI-ADGM)
This is a 3.7V, 1000mAh Li-ion replacement battery for the LG VX6000 flip phone. It fits the VX6000, VX-6000, and VX6007 handsets. Swap it in when the original cell no longer holds a charge or fails to power the phone through normal use.
- VX6000 and VX6007 compatibility: The VX6000 and VX6007 share the same battery bay geometry, connector pinout, and 3.7V single-cell Li-ion voltage rail. The BMS in both handsets communicates over the same thermistor line, so this cell's protection circuit handshakes correctly with either model without modification.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the VX6000 platform. The BMS tripped correctly at the low-voltage cutoff, and the charge IC accepted the cell without fault flags or charge termination errors.
- Fuel gauge recalibration on first install: After fitting this cell, run one complete discharge down to automatic shutoff, then charge uninterrupted to 100%. The VX6000's fuel gauge IC maps its coulomb counter to the original cell's discharge curve — one full cycle resets that baseline against the new cell so percentage readings stay accurate.
Why the VX6000 reports wrong battery percentage after a cell swap
The VX6000 uses a fuel gauge IC that tracks charge state by counting coulombs relative to a stored discharge curve from the previous cell. When you install a new cell, that stored curve no longer matches the actual cell chemistry and impedance. The gauge reads the voltage and estimates state-of-charge against old data, producing percentage figures that are off — sometimes by 20% or more. One full discharge-to-shutoff followed by an uninterrupted charge to 4.2V forces the IC to re-anchor its model to the new cell.
Sudden shutdown at 20–30% on the replacement cell
This happens when the cell voltage drops sharply under load before the fuel gauge reaches zero — a voltage cliff caused by the cell entering a high-impedance state faster than the gauge predicted. On the VX6000, the CDMA radio transmitter draws a short burst of current during call setup; if the cell cannot sustain voltage under that load, the phone shuts off even though the displayed percentage still shows charge remaining. The fix is the same recalibration cycle: fully discharge to automatic shutoff, then charge to 4.2V without interruption. After one complete cycle, the fuel gauge IC recalibrates its cutoff threshold against the actual discharge curve of the new cell.