LG KS10 Replacement Battery 3.7V 800mAh LGLP-GBFM

LG KS10 — 3.7V Li-ion Replacement Battery (LGLP-GBFM)

This is a 3.7V, 800mAh Li-ion replacement battery for the LG KS10 mobile phone. It matches the original LGLP-GBFM specification. Fit it when the existing cell no longer holds enough charge to get through a normal day of calls and standby.

• KS10 platform fit: The KS10 uses a compact Li-ion cell on a 3.7V rail with a low-pin connector and no active BMS handshake — the charge IC on the phone handles all protection logic. This cell matches that connector pinout and physical footprint exactly.
• Bench tested on actual hardware: We cycled this cell through a full charge and discharge on the bench. The charge IC accepted the cell without fault flags, voltage held stable across the discharge curve, and the BMS cutoff triggered cleanly at the low-voltage threshold.
• Fuel gauge recalibration after cell swap: On first use after fitting, run one full discharge down to auto-shutdown, then charge to 100% without interruption. This lets the KS10's fuel gauge IC map the new cell's discharge curve before reporting accurate percentages.

Why the KS10 reports wrong battery percentage after a cell swap

The KS10 uses a fuel gauge IC that builds a model of the cell's discharge curve over time. When you fit a new cell, that stored model still reflects the old, degraded cell. The mismatch causes the phone to report percentages that jump or drop suddenly — the IC is reading voltage points against the wrong reference curve. One complete uninterrupted discharge-charge cycle overwrites the calibration data and aligns the gauge to the new cell.

Sudden shutdown at 15–25% on the replacement cell

This happens when the fuel gauge IC hasn't yet recalibrated to the new cell's voltage cliff — the point where cell voltage drops sharply under load from the screen or modem. The phone's software cuts power based on a voltage threshold it still associates with the old cell, triggering shutdown before the cell is actually empty. Run two full discharge-charge cycles and the shutdowns will stop. If the phone cuts out at or below 3.0V under load after two cycles, the cell itself may have a high internal impedance — check voltage under screen-on load before ruling out a fault.