About this replacement
LG 510 (CDMA) Series — 3.7V Li-ion Replacement Battery (LGLI-AAEL)
This is a 3.7V, 1150mAh Li-ion replacement battery for the LG 510 (CDMA), Touch Point, TP1100, and related models. It replaces OEM part number LGLI-AAEL. Fit the cell when the original no longer holds a charge or causes random shutdowns.
- 510 (CDMA) and Touch Point compatibility: These models share the same battery footprint, connector pinout, and voltage rail. The BMS handshake spec is identical across the 510 CDMA and TP1100 variants, so one cell covers the whole group without any wiring changes.
- Bench tested on actual hardware: We cycled this cell through charge, standby, and active call load on a 510-series unit. The BMS held cutoff correctly at both low-voltage and overvoltage thresholds, and the fuel gauge IC tracked state-of-charge without resetting mid-cycle.
- Fuel gauge recalibration on first use: On first installation, disable any fast-charge option and run one complete discharge-charge cycle before normal use. This lets the fuel gauge IC build an accurate discharge curve against the new cell before high-current charging pushes current into an uncalibrated coulomb counter.
Why the LG 510 reports wrong battery percentage after a cell swap
The fuel gauge IC on the 510 stores a discharge curve calibrated to the original cell's impedance profile. A new cell has a different internal resistance, so the IC maps voltage readings against the wrong curve. This causes the percentage display to read high or low by 10–20 points until recalibration. One full discharge to automatic cutoff followed by an uninterrupted charge to 100% resets the stored curve to match the replacement cell.
Sudden shutdown at 20–30% on the replacement cell
This happens when the cell voltage drops below the modem or display load threshold faster than the fuel gauge expects — a classic voltage cliff on a new cell that hasn't been calibrated yet. The BMS trips the cutoff before the displayed percentage reaches zero because the voltage sags sharply under GSM transmit bursts or screen-on load. It is not a faulty cell. Run one full discharge cycle without interruption, let the phone reach automatic shutdown, then charge fully to 4.2V. The cliff behaviour resolves once the fuel gauge IC has a complete curve to reference.