AudioVox CDM-8932 Replacement Battery BTR-8932 3.7V 900mAh

AudioVox CDM-8932 — 3.7V Li-ion Replacement Battery (BTR-8932)

This is a 3.7V, 900mAh Li-ion battery for the AudioVox CDM-8932 mobile phone. It replaces OEM part BTR-8932 and fits the CDM-8932 directly. Use it when the original cell no longer holds a charge or shuts down early under load.

• CDM-8932 cell fit: The CDM-8932 uses a single Li-ion cell at 3.7V nominal. The BMS on this phone monitors cell voltage and temperature — any replacement cell must match that voltage rail exactly or the charge IC will reject it at handshake. BTR-8932 meets that spec.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the CDM-8932 platform. The BMS accepted the cell on first insertion, charge IC engaged normally, and voltage held stable across the discharge curve without premature cutoff.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging if available and run one complete discharge-charge cycle before normal use. The CDM-8932's fuel gauge IC is calibrated to the old cell's discharge curve — one full cycle lets it remap against the new cell before reporting accurate percentages.

Sudden shutdown at 20–30% on the CDM-8932 after a cell swap

This is a voltage cliff issue, not a capacity fault. The CDM-8932's modem and display draw enough current at peak that a new, uncalibrated cell can sag below the BMS cutoff threshold — even when the fuel gauge still reads 20–30%. The phone shuts down to protect the cell, but the gauge hasn't yet learned where the real cutoff sits on this cell's curve. Run one full discharge to automatic shutdown, then charge uninterrupted to 100%. After that cycle, the fuel gauge IC has a mapped curve and shutdowns at low percentage become far less frequent.

Phone shows incorrect battery percentage after installing the BTR-8932

The CDM-8932 uses a fuel gauge IC that stores a coulomb-count model of the previous cell. A new cell with a fresh discharge curve reads as mismatched data — the gauge reports numbers based on the old cell, not the one installed. The fix is a full calibration cycle: drain the phone to auto-shutdown under normal use, then charge to 100% without interruption. After one complete cycle, the IC resets its model to the new cell and percentage reporting stabilises.