About this replacement
AudioVox CDM-8945 / PN-230 — 3.7V Li-ion Replacement Battery (BTE--8945)
This is a 3.7V, 1500mAh Li-ion replacement battery for the AudioVox CDM-8945, PN-230, Telit V230, PM230, and PM-230 mobile phones. It matches the OEM part number BTE--8945 and slots directly into the original battery bay. Capacity figures come from the product data sheet — 1500mAh / 5.55Wh.
- CDM-8945 / PN-230 / Telit V230 platform: These models share the same battery bay dimensions, connector pinout, and 3.7V nominal voltage rail. The BMS on each device communicates the same charge termination signal, so one cell works across the entire platform without modification.
- Bench tested on actual hardware: We cycled this battery on a CDM-8945 unit through charge and discharge under normal phone load. The BMS accepted charge termination correctly and held voltage within expected range through the full cycle. No mid-cycle cutoff was observed.
- Fuel gauge recalibration on first install: On first use after installation, disable fast charging if available and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before the charge controller starts pushing higher current into an uncalibrated cell.
Why the CDM-8945 reports wrong battery percentage after a cell swap
The CDM-8945 uses a fuel gauge IC that tracks battery state by counting charge in and out of the cell — a process called coulomb counting. When you replace the cell, the IC still holds calibration data from the old, degraded cell. The new cell has a different internal resistance and a different discharge curve, so the IC reads percentage against the wrong reference. One full discharge down to automatic shutdown followed by a full charge to 4.2V resets the reference and corrects the percentage display.
Sudden shutdown at 20–30% remaining on the replacement cell
This shutdown is not a fault in the battery — it is a voltage cliff. When the modem transmits or the screen peaks in brightness, current draw spikes sharply. If the fuel gauge IC has not yet recalibrated to the new cell, it underestimates how close the cell voltage is to the BMS cutoff threshold of approximately 3.0V. The cell hits cutoff under load while the display still shows a high percentage. Run one full discharge-charge cycle to let the coulomb counter align with the new cell's actual capacity floor.