Creative DiVi CAM 428 Replacement Battery 3.7V 1050mAh

Creative DiVi CAM 428 Portable MP3 Player — 3.7V Li-ion Replacement Battery

This is a 3.7V 1050mAh Li-ion replacement battery for the Creative DiVi CAM 428 portable MP3 player. It matches the original cell dimensions at 52.98 × 35.59 × 7.16mm and slots directly into the existing battery bay. Voltage and capacity figures come from the product data — not estimated from web sources.

• DiVi CAM 428 fit: The DiVi CAM 428 uses a single-cell 3.7V Li-ion pack with a compact footprint. This replacement matches that form factor and the voltage rail the device's audio and media controller circuitry expects.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench. The BMS engaged cleanly at both ends — no false low-voltage cutoff and no overcharge pass-through at the top of the charge curve.
• First charge after a cell swap: Media players frequently enter deep-discharge protection after a new cell is fitted. Connect the charger and leave the device plugged in for at least 30 minutes before attempting to power it on — this allows the BMS to trickle-charge out of the protection state.

Battery percentage jumping after cell swap on the DiVi CAM 428

After fitting a new cell, the DiVi CAM 428's fuel gauge may report erratic percentages — jumping from 80% to 20% mid-session or skipping large chunks at a time. This happens because the device's voltage-threshold indicator was calibrated to the old, degraded cell's discharge curve. The new cell has a flatter discharge curve, so the voltage readings don't map cleanly to the stored thresholds. Run two or three full charge-to-cutoff cycles and the indicator recalibrates to the new cell's behaviour.

Playback cutting out before the battery indicator shows empty

The audio amplifier in the DiVi CAM 428 draws a higher instantaneous current than the idle display or menu navigation. Near the end of a discharge cycle, a tired or undersized cell cannot maintain the voltage rail under that load spike. The BMS reads the resulting voltage sag as a low-cell condition and cuts power — even though the reported charge still shows a few percent remaining. This replacement cell is rated to the original 1050mAh capacity, which restores the voltage headroom the amp needs in that final discharge window.