Archos Pocket Video Recorder AV400 Compatible Battery 774001 3.7V

Archos Pocket Video Recorder AV400 / V480 Series — 3.7V Li-Polymer Replacement Battery (774001)

This 3.7V 3150mAh Li-Polymer battery replaces OEM part 774001 in the Archos Pocket Video Recorder AV400 80GB, V480 80GB, and AV4100. It fits the original battery bay and connects to the same BMS circuitry the device uses to track charge state. Capacity figures come directly from product data — 3150mAh / 11.66Wh.

• AV400 / V480 / AV4100 platform fit: These models share the same 3.7V single-cell Li-Polymer architecture, connector pinout, and BMS handshake protocol — which is why one battery covers the full range without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the AV400 platform and confirmed the BMS accepted the pack without fault flags, voltage read-back matched the cell's actual state of charge, and the protection circuit tripped correctly at the low-voltage cutoff threshold.
• First charge after installation: Media players in the AV400 family use a voltage-threshold wake circuit. If the replacement cell sits at a resting voltage below that threshold, the device will appear dead. Connect the charger immediately after installation and leave it for at least 30 minutes before attempting to power on — this allows the trickle stage to bring the cell above the wake threshold.

Battery percentage jumping after cell swap on the AV400

The AV400 uses a voltage-threshold fuel gauge — it maps battery percentage to specific cell voltages rather than tracking coulombs in and out. After a cell swap, the gauge's stored voltage table no longer matches the new cell's discharge curve until a full calibration cycle runs. You will see the percentage counter skip or freeze, then jump at unpredictable points. Run one complete charge to 100%, then discharge fully to automatic shutoff, then charge again — after that cycle the percentage readout stabilises.

Playback cutting out before the battery indicator shows empty

The AV400's audio and video output amplifiers draw a surge of current during active playback. Toward the end of a Li-Polymer cell's discharge, internal resistance rises and voltage sags under that load — even if the indicator still shows partial charge. The BMS interprets this voltage sag as an undervoltage event and cuts the output to protect the cell. If playback stops while the indicator still shows 10–20%, the cell has reached the point where its loaded voltage drops below 3.0V under amplifier draw. A full charge cycle restores normal headroom.