Archos 9 Media Player Compatible Battery 7.4V 6000mAh

Archos 9 Tablet PC — 7.4V Li-Polymer Replacement Battery (400238)

This 7.4V, 6000mAh Li-Polymer battery replaces OEM part numbers 400238 and 501500 in the Archos 9 and Archos 9 Tablet PC portable media players. It restores the device's ability to run untethered for video playback, photo browsing, and general media use. Capacity figure is taken directly from product specifications at 44.4Wh.

• Archos 9 and 9 Tablet PC fit: Both model designations use the same 7.4V two-cell Li-Polymer pack with identical connector pinout and BMS handshake voltage thresholds — one battery covers both variants without modification.
• Bench tested on actual hardware: We ran full charge and discharge cycles on the Archos 9 platform. The BMS correctly flagged over-voltage protection at the top of charge and cut discharge at the low-voltage threshold before cell damage could occur.
• First-install charge procedure for the Archos 9: Media players in storage frequently enter deep-discharge protection. On first install, connect the charger and leave it for at least 30 minutes before attempting to power on — the device needs a slow trickle to exit protection mode before it will accept normal charge current.

Battery percentage jumping after cell swap on the Archos 9

After fitting a replacement cell, the Archos 9's fuel gauge reads against a voltage-threshold map calibrated to the old, degraded pack. The new cells have a different discharge curve, so the displayed percentage can jump 10–20% between readings. Run two or three full charge-to-discharge cycles and the indicator recalibrates against the new cell's actual voltage curve. After recalibration, the gauge stabilises around 3.6–3.7V per cell at the midpoint of charge.

Playback cuts out before the battery indicator shows empty

The Archos 9's audio amplifier draws a spike of current at higher volume levels, which pulls the cell voltage down sharply at the tail end of discharge. The BMS interprets this voltage sag as a low-cell condition and trips the cutoff before the indicator reaches zero. Lowering playback volume by 20–30% during the last visible battery bar gives the cells enough headroom to avoid premature cutoff. If the problem persists after a fresh install, confirm cell resting voltage is above 7.0V before playback begins.