Q-Sonic PE2064-2 Multimedia X-Dream-Player Compatible Battery 7.4V 1700mAh

Q-Sonic Multimedia X-Dream-Player / PE-2058 — 7.4V Li-ion Replacement Battery (PE2064-2)

This 7.4V, 1700mAh Li-ion battery replaces the original cell pack in the Q-Sonic Multimedia X-Dream-Player and PE-2058 portable media player. It matches the OEM part numbers PE2064-2 and CGP345010G. Capacity is 12.58Wh — identical to the factory specification.

• X-Dream-Player and PE-2058 compatibility: Both models share the same 7.4V two-cell Li-ion architecture, connector pinout, and BMS communication protocol — one battery fits either unit without modification.
• Bench tested on actual hardware: We cycled this battery through the X-Dream-Player's charge controller and confirmed the BMS handshake completes correctly, with charge termination triggering at the expected 8.4V cutoff.
• Post-swap charge cycle: After fitting a new cell, charge the player fully before first use. Media players frequently enter deep-discharge protection after cell replacement, and the charge controller needs to push a slow trickle current before it transitions to normal CC/CV charging.

Battery percentage jumping around after a cell swap

The X-Dream-Player uses a voltage-threshold fuel gauge rather than a coulomb counter. When a new cell goes in, the gauge has no learned baseline to map voltage against remaining charge. It estimates state-of-charge from raw cell voltage, which causes the display to jump 10–20% in either direction until the BMS runs two or three full charge-discharge cycles and recalibrates its voltage curve. Run the player down to the low-battery warning and then charge to full — repeat twice and the percentage readout will stabilise.

Playback cutting out before the battery indicator reads empty

The audio amplifier stage in the X-Dream-Player draws a spike of current when driving headphones at higher volumes. Near the end of a discharge cycle, cell voltage sags under that load and briefly dips below the BMS undervoltage threshold, triggering a protective cutoff even though the gauge still shows charge remaining. This is not a faulty battery — it is the BMS protecting the cells from damage. Lower playback volume during the final portion of charge or charge the unit when the indicator reaches one bar to avoid the cutoff.