Philips GoGear HDD082/17 Compatible Battery 3.7V 550mAh

Philips GoGear HDD082/17 2GB — 3.7V Li-Polymer Replacement Battery (742345)

This 3.7V, 550mAh lithium-polymer battery replaces part number 742345 in the Philips GoGear HDD082/17 2GB portable media player. It matches the original cell's dimensions at 44.83 × 22.42 × 6.78mm, fitting the compact chassis without modification. Capacity is 550mAh (2.04Wh), matching the stock specification.

• GoGear HDD082/17 2GB fit: The HDD082/17 uses a slim Li-Polymer cell with a specific connector pinout tied to the player's charge management IC. This battery matches that pinout, voltage rail, and physical footprint exactly — the BMS handshake completes without error codes.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the GoGear platform. The protection circuit triggered correctly at low-voltage cutoff, and the charge IC accepted a full charge cycle without fault flags.
• Post-swap initialisation on the GoGear HDD082/17: After fitting this cell, connect the player to its charger for a full uninterrupted charge before first use. A new or long-stored Li-Polymer cell can sit below the threshold the device's charge IC recognises as a valid battery — the trickle stage brings it into the accepted voltage window before normal charging begins.

Battery percentage jumping after cell swap on the HDD082/17

The GoGear HDD082/17 uses a voltage-threshold method to estimate battery level — it does not have a dedicated fuel gauge IC. After a cell swap, the player's reference points are tied to the old cell's discharge curve, so the percentage display can jump or read incorrectly for the first few cycles. Running the battery from a full charge down to automatic shutdown, then charging fully again, resets those reference points. After two or three full cycles the readout stabilises against the new cell's actual curve.

Playback cutting out before the battery indicator shows empty

The audio amplifier in the HDD082/17 draws a spike of current during playback that the cell cannot sustain cleanly once it drops below roughly 3.4V. The BMS reads this voltage sag as a fault condition and cuts power to protect the cell — even though the indicator still shows charge remaining. This is not a faulty battery; it is the protection circuit doing its job on an aged or partially discharged cell. If cutouts happen consistently at the same point in a playlist, a full charge cycle will shift that threshold back toward the end of the discharge curve where it belongs.