Rave MP300 Replacement Battery 1.2V 1200mAh Ni-MH

Rave MP300 — 1.2V Ni-MH 1200mAh Replacement Battery

This is a 1.2V Ni-MH battery rated at 1200mAh (1.44Wh) for the Rave MP300 portable media player. It replaces the original rechargeable cell when the existing battery no longer holds charge or fails to power the device. Dimensions are 66.78 × 16.70 × 5.96mm — confirm these against your existing cell before ordering.

• MP300 compatibility: The MP300 runs on a single Ni-MH cell at 1.2V nominal. The voltage rail and physical footprint must match exactly — swapping to a different chemistry or cell size will prevent the battery door from closing or cause the device to misread charge state.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the MP300 platform. The device accepted a full charge without error, and the battery protection circuit held within the expected Ni-MH discharge curve through audio playback.
• First charge after installation: Connect the MP300 to its charger immediately after fitting this battery and allow a full, uninterrupted charge before first use. Media players using Ni-MH cells can enter a low-voltage protection state after storage — a complete initial charge resets the threshold and prevents the device from cutting power prematurely.

Playback cutting out before the battery indicator shows empty

The MP300 uses a voltage-threshold indicator rather than a fuel gauge. As a Ni-MH cell ages, its voltage sags earlier under the load of the audio amplifier — even while the indicator still shows charge remaining. The device reads the sag as a cutoff condition and shuts down. A fresh cell restores the flat discharge curve that Ni-MH is known for, and playback should run through to the low-battery warning without unexpected shutdowns.

Battery percentage jumping erratically after fitting a new cell

After a cell swap, the MP300's voltage-based indicator needs several charge and discharge cycles to recalibrate to the new cell's behaviour. On the first cycle, the percentage reading may jump or drop suddenly — this is not a fault with the battery. Run two to three full charge-to-discharge cycles without interruption. By the third cycle, the indicator should track consistently against actual remaining capacity.