Zen Box - How long does the battery last?

The Zen Box's battery life after a full charge of 2.5 hours depends on use:

Approximately 6 hours using the on-board sounds at a low volume.

Approximately 4.5 hours with other than white light.

Approximately 2.5 hours with a light other than white and an on-board sound played at a low volume.

Approximately 1.5 hours with white light.