The battery last for about 300 charges. After that, it stops holding a full charge. In most cases, simply replacing the battery resolves the problem.
For longest life:
- Allow the battery to discharge until the red low battery light (read “BAT”) starts to flash.
- Charge it for 1.5 hours until the battery light turns green.
- Also, leaving it on the charger tends to shorten battery life.
Charging after each use tends to use up the 300 charges faster.