2AA LED

Good service. Flashlight is very powerful for a small unit. It took me a few goes to get the right technique to switch power levels / modes.

I just find this is the best design for a flashlight. It's slim and simple and easy to store without getting caught on things. It's also very easy to change settings and the switch is not one of those crumby push buttons that inevitably breaks or becomes harder to press pver time.

Disappointing