Reviewed by Big Bob W from Michigan on Sunday, July 21, 2013
The batteries are A123s, which are about $10 a pair. And, the battery life on this headlamp is shockingly short. When you first put the batteries in, you do get a great light. Very bright. But within a 4-5 hours *on low setting*, it gives you the blinking light meaning you are getting low. After this, the light just fades. I would typically get 6-8 hours between putting in a new battery and the light going out completely. Really frustrating. And these specialty batteries are a little more difficult to find especially if you are using your light abroad. I am blown away that this headlight has received so many positive reviews!