So first of all I must say that I am satisfied on the whole with my tiara A1. It is very well made, small, lightweight and provides for my needs good light. I need you especially for repairs under the car and stuff. In the brightness I had expected more. My retrofitted with LED Mini Maglite (2 x AA) is considerably brighter. (Yes, I know that you can set different levels of brightness). And the battery life is really short, but that's probably the price for its light weight with only one AA battery. At 50 minutes, I've never come. Ni-MH batteries last less than 10 minutes. Lion battery I have not tried yet. Have now but always spare batteries in your pocket, so we both get along just fine.