The contact on the light of the GENTOS GH100RG is a little poor, and it sometimes doesn't turn on. Tapping it will fix it. Someone who likes lights can fix it easily. This one has hardly been used. The other lights have been used, but they still work. The Black Diamond should have its band replaced. Each one is a high-end model, but they have been used and have scratches. The GH001 does not come with the dedicated battery. It can also use AAA batteries. It's a shame, but I'm getting rid of them to declutter. I'm selling them as a set at a low price. I think it's a good deal. Please purchase with no returns, no refunds, and no exchanges (3N).