Sorry for posting to such an old thread, but it seemed like the best place for my question. I recently purchased an H7 from ultrafire-shop.net. While I was at it, I ordered a couple of rechargeable 14500 batteries to go with it. Now that I have them, I'm afraid to put these batteries in the light. As noted above, there doesn't seem to be any input voltage specified for this light. It works just fine with a 1.5V AA or lower voltage NiMHs, but can it handle these 3.6V batteries? This is probably a silly question, but without info from the manufacturer, how would I even guess? I mean there's always trial and error, but that can create some expensive paper weights. I did try contacting the seller, but mail bounces from all their contact addresses. Apparently the only way to contact them is to order something...