I picked up this light the other day, and I've found it very useful. It is a two piece light, that unscrews between the head and body. The threads are anodized so loosening the head a little locks it out.The magnetic charging dock on the light works very well and the battery measured 4.19v when fully charged. The main beam has a tight spot with good throw, its similar to my Crelant 7G6CS. I'd say its 25000cd like it says in the specs. The side light is a good flood, like the H502. It works well for walking it lights up everything in your immediate area if you need to see farther the main beam is already pointed in the right direction. It would also make a good car or work light. The only thing I'd change is add the 1lm mode to the side light and add a 120lm mode to the main beam. The UI does take a little getting used to, but over all I think it's a good light.