Involvement:Expert (understands the inner workings) - Ownership:more than 1 month
for those who use 18650 batteries you will get a longer run time with the light but the brightness is not the same with 2 cr123's. although still very bright with 18650 but with 2 fully charged 3/7v battery you almost get twice the brightness and you will use this R2 light to its full potential which is very bright this light seems HAIII i have this light since the summer time and i still havn't have any scratches on it.
the crown for this light doesn't fit the head very well and if you have it too tight it may damage the lens.
overall I think this is the best ultrafire light you can get because it offers different battery types with good brightness and run time. Also you get 2 different crowns
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