you have to take out the batteries to charge them. if using 20 batteries and charge them directly and one of the batteries is defective, that's a little bit like charging a bomb... I think it's a safety design, though bring some complicated steps.
why don't you use Google? you'll find lots of stores. one for your reference: www.fenixtactical.com
if don't like google, send email to [email protected]!
Overall, surefire is the big boss of the flashlight producer. Fenix is the big boss of the Chinese LED flashlight producer and Fenix flashlight is expensive than any other Chinese flashlight but cheaper than surefire. As you use the flashlight on hiking, TK21 would be a good choice. It's...