i bought this one about 3 months ago but until now i still don't know if it's any good. wish I would have read the description back then. it takes a weird size battery i don't even know where to find 1 x 18650 battery. i just haven't had the motivation to go look for it. i would have thought it would have just been aa, c, or d.
Sorry to tell you, but the battery and charger is going to cost more then the flashlight itself. If you going to buy a quality 18650 battery with a panasonic cell, it gonna cost around $15 for one battery.