What type of batteries does it use? 18650 Li-ion types are the most common, and these can be bought from countless vendors on ebay. Both of my LED lights use them. If it is the same type, make sure you buy the protected type, and get 3100maH as these are the longest lasting available. Panasonic is the most reliable manufacturer from Japan, the *fire types are Chinese and while they work, you never know what you'll get.