I was in The Source (kind of like radio shack) looking for a spring for my EVO, the guy asks what i am using it for, i tell him, he then asks if i need any batteries for my evo, I tell him it takes rechargeable 16340's, so he proceeds to scour the battery rack (not that i was going to buy any of them lol). He found something the same size, an alkaline battery (i believe) and tries to tell me that it should work just fine, but it is not rechargeable......uhhh no thanks. Someone whom does not know any better might wind up buying them though