I love cordless flashlights. Just about every brand of cordless tool offers a flashlight that uses the standard battery. And it's the batteries that are the weak link. The lights (and tools in general) are tough as nails, but the batteries tend to go - and then you're left paying big $$$ for the now obsolete battery pack or buying a new, higher voltage model.
As such, tools like this wind up in pawn shops - and I can usually get them cheap...because they don't have the battery! lol And alot of them have a pivoting head design that is so helpful to me. What I've done is re-wire the things to run off of 9 volt transistor batteries. Any light that has a voltage that's an integer of 9 volts (9, 18, and 27 (i.e. 28)) is easily convertible to regular batteries. Wired in series, parallel - or a combo of both - results in a flashlight that bright, durable, and the batteries can be swapped out a whole lot faster than charger the old battery pack. Great to throw in the trunk - the pivot head aims the light right where you need it when changing a flat tire.
I've done two 9.6 volt Makita's, and an 18 volt Milwaukee. All three work great!