All my LED flashlights are purchased from eBay vendors. They all use a #18650 battery.
Search eBay for terms such as "18650" and "Ultrafire" and "CREE".
Each of my camera bags or cases have a small 18650 LED flashlight. On my hip, I wear a larger one that has a zoom lens encased in a ripstop Nylon belt holster. (Yes, I'm a geek!)
NOTE: be sure to buy the belt holster from the same vendor as the flashlight so the fit will be right. Very often you can find a package deal: flashlight + belt holster.
Be sure to buy an 18650 AC charger because they don't yet seem to be available locally.
Small 18650 LED flashlights often come with an adapter that allows one to use three AAA batteries instead of one 18650. The nice thing about that is you can find AAA batteries just about anywhere in the world, if needed.
I have used my 18650 LED flashlights as kickers when I was Director of Photography on the film "Family Business" when we were filming on city streets in the middle of the night. The flashlights fit perfectly into microphone shock mounts. They also fit into inexpensive bicycle clamps but instead of bikes, I attach them to my light stands.
BTW, "18650" has something to do with the dimensions. The inner workings are a result of laptop computer battery research.
The batteries I buy are marked:
UltraFire (R)
BRC 18650 4000mAh
3.7V Li-ion
Bookmarks