Originally Posted by
the cyclops
As long as the light is the proper size for the mount, it's perfect. (And most of the 18650 lights are.)
It's very simple -- nothing to go wrong. Just buy it and try it.
In
all regards? I'm not going to go into it quite that much ...
If you have the choice, go for the 18650. Rechargable AAA's are generally 700-1000 mAh, and the 18650's have the voltage of three AAA's and about 2000-2500 mAh -- so double to triple the runtime, and easier to install and remove to recharge.
NiCd have been largely replaced by NiMH. NiMH cells are good in that they're rechargeable, but it's really hard to beat the 18650 li-ion batteries -- they're cheap, low self discharge rate, have high capacity, only one battery to swap rather than three, etc.
I mean I can get a 4pack of decent rayovac alk's for $1 a pop from the dollar store,or an 8 pack of decent sunbeam batteries also for $1,so is it worth it to by the lith's or nicad's?
Decent headlights use batteries up in a few hours or less, depending on just how decent they are.
EDIT!!!!!!! I JUST SEEN THE RUNTIME RATED AT 40MINUTES FOR THE ROMISEN?
At full power, that makes sense. So about $1.50/hr to use it?
A 18650 would probably give you double that. Also note that the 18650's are $8 for 2 -- so $4 each. So they cost almost 3x as much as the non rechargeable AAA's -- but you can use them a few hundred times. Well worth it.