Originally Posted by
lopek77
I have 5 of these lights...I'm sure you will be happy with it, but from my experience I know that the best result you will get only with two of these together - one for throw and second as a flood ( they have adjustable zoom ) I'm using them with 3 AAA batteries, so I can replace them easily. On AAA batteries this light works for a very long time, probably for several hours on high before they go gradually dim.
The Ebay listing given doesn't say that the lights work with AAAs, though I have seen 18650 lights that come with an adapter that make them work with 3xAAA lights (and a sleeve to make an 18650 work.)
If your light accepts 1x18650 or 3xAAAs ... I
strongly suggest the 18650. One rechargeable 18650 contains about 2.5 to 3x the energy of three rechargeable AAAs, so it can last 2.5x as long, or put put 2.5x as much light (if the light supports that), or something in between. Also, the LiIon batteries have lower self discharge rates (unless you use eneloops or similar batteries) so they last longer even when not used. And when it comes to charging and swapping out batteries -- one 18650 is more convenient than 3xAAAs. It's easier to keep a spare 18650 in your bag (especially with it's low self-discharge rate) than 3xAAAs.