which battery?

[Interslice]

Hi from Ireland,
:wave:.

I bought this torch for scuba diving. As a student it's the best I could afford. http://www.ebay.ie/itm/190738530800?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

It uses a CREE XM-L T6. The seller recommends a 18650 battery.

From what I can gather off the CREE website this LED will last longest at 2000mA. It seems this is achieved at 3.0 - 3.2V or a 123. As the 18650's run at 3.7 to 4.2 will the current will be higher and shorten the life of the LED?

I ordered the torch thinking it took AA's and got a bit off a shock. Never used any of these batteries before.
What's the best battery and charger to get for this torch. I can't decide from all info.

Thanks

 

[Shadowww]

A CR123A has voltage of ~2.5V under load, not 3.0-3.2V.
Also, battery isn't connected directly to LED. There's a driver (electronic circuit) inbetween, which regulates current output to LED.

Best battery/charger combo would be Xtar WP2 II charger (or Xtar SP2 if you want the best at cost of almost 2x the price), and pair of 3100mAh or 3400mAh batteries by Keeppower (if you want button-top batteries) or Intl-Outdoor Store (if you want raised-top).