I'm about to purchase 1 or 2 good lights for camping / hiking. I have a MAHA charger for AA's.
I notice a lot of Fenix lights and forum users use 18650 & CR123A batteries.
What's the advantage of using an 18650 light, versus one that uses 2 or 3 AA's?
Should I invest in 18650's and another charger?
(A also hope to build a bike light - following nightrider on the diy bike led page - so would likely have a 14.8V 18650-based battery back - but I guess that one needs its own independent charger, too).