Originally Posted by
mechBgon
The advantage is that the 18650 setup can deliver more light, and do so for much longer. ~250 lumens for >5 hours on 18650, versus ~150 lumens for ~1.5 hours on NiMH AA.
As far as riding in the rain with that light with 18650 batteries is that safe? Since I don't know anything about the batteries are the ones you recommended the best and safest? I really like the 5 hour run time.