The specs for the V11R says "Powered by one 16340 or one 14500 (only when with optional AA extender), this light generates up to 570 lumens (Do notBob Damon Today, 01:02 PM
There is the Mk II version available for pre-order.cagenuts Today, 01:00 PM
Thrunite TN 12 + Xtar sp1 + Keeppower 3400 has worked for me. I ordered them from three different places. Even got discount off the charger It canD6859 Today, 12:59 PM
You don't need their charger or batteries but if it comes in a kit then it may be worthwhile.
I use the Nitecore i4 and Keeppower protected