A battery recommendation

After some poking around the interwebs and one endorsement from Arcticdude this is a brand I would recommend too Keeppower li-ion battery. Here's a graph of performance. Test/Review of Keeppower 26650 5200mAh (Black) 2014

Can be bought from illumn.com and Adventure Sports Flashlights.

Currently I'm using a 26650 protected battery in my class4 laser.