I’ve got two Trustfire TR-J20’s that take three of these cells. One has been up graded to 12 XP-L2’s. Review: TrustFire TR-J20 - 12 x XM-L (3 x 32650) Chunky Monkey! TrustFire TR - J20 $64.99 Just want to use some newer cells to get the most out of the light. Great for a dog walking light in zombie infested areas.