WTS ($1.50ea) INTL shipping OK (22) SONY SF US18650GR Used Good Laptop 18650 cells over 3x the capacity of chinese fire cells.
If you want I can top them off before I ship, that way you dont need a charger just buy a few and be done with it. Plus down the road you can alwaysthem as EDC batteries.
For a high amp application the resistance is too high to get the most out of the light, but for an application where you want to buy battery life cycles cheap! they cant be beat.