This little thing has saved me on more nights out than I can count. The 200mAh holds enough charge to get through a full evening, and it screws onto my 510 cartridges without any wobble.
Alexander D.★★★★★
Charged it up and it's been running my 510 cartridge all evening without dying. The 200mAh holds way longer than I expected for something this tiny, and it screws on snug with no wiggle.
Violet G.★★★★★
This little thing disappears in my pocket and still pushes enough power for a full cartridge, which honestly surprised me. The 510 threading fits all my pens snugly with no wobble, and the 200mAh holds up way longer than I expected for something this tiny.