The perfect match for our 510 cartridges!! (note this is the Battery ONLY)
We worked hard to bring you these high quality 510 pens at a price well below the 15 dollars American they retail for. 
These 350mah, USB rechargable 510 batteries have a preheat function, last 4-6 hours under normal use between charges and have a quick recharge rate.
These have name brand lithium battery cells inside that are rated to maintain 90% of their capacity after 1000 charges!!