you talking about the chuck, or the little chuck?
chuck uses 18650's, Mah can range from 1800-3000
I use the ultrafire 3000 Mah batts, and heavy vaping all day, I get 2 days+. almost 4 days if just using at night.
little chuck uses 16340's which can be from 300-1000 Mah
Jeff has said...