Most mini vibes, mini bullets, small wireless sex toys and discreet stimulators run on button cell batteries, which may be difficult to find at the store. This ten pack of AG-13 style "watch" cell batteries from lady calston will keep your mini vibes running strong for lots of fun! Even if your toy comes with a set of batteries, it's always a good idea to have backups for uninterrupted pleasure. Type: Batteries Style: AG-13 Watch Cell Count: 10