The Screaming O's lineup of reusable vibes use either AG-13 or AG-10 batteries, both of which are available in specially marked replacement packs sized perfectly for shoppers to pick up and toss in their bags at the point of purchase. These AG-10 batteries power up the company's lineup of smaller vibrating rings, including the AG-10 batteries are used in the BigO, BigO2, BigO Glow, TriO, BongO, BangO, Oman, Tri-O, Octopus and more.