Once you have gotten hooked on the ease and fun of using an underwater scooter, you're going to want to use them a lot. Don't let your enjoyment be cut short because you ran out of juice. This See Doo Replacement battery or better yet, this spare back-up will double your diving time whenever you use your GTI V&S Scooter. Each battery gives you up to 90 minutes of run time. 12V 12Ah battery.