By gilstanden on March 12, 2026

Totally happy with my spare battery for my Jupiter Defiant ST.! I found a great bike bag on Amazon that is a rear rack bag, but also can be instantly removed from the bike and used as a backpack so that I can take the spare battery with me when I'm away from the bike. The Rainsmore bike bag on Amazon: https://a.co/d/03nIBetj