Red, simple and ready to go. This Hi*AF battery is a rechargeable 510 thread vape battery in a bold red finish that's easy to find in a bag or on a nightstand. Thread on any standard 510 cartridge and you're set, and keep a spare charged if you're out all day. A bright color makes it easy to tell apart from a friend's. Store it at room temperature and away from direct sun. Wipe the connection now and then with a dry cotton swab to keep it clean.