A ‘510-thread’ is cannabis jargon for the most common type of vaporizer battery and cartridge fitting. The vast majority of vape cartridges work with 510 thread batteries, as opposed to pod systems. A 510 thread battery shaped like a stubby Bic pen, with a threaded metal top where the cartridge screws on. A 510 thread battery is usually rechargeable—you screw it onto a recharge attachment that plugs into usually a USB port. 510 thread batteries usually start at around $10-$20 dollars.