Hamilton Devices THE SHIV - Switchable 510T Cartridge BatteryHamilton Devices THE SHIV Switchable 510T Cartridge Battery Hamilton Devices is proud to present THE SHIV our first ever switchblade battery! The Shiv is equipped with a switchblade mechanism, which offers discretion for the user. Its stealth design makes it an instant hit with all types of people. THE SHIVs small size makes it portable, but dont be fooled by the batterys size it works with both 0. 5 ml and 1. 0 ml cartridges. This battery is