There are two Keis ranges: The majority of Keis heated garments are Dual Powered garments, and can be powered from portable Lithium-Ion (Li-Ion) batteries or an external power source, such as a vehicle battery. High Powered garments (currently only the J501RP and J505RP Extreme heated jackets) require an external 12V source, such as a vehicle or stand-alone 12V battery.