The Bosch 18V 5.5Ah ProCORE Battery Pack is designed and manufactured to be a high-performance output battery that can supply the equivilent of corded power. Fitted with the latest cell technology to increase the performance and life of the battery delivering 87% more power than a conventional battery. This battery is also equipped with COOLPACK 2.0 technology which allows for superior heat dissipation for 135% longer life than regular batteries. Features: Latest cell technology designed to increase performance and durability Compatible with all 18v power tools and chargers Improved cooling technology Charge level indicator Specification: Voltage: 18 Battery capacity (Ah): 5.5 Weight (G): 955