Model: Bosch 18V Starter Kit Set Bosch Lithium Ion Battery Cool Pack 18Vx4.0Ah (2pcs) & Fast Charger AL1860CV. Features for Bosch Lithium Ion Battery Cool Pack 18Vx4.0Ah (Model: 1600A00163) Up to 65% longer runtime (cf. 3.0/4.0 Ah battery). CoolPack technology for up to 100% longer lifetime (cf. battery without CoolPack). Bosch flexible power system – battery suitable for all tools in one voltage class. Extremely robust: fully functional even after a 3-m drop onto concrete. Specifications Battery Voltage 18 Volts Battery Capacity 4.0 Ah Weight 600 grams Dimensions (L x W x H) 115mm x 74mm 56mm