Slimline pack design, extended run time. Clik-lok connector, Specs: Battery type Ni-Cd Ni-Cd, charging time. one hr approx. Applicable charger: RW2802, RW2803, RW2804... POWER TANK CORDLESS TOOL BATTERIES Ni-CD. Volts : 18. For Shop Series Tools Slimline pack design, extended run time.