1.R20 dry battery. 2.Diameter:32.3 34.2mm.3.Height:59.5 61.5mm.4.0.000% mercury and cadmium.5.Continuous discharge time:300mins.6.Packing:2pcs/shrink pack,12pcs or 24pcs/inner box,288pcs/outer carton,1100ctns/20'fcl. Carton dimensions:42.0x28.5x20.5cm. G.W.:24kg.