Size: D/LR20 Kinds: Alkaline -Manganese dry battery. Brand: Micropower OEM is welcome Nominal voltage: 1.5V Jacket: Foil Packing: 2pcs in a shrink packing Dimension: 60.5± 0.5 mm � Φ 33.2± 0.8mm Weight: 142g. Discharge time: 2000minutes on the discharge condition of 3.9ohm, 24h/d, discharge to 0.9V. Capacity: 12255mAh, (Discharge: 3.9Ω , 24h/d, to 0.8V, at 20º C± 2º C) Shelf life: 3years. No mercury and cadmium added. Enviromental friendly. Super long lasting power.