Mini-cell V391 183286 Vartas mini cells provide energy for f.inst. pocket calculators, cameras, watches, car alarms and electronic games and function also as a back-up battery in DVD-players and video maschines. Specifications: Type: V391 / SR55 Chemical system: silver oxide Voltage: 1,55 volt Capacity: 40 mAh Package: 1 pcs Diameter: 11,6 mm Height: 2,1 mm