Product basic info Primary colours: Grey Primary detailed colours: Metallic silver Diameter unit: 7.8 mm Depth unit: 5.35 mm Weight unit: 10 g Physical properties Number of pieces: 8 Technical data Battery capacity: 290 mAh Power supply Battery voltage rating: 1.45 V Battery composition: Zincâ€"Air Battery IEC size: PR48 (7002ZD, Orange tab, ZA13 ) (EN)