Product basic info Primary colours: Grey Primary detailed colours: Metallic silver Additional colours: Red Diameter unit: 33.3 mm Height unit: 61 mm Weight unit: 538 g Technical data Battery capacity: 21000 mAh Power supply Number of batteries: 4 Battery voltage rating: 1.5 V Battery composition: Alkaline Battery IEC size: D (LR20, R20, HR20, KR20, ZR20 ,13A, 13D, UM1, Mono, MN1300, MX1300) (EN)