Energizer 2-Pack HR6-2300. Battery technology: Nickel–Metal Hydride (NiMH), Battery capacity: 2300 mAh, Battery voltage: 1.2 V. Weight: 28 g, Height: 50.5 mm, Diameter: 14.5 mm. Colour of product: Green, Silver. Operating temperature range (T-T): 0 - 50 °C, Storage temperature range (T-T): -20 - 30 °C, Operating relative humidity range: 0 - 65 %. Certification: CE