Wentronic MP f/ ERI T18S/T10/788 800mAh NiMH. Battery technology: Nickel–Metal Hydride (NiMH), Battery capacity: 800 mAh, Battery voltage: 4.8 V. Weight: 70 g. Colour of product: Black. Dimensions (WxDxH): 59 x 48 x 12 mm