Wentronic MP f/ ALC OT300/301/303 650mAh NIMH SB. Battery technology: Nickel–Metal Hydride (NiMH), Battery capacity: 650 mAh, Battery voltage: 3.7 V. Weight: 46 g. Colour of product: Blue. Dimensions (WxDxH): 52 x 35 x 12 mm