An essential accessory for anyone who finds themselves out and about without access to a power point. 4000 mAh charging, compatible with all UB 2.00 charging leads, this is an excellent back up power supply for mobiles, Ipads etc. Charges a smartphone in 1 1/2 hours. Charging this device takes 3-4 hours (variable) so once charged, this pocket sized power source can be with you all day in case of emergencies. A great gift for anyone who travels.