Mercury Emergency AA Battery Powered USB Power Bank 800mA

This compact, portable USB power bank allows devices to be charged from 4 AA batteries while on the move. Ideal for smartphones, tablet computers and many other devices. We have managed to charge our i-phone from 0 to over 70% on one set of AA alkaline batteries. features Powered by 4 AA batteries Features a battery level indicator (green for alkaline and blue for rechargeable) Power supply: 4 x AA batteries (not supplied) Output voltage: 5Vdc Output current: 800mA Dimensions: 79 x 34 x 34mm Weight: 40g