An intelligent charger for AA or AAA batteries offering variable charging speeds and LCD readout of charge status. The Powerline 4 Pro charges 1-4 AA or AAA batteries (not included) in any combination. Each cell is individually monitored, with the capacity of each displayed on an LCD screen. Battery condition is also taken care of, helping to prolong cell life, with overheat protection and automatic shutdown in case of a problem. An additional USB socket allows phones and other devices to be either charged simultaneously with the batteries, or from charged batteries in the charger unit (5v 1 amp). It's supplied with UK and euro plugs, but can be used worldwide on voltages 100-240v, and also in-car via the supplied 12v adaptor.