The ansmann energy 16 plus is a charger and maintenance device for use with aaa aa c d and 9v e nimh or nicd batteries the energy 16 plus can charge 1 12 aaa or aa nimh batteries 1 6 c or d or 1 2 9v block pp3 type batteries the device includes an automatic refreshing function 2 usb charging sockets for charging an mp3 player or mobile phone and the status of charge can be monitored by the built in led indicators green over 80 orange between 25 80 red under 25 of charge uk