Replace your lost or failed power adapter. This 5V power supply can provide a power source for any electronic device that has a C-type barrel and requires 5volts and up to 4 amps of power. The adapter is a perfect replacement for the lost or damaged power adapter you\'ve used to power your existing electronics. When downtime isn\'t an option, keeping spare power adapters on hand ensures that you won\'t be left waiting for a replacement to arrive or have to replace your devices just for the sake of a compatible power source.