USB Wall Charger Block,USB Charger Adapter,AILKIN 5V/2.1A/4Pack Wall Charger Block Fast Charging Station Power Base Charger Block Plug Brick for iPhone Wall Charger

this is the best plug in charger ive found thus far, it alows a fast charge, i have multiple different mp3 players and thought they were damaged as they would not charge fully and would get warm when charging, until i hooked them to this adapter, no more warmth and gets fully chargede, i leave 2 phones plugged in most of the day and so far not a problem with overcharging or getting warm. i purchased more of these only because when i find something that works this good im afraid they will stop making them.