Originally Posted by froggie22

No not quite.

An AC charger has a power supply built it. (1 that plugs straight into the wall)

A DC charger needs a separate power supply (or a big 12-20v battery) as it does not have one built in.
By making a charger DC, manufactures can reduce the size of the charger and not limit themselves to small built in power supplies.

So if you have an AC charger, a power supply will do nothing for you.