An excellent solution for power hungry chargers.
The Green Power AC Adapter can supply a constant 25A at 14v, making it perfect for chargers using alot of power to charge big packs fast, or you can hook up 2 or 3 smaller chargers to charge up to 5 or 6S packs each.
Even if you dont charge at high rates, having a solid power supply like this will ensure the charger is supplied with a good constant current, helping it to balance cells and operate better.