There are no reasonably priced AC/DC powered multiple battery chargers. The Graupner I'm aware of is about $500. The Hyperion Duo3 is a true dual charger with 2 separate ports allowing it to charge 2 batts at once. The iMax Quattro is a 4 port type charger and will charge 4 batteries at once. There is quite a contrast in charger output power and cost between the two.

Hyperion -

http://www.allerc.com/hyperion-eos06...er-p-4632.html

iMax Quattro type charger as sold by HobbyKing -

http://www.hobbycity.com/hobbycity/s...dProduct=10327

You'll need a separate power supply with either of these.


Since you're only charging 2S lipos, there is one other - it has some limitations, designed for 3000mah or smaller 2S only -

http://www.hobbycity.com/hobbycity/s...dProduct=10707