http://www3.towerhobbies.com/cgi-bin...3p?&C=PKJ&P=ML
these are mostly all small and light. Stay over 15amps if you plan on using one charger at a time and you'll be able to charge just about anything you want. I only use that old 60 pound beast at home because it was free and I can run 4 chargers at the same time.