The IMAX B6AC+ is a great charger able to charge, balance and discharge Lion, LiPo, LiFe (A123), NiCd, NiMH, and Pb (lead acid) batteries.
Features: Microprocessor controlled, Delta-peak sensitivity, Individual cell balancing, Li-ion, LiPo and LiFe capable, Ni-Cd and NiMH capable, Large range of charge currents, Storage function, allows safe storage current, Time limit function, Input voltage monitoring. Data storage (Store up to 5 packs in memory), Battery break in and cycling. Our favorite setting, storage. Allows you to charger or discharge your lipos to proper storage voltage. Note: this is the updated version with deans pre-installed.
The B6AC can be powered by plugging it in the wall or use the alligator clips and use another power source such as a charge battery.