The flight box battery isn't the only battery you'll be charging.

While it is decidedly more expensive than a wall-wart, you probably should look into buying a multifunction charger, such as the Great Planes Electrifly Triton.

The Triton is fully automatic in terms of charge termination. It also has manual modes, as do most other high end chargers.

The best thing about the Triton (and other similar chargers) is that it will correctly charge Pb, NiCd, NiMh, Li-Ion, and LiPo batteries.

A good web site to know about is [link=http://www.rcbatteryclinic.com/]Red Scholefield's Battery Clinic.[/link] Several charger reviews, and battery wisdom dispensed by a battery engineer.