This is the best charger I have ever used:
Powerex MH-C800S Eight Cell Smart Charger has eight independent slots for AA/AAA batteries. It’s like having eight chargers! It has a deep-cycle conditioning worldwide power supply, a smaller light weight power adapter, and both soft and rapid charging speeds. BATTERIES ARE NOT INCLUDED!
The MH-C800S features eight independent slots that can charge one to eight AA or AAA batteries in any combination in around one to two hours! The unit also incorporates a large, easy-to-read LCD screen featuring the charging status of each battery. This new charger uses the same precision microprocessor as its professional sister, model MH-C801D. The user can choose between a soft and a fast charge mode. The soft charge delivers the highest battery life and allows 100% compatibility with older, lower capacity batteries. The fast charge allows eight batteries to be fully charged to their maximum capacity in as little as one to two hours. The eight-cell charger is embedded with a high-rate battery conditioner that will charge, deep-discharge and recharge batteries automatically for maximum performance. The cycle restores the batteries to their optimal performance level minimizing the memory effect. Batteries that were previously thought ready for the recycle bin can be brought back to life. The MH-C800S can be used anywhere around the world using the included switching AC power supply– perfect for home, office, and travel. – C.G.