Features:

• Battery charger; charges AA and AAA batteries simultaneously
• 4 separate LCD displays; 4 modes; heat monitor prevents overcharging
• Comes with 4 AA and 4 AAA rechargeable batteries
• Also includes 4 C- and 4 D-size battery adapters and durable travel bag
• Measures 5.1 by 3 by 1.5 inches

Editor Reviews:

Product Description:
Works with all NiCd and NiMH AA and AAA Rechargeable Batteries LCD shows capacity for each battery when charging is complete Charges AA & AAA rechargeable batteries simultaneously Will not charge defective batteries Select different charging current for each channel Automatically switches to trickle charge when charging is complete to ensure maximum battery capacity Automatically defaults to 200mA charge (the optimal setting for prolonging battery life) Overheat detection to protect over-charging 7 Easy to Use Function Keys Charge Mode (charging current) Discharge Mode (discharging current) Refresh Mode (time elapsed) Test Mode (accumulated capacity) Included Accessories: Four AA NiMH 1.2v Batteries Four AAA NiMH 1.2v Batteries Durable Nylon Travel Bag AC Power Adapter Four C Size Battery Adapters Four D Size Battery Adapters

Rating : - An Eco-Geek's dream
I picked this battery charger up after reading Jeff Atwood's great post on rechargeable batteries over at Coding Horror

This charger packs lots of great features in for an incredibly low price: LED display, variable charging current (charge safer or faster) refresh mode, universal input (so it will work in the US, EU, Japan, South America, Africa, and the International Space Station), a carrying case, and even a starter pack of AA and AAA rechargeable batteries.

It is awesome to watch your batteries charge, since you can page through data on each battery including current load, input voltage, and charging time thus far. But the killer app of this charger is refresh mode, where the charger rapidly cycles between discharge and charge, fully draining the battery many times, then finally charging it all the way up. This feature is designed to combat the memory that NiCD and NiMH batteries can build up, and I am happy to report that it has worked as advertised for eight old batteries that I had that would not hold a charge. Now the sets hold 1400mA and 2400mA, respectively (their original capacity rating).

This charger is easy on your wallet, easy on your batteries, and thus easy on the Earth. Eco-Geeks of the world, let your powers combine and... buy this charger. (Wow, I miss Captain Planet!)