Powerex MH-C204U-04IGS Compact USB Charger with 4 AA, 2400mAh Imedion Batteries

The MH-C204U Compact USB Charger for AA /AAA NiMH Batteries charges up to 4 AA or AAA nickel-metal hydride (NiMH) rechargeable batteries. You can charge 2 or 4 batteries in about 4 hours.  This charger uses a micro-USB connector as power input using the supplied 5V/1A USB wall adapter.  The MH-C204U is equipped with a negative delta V microprocessor for precision charging to ensure batteries reach their full capacities without becoming overcharged. The Powerex MH-C204U Compact Travel Charger can also provide a 5V/1A USB output using 4 charged AA or AAA batteries. This way, you can have a power boost when your USB powered device such as your phone is low on battery. The charger is great for use in the home or office, as well as in the car (car adapter required, sold separately).