Features
pocket battery charger powered by USB port
charges 1 to 2 AA or AAA NiMH or NiCd batteries
possibility to charge through a 5V USB port or through a mobile phone charger (depending on model)
with battery charging LED indication
4 x NiMH 2500mAh AA batteries included (HR6C/25B)

Specifications
charging time:
NiMH AA: 2500mAh => 12hrs
NiCd AA: 900mAh => 5hrs
NiMH AAA: 900mAH => 10hrs
NiCd AAA: 300mAh => 3.5hrs
the charging time will vary according to the batteries' maximum capacity, the charge conditions and the amount of capacity left in each battery
power supply: 5VDC / 500mA
output:
2 x (1.4VDC / 220mA) (AA size)
2 x (1.4VDC / 100mA) (AAA size)
operating temperature: 32°F ~104°F
storage temperature: -4°F ~ 140°F
dimensions: 3 5/16" x 1 11/32" x 1 9/64"
weight: 1 1/2 lbs.