Features:
--100% brand new and high quality.
--Universal Portable USB Emergency 2 AA Battery Extender Charger Power Bank Supply Box For Phone Mobile Phone MP3 MP4 White
--This AA Battery Extender has the power you need to keep your Smartphone running during
your air travel, camping, road trips or anywhere else you could face the prospect of a dead battery
--High power efficent regulated output for Power and Charging your Smartphone
--Mechanical safety design protecting your Smartphone from insertion of batteries with reversed polarity
LED power indicator
--Pocket-sized for easy carrying

Technical parameters:
-The design is based on two batteries, the most common 5 /AA battery
-Built-in protection circuit, when the battery in the charger is exhausted or the device is full of lithium battery, the charger automatically disconnect and stop charging!
-Built-in DC-DC boost circuit, conversion efficiency of 88%~ 93%
-Input voltage: 2.0-3.0V
- Output voltage: 5.0V
- Output current: 1000MA

Specification:
Type:Battery Extender Charger 
Material:plastic
Size:83*37*22mm
Color:white/black

Package Contents: 1*Battery Extender Charger  (not include battery)