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 

      1.Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.

      2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.