specfications of power bank 5200mAh
1  input /output 5V 2A
2 weight 425g
3 15*75*120mm
4 used more than 4 years
5 can be widely used
6 Polymer lithium ion 5200mAh
7 Storage temperature is -20°C~+65°C

Input	5V/1A
output	5V/2A
Output voltage	5V
Output current	5200mA
Output power	40wh
Capacity	Polymer lithium ion 5200mAH
Weight	about 425g
Dimension	120*75*15mm
Storage temperature	-20°C~+65°C

Reasons of recommendations

1. Microcomputer intelligent control technology,automatic identification equipment,need to be recharged to ensure full compliance with the charging requirements of the device.

2. Ergonomic design,charming appearance and comfortable touch.

3. Strong power,built-in high-capacity high-quality polymer lithium battery is fully charged one can give more than a dozen device charging.

4. Protection circuit system can prevent from overcharge,overdischarge and short circuit...

5. Small size,light  weight,very easy to carry anywhere ,and packed in your pocket can also be placed in carry -on bag.

6. High compatibility with international standard USB output interface,for various brands of phone series,iphone,ipad,mp4,gps navigator,digital  camera,as well as USB output interface 5v power supply equipment,etc... 

Applications of this good power bank

Apple iphone 3G ,3GS,4 ,4S,

Ipad 1,2

Ipod

Itouch

GPS

PSP

USB music speaker

Bluetooth products

USB AA/AAA battery charger

Digital camera

Tablet PC

Mobile Phone(Nokia ,Samsung ,HTC ,LG ,SonyEricsson etc.