portable external battery packs for netbook for mobile phone 8800mAh 4A

Specifications 1.Output voltage : 4 scales

2.Output Capacity: 30Wh

3.Out current:4.2A Max.

4.USB output:5V/1.2A

5.certification:CE,ROSH

I. Application:                             for tablet  PC  / Netbook  / Laptops / MID / MP3 & MP4  / ipad & iphone&ipod /                                Mobile phone II.Function Advantages:   1.Model:MP8800   2.Cell type:Li-Polymer  
  3.Cell Capacity:31Wh(8800~9000mAh)   
  4.Output  port:Two  independent output  port  :1 . DC  OUT   2. USB OUT  
  5.DC OUT Voltage:8.4V,12V,16V,19V (adjustable)   6.DC OUT current:4A( constant );4.2A( Max.)
  7.OUT DC/DC  efficiency:92~94%
  8.DC OUT capacity:30Wh( 8200mAh)  
  9.USB OUT voltage:5.2V
  10.USB OUT current:1.2A( constant );1.5A( Max)
  11.Input Charging Voltage:8~20V 
  12.Charging Time:About  2~3h   
  13.UPS function:with 
  14.Pass through charging:with    15.Size:120.8*75*23.5mm 
  16.Weight:270g  III.Operation panel:          IV.Operation guide:       1. Connection of Back-up Power ( for Outdoors):              2. Connection of pass through charging ( for indoors ):       V.Packing accessories:     VI. Product clear picture: