Product Specifications:
Battery Type: Li-ion battery
Batteries: 3.7V/1800mAh
Input: DC 5.0V/1.8mA (max)
Output: DC 5.0V/0.5A ~ 1.2mA (max)
Size: 122.00x 68.00x 15.00mm 

Product performance:
Built-in input interface (MICRO)
Output: the bomb dot matrix
High-capacity lithium battery, to 1800 mAh.
Intelligent charging system, the conversion rate of more than 96%.
An external power adapter can simultaneously charge the phone
Compatibility, common to most cell phones and digital consumer electronics products.

Our advantages:
1.It is compatible for  Blackberry 9790 without the need to get an external devices 
2.Big Capacity:1800mAh, which enables Phone 350 standby hours, or support 12 talking hours, 6 hours on 3G network, 7 3.hours power supply on Wi-Fi, 28 hours audio playing and 8 hours video playing.
4.The power belt clip uses high strength materials, arc-type fitting design, fashion color and highlighting piano surface, with 5.charge and protects shell two in one function