Technical Parameters: 

Workingtemperature: Below 40 degree

Input: 5V / 1A

Output: 5V /1A-2.1A

Batteries: polymerbatteries

Features: Dual USBOutput

Size: 153 * 76 *9.8 mm

Box size: 215 *110 * 27mm

Input chargingtime: 8-10 hours.

Product Weight: 237g

Gross Weight:275g

Color: Gold,Silver, Blue ,Black, Pink

Battery Capacity:8000mAh/3.7v

We declare the realcapacity for all power banks we sell . Below steps will help you to caculate how many times you can charger your phone .

Number of chargesequals = (Power capacity of Power Bank* battery conversion efficiency* phoneinner core conversion efficiency (80%))/ the capacity of mobile phone battery

Take iPhone6 forexample:

Capacity of PowerBank:8000mAh

power bankconversion efficiency: 3.7V/5V

Phone inner core conversionefficiency: 80%

The capacity ofiPhone6 battery: 1810 mAh

(8000mAhx3.7/5*80%)/1810=3.2

So 8000mAh Powerbank, the total Number of Charger of iPhone6 is about 3 times,the workingcapacity is 5920mah . 

Color:Gold ,Silver, Blue ,Black, Pink

Package listing: 

1x 8000mAh powerbank

1x usb cable

1x Retail box