High capacity portable battery charger power bank with 20000mAh be charged for iPhone, for Samsung, MP3/4, PSP Android Phones.
Built-in 20000mAh high-quality rechargeable polymer Li-ion battery
Battery indicator displays the accurate percentage of power.
Dual USB Outputs DC 5V / 2.1A output charge for Mobile Phones, Tablet, Camera, Speaker etc.
Ultra-high conversion efficiency (> 80%)
The certified capacity formula is :
output capacity energy=(battery voltage 3.7v*battery capacity 20000mah)*conversion rate/output voltage 5v.
Full charging time(AC power): 10-12 hours.
