WING wireless charger power bank for mobile phone smart phone mobile  dual usb power bank dual output mobile charger ViVi Since 1988.Along with the smart phone commonly used ,ViVi  R&D department focus on 

design the smart devices (best pwoer bank ) suit for customers.  

OEM/ODM Welcome 

VIVIpowerbank portable charger power bank 4000mah external battery charger best portable Wing power bank

Skype: haipaitesales05

How to self-charging

1. Use the Built-in USB 2.0 cable to plug it into the wall charger or Laptop

2. Use the extra USB cable plug into the input Micro USB port, then connect with wall charger or Laptop

3 By original charging cable with micro USB port

PS: Blue LED indicator will keep flashing until fully charged. Each LED represent 25% power

Press the button to check power remaining.

How to use USB Power Bank to charge your electronic devices

1. Built-in Apple 30pin to charge iPhone4/ipod/ipad

2. Built-in Micro USB to charge Samsung HTC and other smart phones

3. Use your phone original cable to charge your devices.

PS: Our WING power bank can charge 3 devices at the same time