Kingsons KS3140 Men Women Laptop Backpack with USB Charge Multi-function Waterproof Business Leisure Travel School Bag Backpack

Kingsons KS3140 Men Women Laptop Backpack with USB Charge Multi-function Waterproof Business Leisure Travel School Bag Backpack

Size:  Model A-13.3 inches (27cm*16cm*43.5cm)

          Model A-15.6 inches (31cm*19cm*46cm) 

          Model A-17.3 inches (37cm* 22cm*50cm)

          Model B 15.6 inches (30cm*13cm*46cm)

Note:the backpack is just with a removable  quick chaging usb data cable,

there is no power bank (mobile battery) inside. 

Note: There is no mobile power comes with the backpack inside.

If you want to use External USB Charge Function, you have to do as follows:

1.Buy a mobile power 

2.Connect your mobile power with the USB interface inside the backpack  

3.Connect your phone with the USB interface outside the backpack

4.Charging begins.

There are 2 kinds of mobile power in the market.

1:Plug in your phone, you can start charging

2:Plug in your phone also need to press button of mobile power then start charging

To cope with this backpack, we suggest purchase of the first mobile power.