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
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.