You can rechargeable battery with this backpack.
There is USB PORT for Portable secondary battery.
High-quality faux leather school backpacks for men.
USB PORT Rechargeable Faux Leather Backpacks
NOT Included Portable secondary battery and USB connecting Jack
Backpack with attached USB Connecting Port and Cell Phone USB Port
Colors: Grey, Black
Material: Faux Leather
Measurements: Width 43cm/ Height 32cm/ Depth 13cm
Strap Or Handle Style: Adjustable 2 Shoulder Strap
Embellishment: 15" Laptop Sleeve, Outer pocket, USB PORT for Portable secondary battery
Closure: Zipper
Style: Casual, Contemporary, Vintage
Occasions: School, Office, Picnic, Travel, Weekend
Pattern: Solid
Size: Large
