Here is a bag with a speaker and power bank built-in that lets you get more out of your smartphone on the move. The Deco Gear Bluetooth Speaker Backpack has a rechargeable 10,000mAh battery and supports wireless streaming. Its 3W speakers provide you with decent sound outside.
The bag is made with 600D polyester canvas. It has a comfortable padded back, insulated drink pocket, and an external charging hub.[where to get it]