I just bought a really nice backpack and it has a USB charger to plug in my phone. How do I use it though? - Quora
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BOOTSTRAPT 15 in. Contractor's Backpack with Integrated Power Bank Compartment and Waterproof Rain Cover 006-550 - The Home Depot
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FILSIM® Laptop Backpack Laptop Tablet USB Port for Power Bank Backpack Waterproof with Carry Strap for Trolley Carry On Luggage, gray : Amazon.de: Computer & Accessories
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