We review Powerbag , a line of battery-equipped shoulder bags and backpacks . The Best Backpack for Your Laptop or Tablet Unlike solar-powered bags , you can hardly tell it 's a geek accessory . Powerbag spokesman : The battery was rigorously tested for safety .
We review Powerbag , a line of battery-equipped shoulder bags and backpacks . A full battery charge can fill up about two smartphones . Unlike solar-powered bags , you can hardly tell it 's a geek accessory . Powerbag spokesman : The battery was rigorously tested for safety .