With a 10,400mAh rechargeable lithium-ion battery onboard, the Tylt Energi+ can fully charge a smartphone four times or fully charge a tablet one time, before needing to be recharged. The Energi+ offers 13 pockets and more than 1,450 cubic inches of storage space — enough to accommodate a laptop up to 15.5 inches and a whole bunch more. Power can be routed to seven storage areas, charging up to three devices simultaneously. The bag itself is water-resistant and features a checkpoint-friendly design. Among this backpack's unique features is the shoulder strap that hides an NFC tag and works with the programmable, free app called Tagstand, which can be set to activate specific settings when your Android phone is stowed in the bag. For instance, you can set it to automatically raise the volume on your ringer and turn off Wi-Fi.