HP Powerup Backpack
As its name suggests, the HP Powerup Backpack carries along a backup battery. But it’s not one just suited to your smartphone and smaller devices: the large lithium ion battery within boasts a 22,400mAh capacity, enough to fully charge most HP laptops, though it’ll also easily charge a tablet three times over or a smartphone up to ten times. Your laptop’s power adapter does double duty, also charging the pack when otherwise not in use, and two micro USB cables plus a laptop cable come included to charge several devices simultaneously. It’s also made of coated heavy duty canvas that’s water resistant and contains a pull-out rain cover for even wetter weather.
Find it at Amazon – $200