The new MacBook Pro has a very cool trick you may not be aware of. In addition to those USB-C ports being the future of connectivity, they can also charge your computer. That means you now have four different ports to charge from! And maybe the best part: you don’t need to plug in. Those ports also accept charges from battery packs, which makes your new MacBook Pro the ultimate in portability. Here are a few packs you should consider slipping in your bag.