You might be lamenting the single USB-C port on the new MacBook. But one of the good things about this universal port is you can now charge the MacBook with a portable battery pack. You could do it before with the MagSafe-equipped MacBooks but you needed specific battery packs or a modified MagSafe adapter. Now, you can use any high-capacity battery pack. Just make sure you have a USB-C to USB-A cable and you're good to go. Apple promises nine to 10 hours of use with the new MacBook. But if you have a high-capacity power bank, you could just extend that further. 

Source: Mashable