We're back to battery, because no one wants a phone that can't be used. Portable battery packs are becoming increasingly more popular as of late, but my favorite brand remains Anker. They make high capacity battery options that will recharge the Moto X 4-6 times on a single charge, last forever, are small, and aren't super expensive.
They have a brand new 20,000 mAh portable battery that is roughly the size of the Moto X, but a little fatter, and will recharge the 3,000 mAh battery multiple times while on the go. It's small, and even supports the same "Quick Charging" we keep talking about. It's one of my favorites, and you'll want one. It has three outputs to charge multiple devices at once.
Buy it Now for $39.99 on Amazon