The iPad Air functions as an LTE hotspot if you set it up as such. Very cool for internet on the go, but with that, there are almost always battery concerns.
Worry not, because the iPad Air gives you about 24 hours of usage as a personal LTE hotspot. That’s excellent. It’s much more than you get from using the iPad itself. That’s awesome battery life. Perhaps it’s partly because the screen isn’t on (no backlighting) and you’re not using it to process graphics. We don’t know for sure, but that’s awesome. You will likely need to recharge your computer before you drain the battery on your iPad as a hotspot.