Why thought? Even LN nodes on a phone if you put the node always on in the background sucks too much battery. Somethings aren't ideal for a phone, run it on your personal laptop or in an old one and connect with a wallet.
Discussion
One less device. One less thing to worry about. If you're always on the move or don't have a permanent home base, then you are fucked as node runner. 🙂
If I can't carry my node with me everywhere, 24/7, then I can't protect it. I guess a small laptop or tablet might just be the solution i need. But having the node on the phone would make things a lot easier.