I've used Amazon/Blink Lithium battery powered cameras for about 4 years now and not only have they been fantastic but they last about 2 years per battery replacement.
I have 1 in the house, 1 in the garden and 2 in my garage. We're about to move house and will be looking for a possible switch up to PoE cameras in the near future but until I make up my mind, the Blink ones will be here to stay and I will need to add 1-2 more.
The app on my phone works great and they're times so they really are set and forget.