Batteries are the least of your worries with phones.
These days software is almost always mpre problematic than hardware. The phone's OS releases are coded to slowly cripple older phone models by introducing performance degradation to impact earlier models.
If you plan to keep your old OS bd annually doable updates, good luck having any working Apps after a year or two, as updates to firmware will start to lock your device utilities (camera, GPS, etc,) from interacting with the latest App versions properly.
Another witchcraft idea invented by Apple.
And Google enriches us with witch craft like forced scoped storage, breaking compatibility with existing and established software.
The phone's OS releases are coded to slowly cripple older phone models by introducing performance degradation to impact earlier models.
Just good old software that takes advantage of the greater memory of newer phones, causing lots of swapping on older ones. I had an Android phone where every fucking switch between apps took several seconds because it had to re-open the app. Painful as hell to use. Don't ever buy a phone with less than 3 or 4 GB of RAM.
(post is archived)