> the battery drained too fast

I think this problem was unique to the 12 mini. I remember hearing a lot of people complain about it at the time, and I haven't experienced anything like it with my 13 mini (which I upgraded to from a six-year-old 1st-gen SE, so clearly my usage is not typical; YMMV).

> battery drained too fast.

Battery-saver on all iOS devices.