If you choose to disable animations, however, it will take away some of the load on the CPU/GPU, so that will definitely help decrease lag on systems with lower resources.

Is it good to disable animations?

I’ve recently learned that turning off all animations that you then get a faster performing device which now with every phone I get I turn on developer options in settings and go into it and turn off my animations. It definitely makes a huge difference when opening up apps and speed.

Does turning off Android animations save battery?

Turning off vibrations and animations might give you more battery, but at the expense of a smooth Android experience. I had much more success with limiting animations (a series of buttons that can be found by enabling Developer options in Settings), adding 1-2 hours to my battery.