If you have an old MacBook or iPhone and your OS getting slower than you might already tried to update everything and check why everything is so slow.
A good test is Geekbench (0.99$) which is also available on Android. The app is here and there free to grab. It’s a neat little benchmark tool to show how fast (or slow) your overall device performance is.
Now we check the battery and boom! Better score!?
iPhone batteries are $49-$59 so you have to decide if it’s worth or not. I still find it ridiculous that a xyz $ product gets a bad battery which might explode or slows down the phone… .
- Can battery status “replace now” cause Macbook pro to slowdown? (Apple Forum)