Hello
I have Mini 4Pro, but what I know some buy the battery from 3 Pro for their 4 Pro because of longer flight times, then your 3 Pro will fly shorter.
The problem is that the battery for the 3 Pro is not available in Germany, so I think the battery for the 4 Pro will also fit the 3 Pro.
Buy one and you have 14 days right of return anyway

Greetings Raimund

No, unfortunately I can confirm this from experience having made a wrong purchase...
Greetings

The battery fits in the Mini 3 and Mini 3 Pro. I bought the Mini 3 Pro and the 4 because, according to research, it has more capacity, is lighter and cheaper than the Mini 3 Pro battery.

yes very good

So it works perfectly for me in the Mini 3 Pro.