I read on at least on website that the Mini3/4 batteries would be compatible. That was a shock. Can't confirm. Also can't buy a Mini 5. I have 9 DJI drones and I could get the 5 but it would be a tradeoff. I'd probably lose my wife...tough call...
Now might be a good time to explore the props over at MAS and see if they give you a different or better experience: Master Airscrew Propellers | Extreme Performance and Efficiency