Whether you are using version 3.5 or the newer coconutBattery 4 , the core benefits remain the same:

It shows you the exact mAh your battery had when it left the factory versus what it can hold today.

You can save "snapshots" of your battery health over time to see exactly when and how fast it’s degrading. Why Not Just Use macOS Settings? by coconut-flavour.com - coconutBattery 4

While Apple removed certain battery APIs for third-party iOS apps, coconutBattery bridged the gap by reading low-level health data via a USB connection to your Mac.