Is there a command to get battery health?

[c0ry]

In an iPhone's Battery settings there is "Battery Health" Maximum Capacity, which will show how degraded the battery is. Is there a command I could run to get this percentage?

I tried idevicediagnostics and that shows FullChargeCapacity, but this is always 100.

Does anyone know where I could get this information via a USB connection without installing an app on the phone?

[a-gunter]

IOReg has this information under different entries depending on the model.

"idevicediagnostics ioregentry AppleARMPMUCharger" for older models (iPhone 7 and older)
"idevicediagnostics ioregentry AppleSmartBattery" for newer models (iPhone 8 and newer)

You can find information about the battery, including design capacity & current capacity

[c0ry]

Thanks, this is showing me a lot more information. Is there documentation somewhere that I can find all the entry names available? Do you know if there is something that could give me the LCD serial number?