Hello there,
As far as I am aware, there is no way to poll bluetooth device data beyond what you would get with Get-WmiObject, since the battery status seen in Windows Settings -> Bluetooth Devices is something coming from the vendors/devices driver and seems to, as of now, be inaccessible by PowerShell, unless there is some exotic snapin I am not aware of.
You can get all possible device information via this command:
Get-WmiObject -Query "select * from win32_PnPEntity"
Where Name -like "MyDeviceName"
Or if you are unsure how the device is named as of now, this would return a complete list of "devices":
Get-WmiObject -Query "select *
Hope this resolves your Query !!
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