Battery/Charging status on Photon2 from Cloud

Is it possible to see battery/charging status of a photon2 from the cloud API interface?

According to this, I should be able to return power status:

But when I GET the diagnostics data, there is no power field present.

I have implement myself using Particle.function but wondered if there was a built in method I have missed?

It is not possible to get the charging status of a Photon 2, either on-device or from the device vitals in the cloud.