Power requirements for wireless headmount?

[Jakey]

I would like to buy spare power banks for my wireless vive pro kit.

To ensure I purchase the correct power banks, can someone please tell me the voltage and current requirements for the wireless head mount?

Thanks

[HackPerception]

@Jakey - the primary requirement is that it needs to be Qualcomm QC 3.0+ compatible. If it's not certified QC3.0 (or 4.0) the adapter & the HMD will not work. QC3.0 is more than a set of specifications surrounding voltage and current, it's an embedded technology stack that the wireless adapter is built around. Try only purchasing external batteries from reputable brands - that said, QC3.0 is a certification backed by Qualcomm which will eliminate most of the sketchy and questionable batteries.