Stormin Mormon wrote:
On 2/18/2016 11:23 AM, philo wrote:

I don't have a watt meter so if I want to check power, I run the device
off my UPS and simply measure battery current and multiply by it's
voltage, then figure the device is using 90% of that

Didn't I remember you're an electrician, or
a big battery guy? No clamp on ammeter?

New ones have better high efficiency power supplies. Electronic
components are getting smaller and smaller increasing circuit density.
So of course new ones use energy considerable less. That points to
it also depends on product quality.