I wonder why is it so difficult to find data on power consumption of the most projects, Elektor or otherwise.
Recently I wanted to find out how feasible it would be to power a Raspberry board with batteries, as I thought it would make for a smart outdoor solution. Few hours later I was (almost) certain it was not what I want, as it draws more current than the rest of the stuff I carry around. Average power consumption of Raspberry is still a mystery to me. Anyway, a no-go.
Next I looked for information on power consumption of devices published in Elektor and other magazines. I'm not into conspiracy theories, but for the most projects it is a well kept secret.
I like my electronics on the go, and it means batteries. In case of 12V supplies it means lots of batteries. Feeding some power hog means a ridiculous pile of batteries.