I've taken an old netbook and started using it as a tiny game server. I have removed the screen, wifi card and reproductors, but the rest is there (battery, fan, sata HDD). It runs 24/7 and charger is plugged in at all times.
I wonder whether it is possible to compute a fairly accurate estimate of an electricity bill for this machine in both idle and maximum usage scenario.
The computer is Asus EEE 1201HA and adapter has 19V~2.1A output. Also is the energy consumption affected by having battery plugged in?