WattmeterLet's take a look on pretty old (but still working!) ink printer. I have HP Deskjet 845c at home, not using color since a long time, but refilling black ink is very easy. And it's nice to have printer at home. But how much energy does it use ...
Cisco SPA922 is one line IP phone. It uses 4.1W of energy when turned on and ready to use. I didn't check how this changes on call, but phones are usualy in standby mode, so this shouldn't matter.
Let's take a look on router Linksys WRT54GL. Powering on only power supply (old type, transformer one) uses 2.5W of power. No router connected yet.
Then I connected two computers over Wi-Fi connection and plugged ethernet cable from my ISP's modem. Energy use increased to 6.9W ...
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