[rilut]

I use Mi WiFi Range Extender AC1200 (on AP mode), which consumes 0.3 A (the label only list the ampere instead of watt). I live on 220V AC country, so:

- 220V * 0.3A = 66W

- google "how many hour in a month" = 730 hours

- 66 W / 1000 W * 730 hours = 48.18 kWh / month

I am a bit skeptical about the power that this router use, should be just using around 7W instead of 66W, I am thinking of buying a power meter to get the real power usage. and will change my router if this router really consumes too much electricity

[necovek]

That sounds like way too much. It's more likely it makes use of DC power at 5V or 12V: the fact it has an integrated adapter from AC to DC only means it's harder to figure this out.

A first AC/DC adapter I grabbed has an input of 0.1A at 230V and output of 0.5A at 10V. If your device has got a similar ratio (there is nothing to say it does, though :)), you are looking at 3A at 5V or 15W max.

[rilut]

Agree, listing only 0.1 A without saying at what voltage is is not informative. Recently bought a power meter and it says it actually only consumes 2.4W. I posted my correction on the replies above

[rilut]

Here's my correction. My power meter has just arrived, it says my wifi router only consume 3.0 W at start and then drops to 2.4 W, so:

- google "how many hour in a month" = 730 hours

- 2.4 W / 1000 W * 730 hours = 1.75 kWh / month