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He was at work so I texted him.

Oh yeah, I turn the heat off when Im not home, he texted back.

Person plugging a charger into an outlet

FanPro / Getty Images

Ha, looks like its 40 degrees inside.

Yes, Dan, I was cold.

But this is how the man lives.

Mecheer electrical usage monitor

The Spruce / Courtney Mason

Unplug that if youre not using it.

Turn off the lights.Turn off the heat.

Air conditioning in summer?

The writer’s brother with his electrical usage monitor

The Spruce / Courtney Mason

You dont need that.

So I wasnt surprised at all when he debuted his new favorite gadget.

I also guess I cant be surprised that it has turned him into an electricity dictator.

Monitoring the electrical usage of a baby monitor

The Spruce / Courtney Mason

Mecheer Home Electrical Usage Monitor

So how does the power meter work?

Dan takes the meter around the house room by room, outlet by outlet, looking for vampire appliances.

He plugs the meter directly into the outlet, and then plugs the appliance-in-question into the meter.

(It only works on standard appliances.

You cant use it on something like an electric vehicle.)

Want more of our favorite products?

A 2015 study showed that about a quarter of your electric bill is due to these vampire appliances.

We waited 22 minutes for the television to reboot and turn on for the Patriots-Bears game.

He recently texted that he cant wait to measure all their Christmas decorations one-by-one.

My sister-in-law had to log a formal petition to get their sons baby monitor back onto the good list.

This tool can help you identify inefficientoutlets for repair(or at minimum, avoidance).

I just ask that you use this information responsibly, and not like a maniac.

Sincerely, your older sister, General Manager of The Spruce.

Energy Vampires: Keep Your Devices from Wasting Energy and Money.

A Guide to Energy Efficient Heating and Cooling.