How much power does a device actually need?

18 February 2018

In all the excitement about wireless power technology, the amount of power that a device needs to operate is sometimes forgotten.

Different devices need different amounts of power to operate or charge. Here are a few typical power consumption values, expressed in watts:

Smoke detector0.0001 Watt
Wireless motion sensor0.03 Watt
Smart door lock0.1 Watt
Nest smart thermostat1 Watt
Smartphone2 Watt
Wireless security camera3 Watt
Toy drone5 Watt
Wireless surround speaker10 Watt
LED light20 Watt
Notebook PC40 Watt
LED TV75 Watt
Refrigerator150 Watt
Electric vehicle10000 Watt


When choosing wireless power technology for your devices, it is wise to match their power consumption with the technology that can deliver those amounts of power. If your wireless technology can only deliver a few milliwatts, it might be useless to power the devices that you have in mind.

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