Imagine all your household devices like your iPhone, toothbrush and gaming controller being charged through the air at the same time, without any cables in sight. It sounds like magic. Many companies offer three ways to remotely power your device: radio waves, microwaves or infrared light. But what are some of the risks of beaming more energy around you?

I explore whether long-distance wireless charging is safe and why it may be a long time before you have it at home.

0:00 Transmitter for charging
0:22 How this charging works
1:51 Why we are just hearing about this
2:23 Health risks
3:08 When could this tech be in our homes?

I’m Dalvin Brown, a WSJ reporter covering personal technology, which includes the latest smart devices, apps and services making an impact on consumers. Subscribe if you're curious about what the latest tech developments mean for you, or if you want to go behind the scenes to find out what’s powering today's digital services.

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