Are Wireless Chargers and Headphones Safe?

Technology is becoming more convenient. Some gadgets are wireless so that the average user doesn’t need additional cables if they’d like to listen to music or charge a smartphone. Although it might feel more comfortable, is it safe? Let’s find out how wireless technology works.

Wireless chargers: do you need them?

Inductive charging is the most common type of wireless charging. It is so popular that even if a smartphone does not have a wireless charging function, users can buy chips which change this by placing the device on a corresponding pad. Inductive charging creates an electromagnetic field around a transmitter, which is hidden in a charger. This field is picked up by a receiver, which is in the device. Power is wirelessly transferred from the base to the mobile phone.

Expert opinions on this system are divided, some have confirmed that the amount of EMF produced by chargers is too minimal to be harmful and others still place emphasis on the negative impact of non-ionizing radiation. Although it is true that small amounts of EMF are not going to make you ill immediately, long-term mobile phone radiation exposure isn’t a good idea.

When you use a wireless charger your level of exposure is higher. When you check manufacturers’ websites, you should find a Frequently Asked Questions (FAQ) section. The answer to the question: ‘How much radiation does this product emit?” is not usually a numerical one. It’s unlikely that you’ll find a measurement and they’re essentially just asking you to trust them.

Try not to place your body near the inductive charger. Although charging your smartphone while you sleep is practical, it is important not to do this in your bedroom. Wireless technology is not as new as you may think. In 1899, the inventor Nikola Tesla started performing the first successful experiments on wireless power transfer.

He strongly believed that it would be possible to transmit power without any cables. His idea is a reality today over one hundred years later, but not exactly as expected. When you want to use a wireless charger, you will still need a cable. A pad with a transmitter has to be wired meaning only your mobile phone is free of cables. We are not keen on this solution.

When we are able to put a small device in our home which enables all of our mobile devices to be charged continuously and wirelessly, it will be a problem. Our advice is to limit wireless electronic devices in your household and not to multiply them if they are not necessary.

Wireless headphones: are they safer to use than corded ones?

The answer to this question is no. Do you remember what happened when one of the most popular smartphone brands removed the audio jack from their latest phone? People were surprised, they felt as though they were being forced to use wireless headphones. The brand, of course, released their own model of wireless headphones as a solution to their lack of audio jack. Some users were concerned about radiation exposure.

There is an issue relating to the use of a transmitter and a receiver. Between them, an electromagnetic field is created, in the middle of which is your head and body. You won’t see any difference in the short term but over time exposure might make a difference. One tip to reduce your exposure is to use headphones with a built-in microphone when speaking on your mobile phone. It’s best to stick to regular, corded headphones rather than wireless ones.

We are surrounded by radiation, it’s everywhere, especially in cities with so many WIFi hotspots.

The number of wireless headphones sold worldwide has just increased (from 236 million in 2013 to an estimated 334 million in 2016[1]). The long-term risks of using Bluetooth connected devices is not easily predicted. As Dr. Joel Moskowitz, a professor at the UC Berkeley School of Public Health stated in one interview: “We are playing fire here. Although we don’t know the long-term risks from using Bluetooth devices, why would anyone insert microwave-emitting devices in their ears near their brain when there are safer ways to use a [mobile] phone?”.  

If you want to keep up to date with us and our articles (or follow what we’re doing in general) then you can find us via Facebook: Slow Digital


[1]Statista (2017) Global unit sales of headphones and headsets from 2013 to 2017 (in millions) [Online] (Accessed 19/10/2017)

All images used are CC0 1.0 Universal (CC0 1.0).