I love when people go out and actually test the hardware we trust every day. That̵
The evaluation seems so simple that I am surprised that I had not encountered it before. Eric collaborated with the repair guides at iFixit to figure out how much energy a typical wireless charger takes over the much longer time it will probably take to taste your smartphone. He then performed the same evaluation for a standard charging cable and power adapter.
The results? Eric writes:
Charging the phone from completely dead to 100% with a cable took an average of 14.26 watt hours (Wh). Using a wireless charger took an average of 21.01 Wh. It gives just over 47% more energy for the simplicity of not connecting a cable. In other words, the phone had to work harder, generate more heat and absorb more energy when charged wirelessly to fill the battery to the same size. “
Eric also found that how he placed his phone on a wireless charger affected how many watt hours it would take to fully charge his phone. This should not be very surprising to you: If you are a little careless in setting up your device, do not adjust the coils as well as you might be, so it takes more watt hours for your device to charge. If your wireless charger is designed in such a way that it is difficult to ever miss the coils when you rest your phone on the charger, you will probably be more efficient in charging.
But as Eric claims, wireless charging will still be inefficient in most scenarios. And the charger itself also draws power: about 0.25 watts every hour, even if the phone is not on it at all.
However, do not dispose of the wireless chargers yet
Are you going to replace all your wireless chargers with cables? Well, if you need the fastest charge you can get, it would not hurt. As Nick Guy wrote for Nippers last year:
“Qi wireless chargers are slower than wired chargers, completely stop.
The fastest chargers we have measured in our tests charged a fully drained iPhone XR to only 50 percent battery capacity in an hour, about half as fast as a cable charger. But all wireless chargers can still charge all phones overnight. That’s why I also use one on my nightstand. If I wake up in the middle of the night and want to check my phone (bad habit, I know), I do not have to worry about waking up my partner when I fumble to reconnect my phone. “
And if all you care about is energy savings – all that an LED light bulb is worth or so – then wire charging is the way to go, writes Android Central’s Jerry Hildenbrand:
The too long, unread explanation is that the most efficient way to charge the phone is the slowest way: a simple USB-A 5-volt 1-amp charger connected to a short and shock cable connected directly to the phone. It is also a method that most people will never use because it is super slow and speed and convenience matter. “
I think it’s this strategy to take, because it’s important to be aware of the power you use – especially when you think of the bigger picture. Use a wireless charger over a cable charger for your phone will not affect your electricity bill to a noticeable degree. Go without a side of french fries at your favorite fast food place, and you have easily covered what you would have spent on a more inefficient wireless charger.
But if all started using a wireless charger, then we all contribute to a huge resource craving for the little extra convenience of not having to connect anything to charge it. Literally, that’s the only benefit right now of wireless charging: It’s slower, it’s more inefficient, but it does not require you to connect a cable – a process that usually only takes a few seconds, or about as difficult as throwing your recyclables in. a blue compartment instead of a black one.
I would not throw out your wireless charger, because it would probably waste as many resources, if not more, as simply with the charger. But the inefficiency of wireless charging is something to think about in the future. When newer and better wireless chargers arrive, you may want to stick to the cable when it’s not a burden to do so – when working at your desk or sleeping for the night, for example – and use wireless charging for them for a few moments when you need extra convenience or otherwise can not change charging techniques, such as the sleek new wireless charging setting in your car.
And while you’re on it, you do it really Do you need to constantly charge your phone, anyway? Instead of constantly increasing yourself to a 100 percent charge from 80 percent, consider keeping your phone off the charger until you’re ready for the day (or if you really need more battery for a future trip you’re planning). Every little bit helps.