Can You Wireless Charge With a Case on

Wireless charging is becoming all the rage, and I tin can sympathise why. There'south a convenience to dropping a phone onto a charging pad that yous just don't go from scrabbling nether the bed or desk for the cable then fumbling it into the port. While information technology's non a fast or specially efficient manner to accuse a device, we alive in a time when expediency rules.

But the growing popularity of this applied science has resulted in a few curious readers wondering if a phone instance has any effect on charging.

Time to do some testing.

Some of my test equipment. — Some of my examination equipment.

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For this test, I assembled a pile of test gear, from USB meters, USB meters that tin can run from a wireless charger, power meters, charging pads, and a selection of smartphones and smartphone cases, and I headed over to the PC Dr. HQ to run across what I could discover.

Many days later…

Earlier I dig into the results, a few pointers. None of the test gear I've used is "lab form," and then accuracy might be a piddling varied. That said, I have tested the gear against loads, both fixed resistor loads and electronic loads, and I'1000 comfortable that any errors are small plenty non to thing here.

I likewise used a video camera to fourth dimension how long information technology took the smartphones to charge a fixed corporeality (say from 25% to 75%), which gives me another metric to use.

Equally far as phone cases when, I dipped into my stash and used a choice from companies such as RhinoShield, UAG, and OtterBox. I besides used some cheap no-proper noun silicone cases that claimed to be OK for wireless charging. I didn't use any really thick cases, or whatsoever with metal in them, equally this would skew my results.

So, what's the bottom line? Do cases make a difference?

It makes a divergence, but one and so small that unless you are looking for it, you won't notice it. How much of a departure am I talking about? On boilerplate, the difference was no more than iv minutes to charge a telephone'southward battery by 50%, and normally, it was about half that.

What I did discover was that the wireless charging pad drew more than current from the wall adapter when charging a smartphone in a instance, which indicates that in that location is some additional load of a few tens of milliamps, and suggests that the case does add extra load, but that the charging pad and device can negotiate a higher power draw to compensate.

I did notice one particular combination of device and charging case that caused charging problems: The AirPods Pro case within a Spigen Rugged Armor case. I could get it to work, but I had to get the placement on the charging pad spot on.

I too plant another scenario where wireless charging and smartphone cases don't mix, and that is in hot conditions (or when the room is hot). However, this is down to the case causing the smartphone to overheat, and the battery's thermal regulation circuits to reduce, or sometimes completely cutting off, the charging to drib the temperature.

If I was in a rush to charge up, and wireless charging was my only option, this is about the only scenario where I'd bother to whip the case off my phone.

Ane thing that I didn't try -- which I'd like to in the future -- is whether cheap no-name wireless charging pads are whatever worse than the more expensive, branded pads. I'd also like to try out multi-curlicue pads alongside their single-gyre siblings.

But for now, that'southward enough testing, and at present you know that unless information technology'south hot, keeping your smartphone in its case while it's charging on a wireless charger isn't making much of a difference.

Can You Wireless Charge With a Case on

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