I've noticed that my iPhone and iPad are only charging at about 7.5W when I use USB-A chargers. I've read online that while Apple devices don't support fast charging through USB-A, they should still be able to utilize up to 12W with a 5V output via USB-A. I've tried using two different power banks and three different chargers, all of which can deliver a minimum of 15W through USB-A, but the devices still show only 7W charging. I've tested three different cables as well. My older Lightning devices charged without issues at 15W with USB-A, so I'm wondering if there's a limitation with USB-C on Apple's side that restricts charging speeds due to a lack of communication typical of USB-C systems. I could have sworn that my old iPad with a USB-C port used to charge at 15W with the same setup I have now. Is it common for USB-C devices to charge at just 7.5W when using USB-A, or do I need specific cables to get better performance?
1 Answer
It's not just the cable you need to think about; you also have to consider the charging brick. Make sure to check how many watts it's really supplying because the most you'll get is what the brick can deliver.
Thanks for the reply! Like I mentioned, every brick I'm using can supply at least 15W through USB-A. Still, it seems like this issue is resolved now. Apparently, Apple limits USB-A charging to 7.5W on USB-C devices regardless of other factors.