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iphone 12 Pro Max 2 seconds charging delay

Been having this issue ever since the first day I received my brand new iphone 12 Pro Max. Using the USB C to Lightning cable that came with the package, and pairing it with Apple 20W USB-C power adapter, when I plug it in there's like a 2 seconds delay before my iphone recognizes it and vibrates and charging symbol appears. I'm now using iOS 14.3, same issue. It definitely takes longer than normal to recognize and start the charging. Checked charging port, it's clean no dust or debris. Tested plugging directly into the wall outlet, same issue. Used an Apple 29W charger brick, same issue. Tried shutting down and restarting my iphone 12 Pro Max, same issue. Tested my iphone 12 Pro Max with an Apple 5W charger brick and the charging starts instantly. Plugged in with my lightning cable in my car, and the charging was instantaneous. What could be causing this issue? is this a software issue?

iPhone 12 Pro Max, iOS 14

Posted on Dec 20, 2020 2:57 PM

Top-ranking reply

Lawrence Finch

Level 10

213,642 points

Posted on Dec 23, 2020 9:02 AM

I guess I wasn’t clear enough. The 20W USB-C adapter negotiates with the phone to determine the voltage and current that the phone needs; that takes a second or two. USB-A adapters have only one current and one voltage setting, so they don’t need to do that. But you have to allow time for the phone and the adapter to choose the right parameters if you are using a 20 Watt USB-C adapter.

Try charging the 12 using the charger that came with your iPhone 8. I’m willing to bet there will be no delay because it doesn’t need to negotiate the charging parameters.

If the 2 second delay really bothers you don’t use the 20 watt adapter, and there will be no delay.

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iphone 12 Pro Max 2 seconds charging delay

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