iphone 12 Pro Max 2 seconds charging delay

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.

As you didn’t bother to read the thread you posted to, it is normal. The iPhone 12 is different from other models in that it has 7 different charging options*. When you connect it to a charge source it must identify the source, then tell the source what voltage and current the phone wants from the source. This “negotiation” takes a couple of seconds.

1. USB-A, 5 watts to 12 watts (or more, but the most it can use is 12 watts)
2. USB-C with 13 watt charger
3. USB-C with 20 watt Apple charger (has special mode for the 12 series)
4. USB-C with any other USB-C power source (61 watt, 90 watt, etc)
5. Qi 7.5 watt wireless
6. Qi 15 watt wireless
7. Apple MagSafe

Each of these has different charging requirements.

Hi! So I just upgraded my phone from iPhone XR to iPhone 12 Pro and I happen to run in the same issue: experiencing 2 second delay upon plugging my charger to my device. As I scan through the comments, I was also on chat with Apple Support and sent them this thread for review.

They told me it was perfectly normal and that this is nothing to be worried about.

Attaching a screenshot of our conversation for everyone’s peace of mind.

Hope this helps!

Let’s try again: Your iPhone 7 only worked with one kind of charger (a USB 3.1 standard 5 volt 1 amp or more power source), so when you plugged it in it started charging. An iPhone 12 works with several different kinds of chargers. When you plug in a charger (or connect to a wireless charger) the phone must figure out what kind of charger it is, configure the phone for the specific power source, then “tell” the charger what voltage and current to supply. In addition to a standard 5 volt USB power source, it works with three types of wireless chargers (7.5 watt Qi, 15 watt Qi and Apple’s MagSafe 15 watt), with a 13 watt to 19 watt USC-C power source, a 20 watt Apple USB USB-C power source specifically designed for the iPhone 12 series, and higher power MacBook power sources. Each of these USB-C power sources can supply several different voltage/current pairs. So the phone needs to take a couple of seconds to configure the charging protocol. If the delay before it starts charging is the most important feature of the phone for you then get rid of the phone and get one that only works with one kind of power source. Which is becoming increasingly difficult, as all current generation phones from all manufacturers work the same way.

UPDATE: I spoke to apple care and went to a apple care tech support in person.

The apple care support team told me that they find nothing wrong with my phone when they run analytics. They say everything is perfect when it comes to hardware and battery life. So they booked me a in person appointment with tech support to have hands on help.

The tech support found nothing wrong with my phone! HOWEVER, they explained to me that the new iPhone 12 Pro Max Is build differently than any other iPhone. It is build to protect itself so when you input your charger the phone takes a few seconds to detect if there is any moister on the charger.

still would like it to be faster though when it comes to detecting my charger!!!!

Hello perfectworld9,

It sounds like you're experiencing some issues with charging your iPhone. We will be happy to help.

You have done some excellent troubleshooting so far. You mentioned that you had tried another lightning cable in your car and that it was instantaneous. Have you tried another USB-C cable to see if that helps?

Do the steps in this article help? If your iPhone or iPod touch won't charge

After the two seconds and the charger is recognized, do you experience any other issues charging?

Please let us know.

Regards.

This comment is mainly for ppl that come looking as they had similar results but maybe not the exact same model iPhone. What I understand is that the USB-c-model fast charging blocks are what’s causing the delay, not any model phone. And the delayed response is not limited to jus the 11-12 models. I’ve had an Xs for 2 years now and never seen this delay until I bought the USB-c model fast charging block. It irks me to see ppl still calling this a “problem” or “issue” cuz it’s actually not. It really can’t even be called an inconvenience cuz if that 2 seconds impedes on ur life somehow, man ur prolly missing life having to move that fast. Really in stead of complaining about the delay, we prolly all should say “thank u Apple” for this delay. Cuz they took the time to incorporate a function that will choose, optimize and protect charging for these expensive phones we rely on. 🤙

That’s probably normal; when you plug it in the USB-C power source and the phone “negotiate” charging parameters. If it’s only 2 seconds, and charging works normally after that don’t worry about it.

I have the same problem with my 12 pro. I use the exact same charger from my iPhone 7 that I had before upgrading to the 12 pro. The iPhone 7, when I plugged the charger in, buzzed and showed the charging symbol instantly- with the 12 pro, it has that 2-second delay. I use the same charger, so it isn't the charger, and it charges fine so there really isn't an issue for me, just kind of annoying.

Actually the iPhone 11 Pro Max is shipped with a 18W charging port...not 13W.

I am not sure where you are getting your info.

Also, if this is a concern call apple and ask them to run a test on your phone.

It's just iPhone 11 not Pro or Max, when I bought it came in thin package like 12 and 12 PRO does, and they said it's newest build of iPhone 11's so maybe they did that with 11's too, because i had to buy seperate adapter all I got is USB C to lighting port, but when I use cable from my old iPhone 7 it recognizes it instantly and then when I put charger that I have for 11 (it's 20w fast charging) it has 2 seconds delay but with regular USB it doesn't, so I think they built that system in 11's newest versions and I don't have any isuses with battery or charging everything is okay :) just that small delay and it doesn't bother me at all, I just want to know is that supposed to happen or not for 11's :D

What was their resolve? Call apple?

All of the 12 series phones work the same way. I should probably have said that.

Oh, you should contact apple support for the iPhone 11 Pro Max. When I had that phone it never had a delay. My iPhone 12 Pro Max does though.