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After battery replacement, iPhone refuses to charge when turned on

I have an iPhone XS max on which I did the battery replacement and the charging port replacement.

When the phone is on, the phone detects a cable is plugged in or it has been placed on the wireless charger, the charging symbol can be seen; but battery continues to drain.

I originally thought this was a battery issue, so i ordered yet another replacement battery.

The only way around it, I've found, is to place the phone on a wireless charger and then turn the phone off.

Is there a software lock on charging aftermarket batteries? Possible snafu during replacement of parts?

Any help would be appreciated. I live in a country with no Apple stores and the cost of having someone else look at the problem is too prohibitive.

I no longer have access to the original battery, in case this requires switching out battery circuitry.

Answer this question I have this problem too

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The answer to the question, "Is there a software lock on charging aftermarket batteries?" is a qualified no. After the iPhone X, Apple started pairing batteries with phones, including the XS, XS Max, XR and later models. Which means changing the battery, whether genuine Apple or aftermarket, means you get a "non-genuine" parts warning and you lose the ability to view battery health information.

However, to the best of our knowledge, none of that prevents the battery from working correctly. It's our understanding that even with the warning and the loss of information the batteries still charge and power the phone just as they always did. So as tempting as it is to blame Apple's pairing policies, in your case I'd suggest looking for a hardware issue.

First thing to do is unplug the battery and check the motherboard connector for any bent, broken or missing pins. Normally I'd tell you to check the connector on the battery's flex cable as well, but having tried two different batteries that's not necessary since it's highly unlikely they'd both be broken in exactly the same way. Use a magnifying glass and a bright light and take a good look.

Anyway, next step is to clean everything with 90% or higher concentration of isopropyl (rubbing) alcohol.

Finally, check the components mounted on the board surrounding the battery connector; it's not unheard of for components to get knocked off in the process of trying to fit the battery plug into the socket.

As a last resort, let me check with you: were the two batteries you tried both from the same manufacturer? It's possible the particular battery you got for some reason just isn't compatible with your phone. If nothing else helps, it might be worthwhile to just go on a random AliExpress or eBay seller and pick up a different battery; heck, you could even get one from here on iFixit - at least you'd know for sure you're getting a quality battery with a guarantee.

Rereading your question, it also occurs to me that there could be an issue with the charging port you replaced; however I put that at a somewhat low probability as it wouldn't affect the wireless charging. You could try unplugging the lighting flex cable and see if the wireless charging works under those circumstances to try and rule that out as the cause.

Give some or all of those suggestions a try then come back and let us know what you find. After that we can see if we can figure out what your next step should be.

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5 Comments:

Thank you for your answer. I went over everything again, and managed to narrow down the issue to the charging port and did another charge port replacement after which everything is now working.

Here are my debugging steps for anybody else reading:

- the phone was coming on for ~2 minutes after which it would crash

- i managed to download the logs (Privacy & Security -> Analytics & Improvements -> Analytics Data -> panic-full*.ips)

- note: you only have ~2 minutes before iphone shuts down with a panic, i extracted the panic logs by airdropping to my mac

In the log there's a value for "panicString", which references "no successful checkins from thermalmonitord" and "Missing sensor(s): prs0".

After a bunch of reddit + google, it seems this refers to the barometric sensor which sits on the charging strip; so I was able to narrow this issue down to a faulty charging strip & ordered a new replacement.

This time I ordered a scavenged OEM part instead of after market part & things seem to be working.

Thank you!

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@brieflyfixed The PRS0 seems to be referring to the proximity sensor from my research which may have been damaged during the repair. First step would be to attempt to reseat the connector and maybe use some isopropyl alcohol to clean the connector just in case. If it is broken you could buy a iPhone XS Max Earpiece Speaker and Sensor Assembly and see if that resolves the issue but this WILL break Face ID since it is paired to each individual part.

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@thequacker Actually, @brieflyfixed is correct; PRS0 is the pressure sensor associated with the barometric vent on the bottom of the phone, and is located on the charging port assembly, which explains why replacing the lightning port assembly fixed the problem.

While most aftermarket charging cables do support the required sensors and usually work with no problem, as you found there are some out there who either don't, or their quality control is lax and lets bad ones slip through.

Anyway, glad to hear you're up and running again!

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@brieflyfixed By the way, you can find out all about those reboot loops, or kernel panics as they're officially called here.

iPhone Kernel Panics

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@dadibrokeit Thank you, also great resource that will defenetly go into my bookmarks. I usually browse iFixit during school and it has started back up so I should be a lot more active. I try to be on it in the summer but I just tend to not get on it because I just forget sometimes. Also probably helps that this is one of the few websites I visit in my free time that isn’t blacklisted.

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brieflyfixed will be eternally grateful.
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