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iPhone 6s stays at 1% won't charge batterycondition: service

Hello there, I have a problem with my iPhone 6s.

I've replaced the battery and now it won't charge and stays at 1% also if you look at the batterycondition it says “service" instead of 100%.It also crashes and reboots about every 3 minutes. I've put the old battery back in the phone and it worked fine again, so I thought the new battery was defective. Then I bought an original apple battery but that has the same issues as the other battery I have. The iPhone only works with the old (cheap fake) battery. Does anyone know what I could do to fix this? I've tried to calibrate the battery, restore the phone, let it run out of battery and left it charging for 2 days but nothing works.

Can anyone help me?

With kind regards,

Jko

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As crazy as it sounds, if the previous battery works properly, then you probably have an issue with the replacement batteries. Where did you get them? There are a lot of bad batteries out there and if you got both from the same vendor, you may have tapped into a bad batch.

Here are some general guidelines I offer for battery troubleshooting:

When troubleshooting charging issues, I would do the following (in order):

  1. Always try another Lightning cable and charger, preferably Apple original or MFi certified units.
  2. The Lightning cable 8-pin connector should be sitting flush with the housing and completely inserted. If it is not, there could be lint/dust/debris inside the port impeding a proper connection. You can clean it out with fine point tweezers or a dental pick. Just be careful not to damage the pins inside the Lightning Port.
  3. Change the battery. The battery is the weakest link in the entire phone and certainly for charger related issues. It is also the easiest thing to replace. Use a battery utility, such as coconutBattery (for Mac) or 3uTools (for Windows) to test the battery prior to removal. Anything less than 70% of design capacity will require replacement.
  4. If the battery is in good condition, you can use a USB Ammeter to determine if the phone is really drawing current when it says it's charging. If it isn't drawing current, then I would change the Lightning/Charge Port.
  5. If a new battery and charge port still don't resolve the issue, then you either have faulty replacement parts (possible) or a logic board issue. There is an IC (commonly referred to as Tristar) responsible for communicating with the charging device and uncertified chargers can damage it. Unplug the battery and connect a known-good (preferably Apple original or MFi) charger to the phone. A properly working phone will show an Apple logo and boot loop. If the Tristar IC is bad then the phone will not do anything.

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Thank you for your reply,

The new batteries are from different vendors, 1 is a not original a+ battery and the other one is an original apple battery. The old battery is also a not original battery. I have tried different lighting cables but that did not work unfortunately. The dock connector is clean and is charging 3.76 volts into the battery, I don't know how much it would be normally but it charges the old battery with no problems. When I disconnect the battery and plug the phone in it goes into bootloop, so I think the tristar ic is ok. I also downgraded from iOS 12.1.2 to 12.1.1 but unfortunately that didnt help either.

I'm now going to try to charge the battery in another iPhone 6s, so I can see if that phone gets the same issues as this phone.

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I had this same issue - iPhone 6s would charge to (when I managed to switch it on!) 1% then stop there, eventually switching off. It at times got to 3% but simply picking it up drained the battery and it switched itself off resorting to showing the battery with one bar if I pressed any key. Leaving it on charge for a while, it’d eventually boot up (that white Apple screen) with 1% charge and the cycle would begin again!

After failing to get an Apple engineer to have a look at it (busy times for them with the 11), I decided to google and came across this thread. I dutifully got out a small brush that came with my shaver and poked it about inside the lightning port. I did not see any fluff pop out but I kept at it for a few minutes, occasionally letting a blast of air from my mouth while brushing away. I then put the cable back in and to my surprise the phone immediately showed the charging battery. A few minutes later it began the boot cycle and on loading was at 3%. It prompted me with the low battery message and (for the first time ever!) I selected the Low Power mode. Half an hour later I checked on the phone and it was at 23% charge (now 30%)!.

To think, may have been just some invisible fluff …. and I nearly got a new phone had the Apple store not been so busy!

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