How to calibrate iPhone battery?

Hi Ponty79,

Thank you so much for the link, I checked to see if my phone was eligible and it is!

Luke

You're welcome. Glad I could help. :-) I only knew about it because my colleague picked her repaired phone up last night.

They also have her a temporary phone whilst it was being done. She was worried about letting her battery die in case she couldn't turn it back on again!

Good luck!

Richard

hello, recently I've been having problems with my iPhone battery and i came across this thread, in hopes I could fix them. I stumbled upon this thread a couple weeks ago. My iPhone died during a power outage and I couldn't charge it until power came back which took 2-3 hours.As soon as power came back, I plugged it into the outlet. However it took 4 whole days to turn on. But my battery still continues to drain quickly. Today I tried your method to calibrate the battery, however at the last step, after soft resetting my iPhone, it brought it back to the black screen with the red battery icon. Is this natural? And is there a way to fix this without hard resetting and deleting everything off my phone?

It sounds as if its now showing the correct amount of charge, place phone back on charge and allow it to fully change (without using it) and you should then be go to go

I will let it charge overnight and see if that helps. Because I charged it for several hours and it wouldn't turn on still (black screen with empty battery icon). I hope it will turn on By morning

When you plug it in to charge do you get the lightning bolt symbol come up, if not then I would try a different USB port, if that doesn't work then try a different cable or try using a wall charger, if then it still won't charge then you could have a dead battery or a hardware fault and I would book an appointment at your nearest genius bar and have it checked

no lightning bolt, just An empty battery icon but this has never been a problem. It was like this last time and I let it charge overnight and still hasn't turned on. I wanna call my girl but her new number is on my phone smh. i should've just left it as is, yesterday when I "calibrated" the battery it was at 100% then I pressed and held sleep/power with the home button to soft reset and that 100% went to a black screen with an empty battery icon like it was dead. I should've just left it as is. I'm trying to calm down but this is ridiculous. I should've got an android.

A Friend of mine had the some problem with her iPhone 5c and we worked out that it was the charger,.

try these steps to try and resolve to problem.

1, Check the charging port of lint

2, If changing via USB on a computer then try using a mains charger

3. If charging via a mains charger then try charging from a computers USB port

4. If option 2 or 3 didn't work then try options 2 & 3 again but with a different cable

It could also be that the phone a froze, if that is the case then try doing another soft reset

If none of the above work then I suspect either a dead battery or a hardware fault.

If all else fails then book an appointment at your nearest apple retail store and take your phone, cable & charger in for testing.

If your phone is less than 3 months (1yr for uk) then the battery is covered under the warranty.

also have you checked with apple as I do know that a small number of iPhone 5's were shipped with faulty batteries

https://www.apple.com/uk/support/iphone5-battery/

I Am using an outlet charger, specifically the iPad charger because it provides more power and faster charging. Last time when it took 4 days to charge I used usb to laptop method but I figured since usb is slow compared to outlet, outlet charging would be the best solution. As for the wire, well it worked last tiime, this is really ridiculous man, thank you for giving me advice I'm starting to lose my mind over this.

There is one last thing you can try but it involves a little bit of risk,

1. Turn off phone completely

2. Connect the apple cable to phone

3. Plug the apple power brick into mains

4. Plug Apple cable into power brick

now you need to wait and see if the phone comes on and starts charging, it can take up to 10 mins before you will see anything happen.

If nothing happens after the above procedure then I would defintly take it to an apple retail store as then means there is a hardware fault.

ps. Make sure you are using the apple cable and charger and not any third party cables or chargers as many of then don't work with the latest generation of apple devices.

The only other thing I can think of is putting the phone into DFU mode and do a restore through iTunes.

Other other than that I'm out of ideas, hopefully someone else might come up with something.

Fortunately it is the apple cable and charger. Is the power brick the iPad charger? And it's still on the black screen with an empty battery icon, how do I know if it's turned off or how do I turn it off? Why is this risky?

The risk is that it may not come back on at all.

To turn off hold sleep/wake button until the Slide To Turn Off appears And slide the red dot from left to right.

NNo it won't do that. I'm saying it's the black screen with a battery icon in th middle with a red bar in it. no matter how long I hold the power/sleep button it stays on that screen. It'll turn on it just takes forever

BobFromObeseTown wrote:

NNo it won't do that. I'm saying it's the black screen with a battery icon in th middle with a red bar in it. no matter how long I hold the power/sleep button it stays on that screen. It'll turn on it just takes forever

Plug it in & hold both the Power & Home button until you see the Apple logo.

HHappen the same calibrate like planktun told.