How to calibrate iPhone battery?

This is a fault of the battery. It is swelking and causing the phone to shut down due to pressure on the circuit board inside.

Go to an Apple Store to discuss your options . They will often quote to replace the battery and replace the entire handset with a refurbished unit (the one I got was like new!!)

Hope this helps others out there suffering this fault.

to calibrate the battery do the following

Charge iphone fully (Do Not Use While Charging), use phone until it shuts its self off, fully charge again (Do Not Use While Charging), do a warm reboot (hold on/off & home buttons until apple logo appears).

to keep the battery in top condition it is recommended that you do a full charge cycle at least once every 6 weeks, to do a full charge cycle drain battery down to 20% or less then give phone a full charge.

Hope this is of some help.

You can ignore Platnumk's post, as you can no longer "calibrate" an iPhone battery. All you can do is "calibrate" the battery percentage icon, nothing more.

Thats the point, the battery meter has a tendacy to go out of alignment, without recalibrating the battery meter you may think your phone has 100% charge when it actually only has 40% charge, I know this from 1st hand experience.

This is a well documented and known problem since the iPhone 3GS

Talk about arguing a minor semantical point. All the user cares about is having an accurate battery percentage icon. And PlatnumK's advice will assist with that.

Apple no longer recommends anything in your original post be done anymore. Read here:

http://www.apple.com/asia/batteries/iphone.html

wjosten,

I totally agree with you on the charge cycle point, but what has happened over then last 6 months is his battery meter has gone out of alignment and not giving a true reading of how much charge is in the phone.

By running the phone down and fully charging it twice will re-calibrate the battery meter so that it will give original poster a more accurate value of how much charge is in his phone (Tho this still wont give 100% accuracy as the battery meter is only a rough indication).

Tho, some people have found that just giving the phone a warm reboot will also fix problem but this is not garenteed.

Apple may not have that recommendation on that page anymore, but it is still a supported procedure by Apple. It's remains a recommended troubleshooting step by Apple Support.

Gus stop polemizating about calibrating batt. and charging .. waste of time .. just buy new batt. for £5 quid is worth and u good to go .. very easy to replace ..

I tried this last night, and so far so good. Thanks for the info!

Hi Platnum K,

I'd like to try your method of hard resetting my phone however my sleep/power button doesn't work.

Do you know if there's a method of hard resetting the phone using assistive touch or if there's any other way of doing it?

Luke

Lekz1 wrote:

Hi

Do you know if there's a method of hard resseting the phone using assistive touch or if there's any other way of doing it?

What is "hard reset"?

ok, here you go

Lekz1 wrote:

Hi Platnum K,

I'd like to try your method of hard resetting my phone however my sleep/power button doesn't work.

Do you know if there's a method of hard resetting the phone using assistive touch or if there's any other way of doing it?

Luke

Tap the Assistive Touch button, Tap Device, Press and hold the Lock Icon

The 'Slide To Turn Off' should then appear, use it to turn the phone off, wait for a minute or so then

plug the phone into your computer or into the power adapter - the phone should then come back on.

Hope this is of some help.

Hi Luke,

There is a known issue with the iPhone 5 Sleep/Wake button and you may be able to get it fixed for free even if out of warranty.

Check the following link to see if you're eligible:

https://ssl.apple.com/uk/support/iphone5-sleepwakebutton/

Thanks,

Richard