8 Replies Latest reply: Jun 20, 2015 9:55 AM by 7sk_city
AdrianoSM Level 1 (0 points)

Hi, I took my iphone 4s to the genius bar at apple store today. Despite having terrible battery problems they told me to wait for ios 5.1 and to calibrate my iphone battery, I was also told that replacing the phone would not be a solution as it is a software based issue.


So I have been browsing the web on how to calibrate an iphone 4s battery and have found answers but they all seem different. Answers I discovered were:



  • We must let the iPhone runs the entire burden of the battery, i.e. use it until it shuts down for lack of battery.
  • After the iPhone battery has run out, we let it sit for about 6 to 8 hours.
  • After this time because we can connect it to boot to load, this process should be left between 6 to 8 hours. (While it may use its load without disconnecting from the mains.)
  • Once the load, you can enjoy your iPhone newly calibrated.




"First, plug your device into a charger and let it charge fully – leave it charging for another hour or two after its fully charged. Then, remove from the charging source and use your device like normal. Do not plug it into a charging source, but use it until the device decides to power itself off due to low battery. When that happens, plug in your device into a charging source and let it charge fully. During this time, it is completely safe to use your device."

Im still not sure how to calibrate an iphone battery.


Can anyone please tell me the correct method?

iPhone 4S, iOS 5.0.1, (9A406)