Iphone 6 Plus recharge reboot loop

MacAddict!* wrote:

This evening while outside working in below 0 temps, my iphone died.

According to Apple, this condition is temporary.

If you get desperate, a DFU restore will usually recover the phone but you WILL lose all your data:

• Install the latest version of iTunes on your computer if it isn't there already ( (you must have Windows 7 or later or OS X 10.8.5 or later)
• Reboot your computer
• Disable any antivirus and firewalls
• Launch iTunes
• Connect the device cable to a USB port on the computer (not to a USB hub), but DO NOT CONNECT TO THE DEVICE YET
• Press and hold the HOME and SLEEP buttons at the same time for exactly 10 seconds, until the screen turns black, then release the SLEEP button but continue holding the HOME button. If an Apple logo appears while holding both buttons you held for too long; start over.
• While still holding the HOME button connect the other end of the cable to the device
• You should see a message in iTunes saying a phone in Recovery mode has been detected (it may take up to a minute for the message to appear). When you see that message release the HOME button and the device should restore. When asked DO NOT restore a backup; set up as a new phone.

Try several times if it doesn't work the first time; getting it into DFU mode is tricky.

I have been seeing this problem a lot across a variety of different iDevices.

An inexpensive usb ammeter will help you tremendously to troubleshoot this issue. What I'm seeing is a failure of the current sensing or charging handoff between a phone that is not on, and a phone that is on. While off, the phone will charge just fine, and pull the normal 1amp or so. It will inappropriately turn on when the battery is still far too depleted to support booting the phone. I do not yet know why it does this.

Normally, a phone will be able to charge while on, however in the case of these devices, they stop charging when on. I don't know if this is a hardware defect of the Power Management chip, or a software problem, or just a general failure of the current sensing system

So the problem is kind of like falling into a hole. You can try to climb out, but just at the top, you fall back down again.

What I've been doing is using a 'trick'. The phone will charge normally when off, AND the phone will still pull normal charging current WHEN IN RECOVERY MODE. So to 'get over the hump' you could try putting your phone in recovery mode and allowing it to charge for a long time. (with the connect to iTunes symbol showing). A usb ammeter will confirm that the phone is actually pulling charging current while you do this, but it is not required. After some time, press top power and home for 10 seconds to reboot the phone. If the battery was able to charge sufficiently, the phone will be back in the normal range---i.e. it will no longer be trying to boot off a too low battery. Once over the hump, the phone will likely be able to charge and discharge normally. I do not know if the situation repeats itself if the battery is allowed to become seriously low again.

Give this a try, and let us know how it works out!
Jessa

The problem could have been aggravated by some components remaining cold for an extremely long time. Don't forget that you were way below the minimum.

In any event, glad that things are OK now.