iPhone 6S Battery: Poor cool weather performance

[Zeos]

Recently took my iPhone 6S as my primary shooter on a vacation. Temperatures ranged from 34 deg F to 41 deg F. Without fail, when my iPhone got to near 40% battery, the phone would shut down and show the charge indicator (the plug graphic on the screen). After the phone warmed up (or I plugged it into a small, portable power bank), the phone revived and was back up to bear 40% where it left off. Very frustrating. In normal daily office use, I am able to use my phone all the way down to 0% charge.

 

[vcof2005]

Hmmm, interesting dilemma you have. I know extreme hot temps kill my phone super fast (iPhone 5). Not too sure about the cold though.

 

[Aditya_S]

Recently took my iPhone 6S as my primary shooter on a vacation. Temperatures ranged from 34 deg F to 41 deg F. Without fail, when my iPhone got to near 40% battery, the phone would shut down and show the charge indicator (the plug graphic on the screen). After the phone warmed up (or I plugged it into a small, portable power bank), the phone revived and was back up to bear 40% where it left off. Very frustrating. In normal daily office use, I am able to use my phone all the way down to 0% charge.

The same happened to me, I put my iPhone 6s at 30% on the ground to play football at about 40 degrees Fahrenheit, and I came back to it dead until it warmed up

 

[C DM]

This isn't that uncommon (and realistically applies to li-ion batteries in general): https://support.apple.com/en-us/HT201678