I've just had to replace a second battery on my iPhone 6 in under a year. The batteries were most likely damaged due to overheating. I talked to the repair person about the best way to prevent this in the future. He gave me three suggestions:
- Avoid charging your phone for more than 4 hours at a time (ie- don't charge over night).
- Remove from the case before charging or whenever it gets hot.
- Power down the phone before charging.
Based on many posts in this forum, #1 is incorrect #2 seems like quite a good idea. I might even purchase a different case that would give the phone better breathing room.
However, I am unsure about #3. Does powering down your iPhone before a charge help make the battery last? Does it do anything positive?