Q: iPhone 6 battery suddenly draining fast
Recently my iPhone 6 has had a few battery issues, draining rapidly at random without nothing running in the background. This morning it went from 85% charged to 22% within minutes, so needing to use the phone today I plugged it in to charge and when I did it instantly jumped to 70% there wasn't time to get it to 100% before it went out so I unplugged it and an hour later it's down to 28%. Some days it'll hold charge without any problems other days it can drop to nothing (yesterday when it dropped to 1% (when it had been at around 35% previously) I turned the phone off, a few minutes later I turned the phone on again and it was at 34%.
I only noticed this since it went to ios10.
iPhone 6, iOS 10.3.3