[anon(10366460)]

My iPhone SE recently downloaded the new IOS 11.1.2 normally I hold these off as I get worried about the impact on my phone. Since the update my phone is now dying at anywhere between 50-70%. I’ve tried resetting and when I plug in the cable the phone charges fine. I didn’t have any of these issues until the last few days.

[Just_Me_D]

Go to Settings -> General -> Reset, and then select "Reset All Settings". Hopefully, that'll fix the problem for you.