iphone 7
I have 2 IPhone 7's that I just purchased not 6 months ago. The one does not hold a charge for very long and drains quickly even when not in use. The other barely holds a charge for 8 hours and thus morning I plugged it in last night and it didn't charge at all.
On the second one, I unplugged and plugged in several times, checked the plug, checked the wall outlet, finally reso to turning it on and off four times. By the forth time it seems to be charging at the moment.
To to save battery life I've stopped adding apps and turned off a few more, kind of a waste off 128g though.
(2) IPhone 7's 128g
IOS 11.2.6
I rely on my phone in my job.