IPhone 7 plus battery drains at midnight to 1%

Giulio,

i get your point, but, i have had a previous iphone 5 in same setup for many years and never an issue, yet setting an iphone 7 as an ipod by removing / disabling everything should not see with zero activiy as the graph shows a drop from 80% to 1% then with a reset for battery calibration a jump back from a shwon 8% to 83% that cannot be temp etc as it has no effect on the iphone 5.

I’m going to leave in my office tonight to see if the issue remains, if so it wont be weather.

plus lots of people leave ipods or iphones in rheir cars as music players, ive always done this.

my other thought is to connect via a power bank, i have a small griffin brand new powerbank.

thanks, Rob

Giulio,

Phone charges normally to 100%, then with zero activity sits at 100% to around 00:00 hours, then drops to 1%.

Assuming at 1% phone was connected to power, phone starts to charge normally, today at 8% i remembered to reset battery calibration at which point phone showed not 8% having charged from 1% but 83% then continued to charge normally with a normal length of time to 100%, the phone is currently since this morning being some 5 hours sat at 100% still.

This scenario occurs each evening hence the screen shot of the chrge state it shows 100% to a sudden drop to 1% to 8% to an immediate jump to 83% left hand and right sides of the graph.

Others have reported similar scenarios, i a, trying to be very specific in description but please look very carefully at the graph...

regards,

Rob

Giulio,

Thank you so much, i’m going to make two tests, (1) cool phone at 100% battery carge in freezer protected from moisture to rule out temperature. (2) I also have a perfectly working iphone 6s (work phone) tonight i will place both in the car, the iphone 6 to the cars usb and the iphone 7 alone but in the same location, theoretically if car issue iphone 6 will drain, if cold both will drain, if iphone 7 only it must be the phone alone. I dont think my cars centre console gets cold enough to cause rhe issue, but todays freezer test will...

My suspicion is it is the phone, by placing both side by side tonight it will give a clear comparison.

If others you know have come across this i’d love to hear back.

I’m nervous of repair as by the time ive paid out i might as well get a new ipod (since my iphone is 128gb) but thats £299 so would prefer to try and resolve... i simply want to use this 22 month old iphone as an ipod, up until a month ago when i bought an iphone xs max, this phone was fine.

regards,

rob.

Giulio,

Thank you so much, i’m going to make two tests, (1) cool phone at 100% battery carge in freezer protected from moisture to rule out temperature. (2) I also have a perfectly working iphone 6s (work phone) tonight i will place both in the car, the iphone 6 to the cars usb and the iphone 7 alone but in the same location, theoretically if car issue iphone 6 will drain, if cold both will drain, if iphone 7 only it must be the phone alone. I dont think my cars centre console gets cold enough to cause rhe issue, but todays freezer test will...

My suspicion is it is the phone, by placing both side by side tonight it will give a clear comparison.

If others you know have come across this i’d love to hear back.

I’m nervous of repair as by the time ive paid out i might as well get a new ipod (since my iphone is 128gb) but thats £299 so would prefer to try and resolve... i simply want to use this 22 month old iphone as an ipod, up until a month ago when i bought an iphone xs max, this phone was fine.

regards,

rob.

Giulio,

Solved. Temperature.

Placed in freezer for 22 mins, phone screen temp at -11 deg C, internal charge port at +10 deg C, battery was at 100% 22 mins later 1%. Now plugged into mains charger, immediately changes from 1% to 84%. Done battery re-calibration at 84% phone then on restart seconds later shows 99% which for about 25 mins effort 1% drop from start position of 100% to 99% would seem normal.

regards,

Rob.

86% normal peak performance