Not sure why this is but if I leave my 5s charging overnight and unplug it after 6-7 hours, its at 100% and the battery will last for quite awhile. If I charge it for 8 hours or longer, it will immediately drop from 100% to 99% once its unplugged and doesnt last as long. Like today. Was plugged in for around 9 hours. Unplugged it an hour ago, it dropped to 99% right away and now its at 89% after only 31 mins of use. Yesterday, it was still at 85% after 3 hours off the charger and 45 mins of use. WTF?
Over-charging the 5s?
- Thread starter kenknotts
- Start date
- Sort by reaction score
Any idea why battery drain occurs much faster when you leave it charging longer than 6-7 hours then?
LostSoul80
macrumors 68020
Possibly the sensor that measures the battery level needs calibration.
There is no reason what you are describing could happen, so probably it was just a coincidence. Notice how 1 time is ridiculous for any kind of conclusion.
sumsingwong
macrumors 6502a
Once it's fully charged, the charger begins trickle charging. It's shuts off. Once the battery drains a little, the charger activates again to fully charge it. You may have unplugged it, when the device was in draining phase which is why it drops down to 99% shortly after unplugging.
imaginex20
macrumors 68000
same thing happened with my iphone 5 and 5S, when this happens I would just restart the phone and it'll show 100% again. Not sure what is going on...
I see. It drops immediately to 99%, like the second its unplugged
Just got my silver 5S a few days ago, waited to activate. Had it on the charger for almost 24 hours, because I forgot I had it charging. Like others have said, once the iPhone is fully charged, it cuts off the charger and just sits idle with a full charge...so essentially you can't overcharge.
Applejuiced
macrumors Westmere
Don't be so hung up on that percentage indicator.
It might drop 1% within a second and then stay at a certain level for a while and so on.
The battery work like this:
-It takes in a lot of juice all the way up to about 90%
-At 90% it takes juice slowly until 100%
-At 100% it completely stop accepting any charge and deny any juice
-The phone uses battery slowly until 97%, but the phone still shows 100%
-The battery says "Oh I can take a little more" and charge up to 100% again
-Cycle repeats until you unplug it
No such thing as overcharging a lithium battery
-It takes in a lot of juice all the way up to about 90%
-At 90% it takes juice slowly until 100%
-At 100% it completely stop accepting any charge and deny any juice
-The phone uses battery slowly until 97%, but the phone still shows 100%
-The battery says "Oh I can take a little more" and charge up to 100% again
-Cycle repeats until you unplug it
No such thing as overcharging a lithium battery
EM2013
macrumors 68030
I didn't know that, I thought it was bad to leave your phone charging overnight. good to know.
Carlanga
macrumors 604
yes, the more it's plugged in the more the battery will last.
LithePanther
macrumors 6502
That number is an estimate anyways. Battery percentage is really complex and your indicator could say it was 100% but in reality it was only 95%. Or the opposite.
jabingla2810
macrumors 68020
Tip: Turn off the battery percentage and put the stop watch away.
If you have serious battery issues, you would know about it.
If you have serious battery issues, you would know about it.
Lucille Carter
Suspended
I think you need to stop looking at the battery percentage and just use your phone. You are driving yourself crazy.
LithePanther
macrumors 6502
I think you need to stop looking at the battery percentage and just use your phone. You are driving yourself crazy.
I used to be like that. It's liberating to not care.
Namji
macrumors 6502a
Can someone check to see when their iPhone 5S is fully charged at 100% does the charging / lightning icon is still displayed next to the battery icon?
The past two nights I charged my phone overnight ( 8+ hours ) and every morning it reads 100% and the charging icon is still displayed as if it shows that it is still charging.. On my iPhone 4 the charging display turns off once the phone has been charged at 100%.
Thanks.
The past two nights I charged my phone overnight ( 8+ hours ) and every morning it reads 100% and the charging icon is still displayed as if it shows that it is still charging.. On my iPhone 4 the charging display turns off once the phone has been charged at 100%.
Thanks.
Mine did this on my 4S during beta and final release. The indicator doesn't change. I guess they tweaked the percentage with iOS 7. Previously, it could read 100% but still be charging. Once it was completely full, the indicator changed to the plug instead of the lightening bolt. Now, once it hits 100% it's completely charged and shuts off, but the indicator doesn't change.