Re: Hot iPhone 13 lost a lot of battery power within 3.5 hrs.

On 2024-08-03 16:47, Ant wrote:

Jolly Roger <jollyroger@pobox.com> wrote:
 

Weird/Odd. Hot iPhone 13's iOS v17.6 (updated from iOS v17.5.1
yesterday) battery power percentage dived from recharged 88% to
23% from 6 PM to 9:30 PM while out to eat dinner in a crowded
restaurant and commute to there and back home. Battery
statistics said it was hot to recharge at 88% max. Usage shows
"Find My" and weak cellular using half in the background for the
first hour, but after that was just "Find My".  Battery health
shows 89% which is normal for this iPhone from 2/1/2022.  What's
going on? Is this a new bug or something? :/

 

Higher than normal battery drain is expected with a new version
of ios as the caches and indexes get refreshed.

 

Give it a day or so to settle down.

 
Is it supposed to run even when on battery only when not at home?
It would had been nice if it happened when connected to a power
charger at home. :(

 
It's normally not an issue and runs in the background. Occasionally
it drains more than normal for whatever reason. You seem to have
hit one of those occasions.
 
Actually, you also mentioned weak cellular signal which is very
effective at draining battery power.

 

Absolutely. When the cellular (or WiFi) signal is low, the device
boosts the radio power which naturally drains the battery faster.
Combine that with the normal post-installation indexing and cache
rebuilds, and you have a recipe for abnormally-high battery drain.

 
I wished there was a way to tell iOS not to the indexes and rebuilds.

 

Not really, because you definitely want all of the benefits it provides.
It's been a normal part of system updates for decades. Refrain from
updating when you want peak performance. Simple.

 

I know using airplane mode for disabling cellular would work, but it
was in the purse so...

 

So, you couldn't take it out and turn cellular off? Not sure I follow
your logic.

 
I didn't know it was overheating and draininage battery in it until after
getting home.

 
Are you seriously suggesting you've never seen one of the numerous times
it's been mentioned that immediately after an iOS update there can be a
surge in activity?