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From: Alan <nuh-uh@nope.com>
Newsgroups: misc.phone.mobile.iphone
Subject: Re: Hot iPhone 13 lost a lot of battery power within 3.5 hrs.
Date: Sat, 3 Aug 2024 18:20:56 -0700
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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?