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From: <bp@www.zefox.net>
Newsgroups: misc.phone.mobile.iphone
Subject: Re: Battery discharge when on but unconnected
Date: Thu, 7 Mar 2024 15:48:22 -0000 (UTC)
Organization: A noiseless patient Spider
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Alan Browne <bitbucket@blackhole.com> wrote:
> On 2024-03-05 21:03, bp@www.zefox.net wrote:
>> I expected one or two percent per day, but it seems quite
>> a bit faster. After two or three weeks it's ~50% and falls
>> a percent every couple of minutes when used actively.
>> 
>> The battery is about six months old, replaced by a local shop.
>> Maybe I got a dud? Is there a simple test?
> 
> Not likely this is a problem - you can check the battery state under 
> settings, Battery | Battery Heath (Actually not sure the iOS v. in the 
> iPhone 6 supports this).
> 
> Review active apps, some run more than you would think.
> 
> For example I forgot to stop a recording app [Sensor Log], (gyro, 
> accelerometers, GPS, etc.) and it brought down the battery pretty quick. 
>  Either stop it recording or kick out the app and that stops.
> 
> Otherwise, if in normal use it lasts more than a day, it's probably fine 
> (my iPhone 6 would go 2 - 3 days under my normal use; your normal use 
> may be different).

It seems to last several days at 100% and then abruptly plummet, with
no use by me.

It turns out there is a "battery health" option. It reports no "activity"
in the past five days, but two "battery usage" events, one reporting 
nearly 50%, though of what isn't clear (green, could it be charging?). 

I notice there's a "low power mode", but I thought turning on airplane
mode and turning off wifi would supercede that. Am I mistaken? 

Thanks for tipping me off about the battery health feature, I'll watch
more closely in the future.

bob prohaska