Battery life

[C DM]

I didn't benchmark both modes to provide you 100% accurate results. All I'm stating is it's not worth it to run the phone in LPM all day long unless you're going on a 2 day camping trip with no power near by to recharge your phone.

It's irritating to me when Apple engineers spend all this time to gauge battery life with every feature on the phone turned on and the first thing a user does is disable almost everything.

It's like buying a new car and removing the Air conditioner, heater and the door linings just to reduce weight to get better gas mileage out of it.

The worth is really determined for each person differently. If someone isn't using much of what LPM disables to begin with and the CPU throttling isn't felt because most of the tasks are of low performance where higher CPU wouldn't really make much of a noticeable difference anyway, then the only noticeable difference would be somewhat less battery life if LPM isn't turned on, or more battery life if it's on.

 

[Armen]

The worth is really determined for each person differently. If someone isn't using much of what LPM disables to begin with and the CPU throttling isn't felt because most of the tasks are of low performance where higher CPU wouldn't really make much of a noticeable difference anyway, then the only noticeable difference would be somewhat less battery life if LPM isn't turned on, or more battery life if it's on.

We live in a society where there are charging locations all over the place. I really don't see why anyone would want to run their phone in "desperation" mode all day.

 

[C DM]

We live in a society where there are charging locations all over the place. I really don't see why anyone would want to run their phone in "desperation" mode all day.

That's the thing, for different people that mode wouldn't be "desperation" mode or anything close to it--it could be pretty much the same as it is without it, except you get more battery life.

 

[Armen]

That's the thing, for different people that mode wouldn't be "deportation" mode or anything close to it--it could be pretty much the same as it is without it, except you get more battery life.

I guess so.

 

[sbailey4]

Here you go.

As you can see. Nowhere near 5 hours with only 6% left. I've screenshot the apps I used too and you'll see that none of them are particularly battery-draining apps like YouTube or Netflix.

Yeah doesn't seem like you are really on track. Here is a nice formula that shows approx. where you should be and where you are:

iPhone 5s Spec
stdby: 240 hrs
Talk: 10hrs
Internet: 10hrs LTE/10hrs wifi (avg)
Video: 10hrs
Audio: 40hrs

Your use:
stdby 32 h 46 min
use: 4 hr 3 min
percent remaining 6%

32.75/240=.136 (14%) used for stby, 4/10 lte/wifi= .40 (40%) used 100%-(14+40)= 46% should be remaining. You are at 6% so yeah not exactly where you should be. Seems this would correspond with what you said you would typically be before iOS9.
Of course this is a sample assuming your use was wifi/lte/cellular (all 10 hrs in spec). Any music listening would need to have that number factored in. If I were you I would run the "reset all settings" option and see if that would help. That has been known to solve battery and other issues in the past after iOS updates. Easy enough to do.

 

[Scott M]

Yeah doesn't seem like you are really on track. Here is a nice formula that shows approx. where you should be and where you are:

iPhone 5s Spec
stdby: 240 hrs
Talk: 10hrs
Internet: 10hrs LTE/10hrs wifi (avg)
Video: 10hrs
Audio: 40hrs

Your use:
stdby 32 h 46 min
use: 4 hr 3 min
percent remaining 6%

32.75/240=.136 (14%) used for stby, 4/10 lte/wifi= .40 (40%) used 100%-(14+40)= 46% should be remaining. You are at 6% so yeah not exactly where you should be. Seems this would correspond with what you said you would typically be before iOS9.
Of course this is a sample assuming your use was wifi/lte/cellular (all 10 hrs in spec). Any music listening would need to have that number factored in. If I were you I would run the "reset all settings" option and see if that would help. That has been known to solve battery and other issues in the past after iOS updates. Easy enough to do.

I've tried the reset all settings thing already a couple of days ago. It didn't change anything.

 

[sbailey4]

I've tried the reset all settings thing already a couple of days ago. It didn't change anything.

Looks like you can still downgrade back to 8.4.1. May be worth trying to see if it is in fact iOS causing it. Typically its an app or settings that cause these things not iOS itself. 9 does have several more things going on though. Definitely worth trying while you can. You can always upgrade to iOS 9 whenever you want later. ( or not)