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Wasn't that the case in iOS 8 as well? Or are there additional performance gains not available to devices without Metal>

On the iOS 9 preview page, Apple only mentions performance improvements because of Metal. They don't mention improvements to performance by other means.

I imagine there will be other improvements but, as they go unmentioned, it isn't certain.
 
Are developers able to detect when Low Power Mode is on and perhaps suggest to users that they should turn it off when the app in question is CPU intensive? Mostly just thinking high end games might want to say "BTW, low power mode is on so performance is going to be impaired."

Low Power Mode was a nice olive branch in iOS 9 beta 1, AKA, the murderer of iOS batteries. It would consume 1% every 6 minutes on my 6+ (dead in 10 hours) - low power mode brought it down to 1% per 10 minutes (dead in 15 hours).

With beta 2, my battery life is back to the normal 20 minutes per 1% (dead in 30 hours, theoretically - never actually have had it drop under 20%.)
 
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I wouldn't say 'love it', but it's alright. However, it can't typically compete with the battery life of flagship Android devices. I give credit to Apple when it comes to optimising their energy usage, seeing what they can achieve even with a relatively small battery.
Pretty sure for the same size battery iOS always wins out. The 6+ lasts me all day easily and would into the next if I didn't charge it every night and would last 3-4 days if in standby. iOS is optimized on every Apple device so it should be more efficient.
Source (first hit on a Google search)
 
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I thought they said they dropped performance a bit but many people here on the forums said they didn't notice any difference.

No amount of battery life can make up for my precious performance so I won't be using this mode lol.
 
I like the concept but the yellow battery color has to change. One comment I got was "the battery icon is urine yellow."
They need to be drinking more water if their urine is that yellow.

On a related note, I wanted it to turn red below 20% for the longest time. Im glad that happened. that way you don't need the percentage to show as the color indicates battery status.
 
The next iPhone will be even faster. The current iPhone is already fast enough for a phone. It just needs more RAM to keep things loaded. So on the 6S I might just run it in low power mode all the time. Hopefully they will let us still receive mail with some settings adjustments. I don't mind if things are throttled but still need messages and stuff to come in. I'd love battery life similar to my 6 Plus in the smaller 6S.
 



With iOS 9, Apple introduced a Low Power mode, designed to extend battery life when an iPhone's power is running low. According to the feature's description, Low Power mode works by reducing an iPhone's performance and cutting down on background activity.......

Who cares. I quit applications when finished and leave Bluetooth and WiFi off when not required. I don't leave everything turn on when not required. It's common sense. People are getting too lazy.
 
Would it be feasible to run in semi-permanent low power mode?

It depends. To my knowledge, low-power mode:
  • Disables automatic fetching of mails (not sure about push), i.e. you need to open Mail the get mail updates
  • Disables background app refresh and background downloads (perhaps some other background activity too)
  • Disables many animations and animated wallpapers
  • Lowers the screen brightness
  • Limits networking speed (maybe other things too, like GPS-fixing frequency)
Now it also seems to throttle the processor. It depends on whether you can use your iPhone without those features on a frequent basis. I think it's good that Apple offers a toggle to disable many energy-consuming features quickly without having to dig into or even know about those features.

Who cares. I quit applications when finished and leave Bluetooth and WiFi off when not required. I don't leave everything turn on when not required. It's common sense. People are getting too lazy.

I found that disabling Wi-Fi and Bluetooth rarely has an impact on battery life, at least in my case. The biggest battery drain is the screen itself as well as foreground activity. The iPhone has a fantastic battery life when you only frequently use your phone to check and respond to messages, rather than keeping it on for prolonged periods of time. It can easily last two days or more that way. I know of many phones that are extremely leaky when it comes to standby battery usage.
 
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Who cares. I quit applications when finished and leave Bluetooth and WiFi off when not required. I don't leave everything turn on when not required. It's common sense. People are getting too lazy.

From what I've read, LP Mode does more than what you're suggesting, including some things that you can't do as an iPhone user. I think that this is a welcome addition to iOS.
 
Maybe I want it to die quickly to calibrate the battery (supposedly, anyway). And a yellow battery is meaningless if your phone's in grayscale, no?
 
Reducing power consumption and reducing processor work is great news. It would be wonderful to be able to adjust this on the fly, to choose low power mode so that one can have longer battery life. Not just on the iPhone but all devices. We've had that in varying degrees on the Mac for a long time.

You can. From the article:-

It can also be turned on via the new Battery section of the Settings app.
 
calculator doesn't really need to be in the Control Center any longer since spotlight/search can make calculations now.

I can't be the only one who uses the calculator in scientific mode...
... or who wants the + key on the same screen as the digit keys.
 
I love this mode but it needs a toggle in the Control Center.

Conversely, calculator doesn't really need to be in the Control Center any longer since spotlight/search can make calculations now.

Yeah, a Control Center toggle would be great, but in the meantime, you can add a launcher using the appropriate URL scheme. While it's not an instant, direct control, I suppose it's better than nothing.
 
It depends. To my knowledge, low-power mode:
  • Disables automatic fetching of mails (not sure about push), i.e. you need to open Mail the get mail updates
  • Disables background app refresh and background downloads (perhaps some other background activity too)
  • Disables many animations and animated wallpapers
  • Lowers the screen brightness
  • Limits networking speed (maybe other things too, like GPS-fixing frequency)
Now it also seems to throttle the processor. It depends on whether you can use your iPhone without those features on a frequent basis. I think it's good that Apple offers a toggle to disable many energy-consuming features quickly without having to dig into or even know about those features.



I found that disabling Wi-Fi and Bluetooth rarely has an impact on battery life, at least in my case. The biggest battery drain is the screen itself as well as foreground activity. The iPhone has a fantastic battery life when you only frequently use your phone to check and respond to messages, rather than keeping it on for prolonged periods of time. It can easily last two days or more that way. I know of many phones that are extremely leaky when it comes to standby battery usage.

Welcome to 2010 its crazy how ios did not have this earlier
 
I just wish it didn't do anything to mail. I would turn it on for good on my dads phone if it wasn't for that. For a person that mostly uses the phone to use the actual phone app, and gets business emails, it would be the best option.
 
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I wonder if they could create power "profiles" - so maybe at certain times it checks email and messages every 5 min but at other times it might be checked only once an hour (or, as suggested above, put everything into low power mode except continue to check email).

If things could be adjusted at a more granular level, it's possible that some could squeeze out even more battery life (ideally, they could get the new Proactive system to help with the adjustment to minimize the risk of someone having email polled every seven seconds and killing the battery in an hour...)
 
if we're on control center limitations, for god's sake - let us select a dropdown of BT devices when we want to launch BT. what's the point otherwise? i mean if you only have one device and one BT accessory, sure...

A lot more could be done with control center, that's for sure. How about letting us access the wifi menu with a long press of the wifi signal, for starters. That way I don't have to go into settings just to pick another access point.
 
I love this mode but it needs a toggle in the Control Center.

Conversely, calculator doesn't really need to be in the Control Center any longer since spotlight/search can make calculations now.
And the most ironic part is: what we often use a calculator is to do simple calculation such as 22-32.
However, similar to other icons in control centre, I don't seriously need low power mode on really handy. If you need it, you may realise you need to save power, and then go settings to turn it on.
The meaning those icons exist is to trigger most commonly used apps, or functions such a s flash light, which there is no integrated app could start a flash light, except camera, maybe.
Hoping Low power mode could be triggered handy is just like hoping cellular data could be triggered handy.
All right, I find myself losing where i am. :(
 
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