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KingMo

macrumors member
Original poster
May 27, 2010
86
0
Hey guys. I charged my battery right before I went to bed last night. and unplugged it when it reached 100%. I then closed all apps and just left the phone alone and went to bed. When I woke up, it was at 95%. Is this normal?...and how can I conserve more battery life?
 
Hey guys. I charged my battery right before I went to bed last night. and unplugged it when it reached 100%. I then closed all apps and just left the phone alone and went to bed. When I woke up, it was at 95%. Is this normal?...and how can I conserve more battery life?


Yes it's normal, and compared with my old Blackberry's battery drain overnight, it's remarkably good.

Your phone is still in standby, and could be fetching (or receiving pushed) email overnight.

You can shut it down completely overnight by holding down the sleep/wake button until the red "Slide to Power Off" slider appears.
 
Hey guys. I charged my battery right before I went to bed last night. and unplugged it when it reached 100%. I then closed all apps and just left the phone alone and went to bed. When I woke up, it was at 95%. Is this normal?...and how can I conserve more battery life?

Leave it plugged in at night.
 
That si what I say, just plug it in before you go to bed and unplug it in the am and be happy. It is not going to over charge.
 
I think the only way to reduce battery consumption when the phone is locked is to disable any connections that you're not using. 3G, wi-fi and Bluetooth all use extra power, even if they're not actually transferring data.

I'd also say that there's no need to close all of your apps when you're not using them. As long as they're not doing something active in the background (e.g. playing music), they shouldn't consume any power. The big thing about the iOS multi-tasking is that background apps don't consume extra power; they enter a sort of frozen mode from which they can quickly resume later.

I only ever close apps if they're having problems. The Facebook app, for example, regularly has bugs for me, so whenever it does I close it from the multi-tasking pop-up bar.
 
What's "overnight?" Is it 8 hours?

If so then you burned 0.625% per hour. At that rate the phone would stay on for 160 hours which works out to 6.6 days.

Now, it's true Apple advertises 300 hours of standby, but that's under ideal conditions where bascially nothing happens. However you slice it, I wouldn't be upset with 6 (extrapolated) days of standby time.
 
That's normal. Usually I get anywhere from 95 to 98 percent left overnight.
 
What's "overnight?" Is it 8 hours?

If so then you burned 0.625% per hour. At that rate the phone would stay on for 160 hours which works out to 6.6 days.

Now, it's true Apple advertises 300 hours of standby, but that's under ideal conditions where bascially nothing happens. However you slice it, I wouldn't be upset with 6 (extrapolated) days of standby time.

300 hours standby time with 3G off, call forwarding on, push off, bluetooth off, great signal strength... http://www.apple.com/iphone/battery.html
 
I normally charge my 3GS before bed then use it for about 30 mins on wi-fi before going to sleep.

Usually wake up at like 95%+...
 
Seriously? "Oh no, I lost 5% battery charge, what to do?! Quick, to the MR forums!"
 
I used to lose ~2% overnight if I didn't use it and now I lose about 10% overnight.

One interesting thing I note that when I use the iphone 4, to go from 100% to 99% requires about 5 minutes of constant usage, but after that, going down another 1% takes only about 30-60 seconds. That first 1% is somehow different than the latter 99%.
 
Ok...thanks for the feedback everybody. Now I know there's nothing to worry about.
 
People should just charge their phone overnight and stop QQing about battery. Its AMAZING not having the battery percentage show 100% of the time.
 
Btw, turn off automatic time update...

Firstly, it is normally wrong, and secondly it stops it checking the time, thus using battery slowly (I dunno how frequent it is) which helps hold battery % in standby
 
I used to lose ~2% overnight if I didn't use it and now I lose about 10% overnight.

One interesting thing I note that when I use the iphone 4, to go from 100% to 99% requires about 5 minutes of constant usage, but after that, going down another 1% takes only about 30-60 seconds. That first 1% is somehow different than the latter 99%.

I think this is pretty standard with most electronic devices. That last percent takes forever to charge and quite a bit longer (than the rest of them) to discharge.
 
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