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Last Post
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Jul 20, 2008 1:52 AM
by: Arvie
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Posts:
79
Registered:
Jul 17, 2007
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iPhone 3G Battery Life Really Short- Please Help!
Posted:
Jul 15, 2008 11:59 PM
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I got my phone yesterday and charged it for 12 hours overnight after it drained completely. I unplugged it at 11:30 this morning I used it frequently throughout the next day, and had Wifi and 3G on the whole time. I am using MobileMe so I have push email enabled, so there is no checking interval. The battery was completely drained by 8 p.m. this same day, 8 and a half hours after unplugging it. Granted I was using it a lot throughout the day, but that still seems much shorter than my original iPhone's battery life. Do I have a bad battery in need of replacement, or is this normal?
15" Mac Book Pro
Mac OS X (10.4.10)
2.16 GHZ Intel Core Duo, 2 GB RAM, 30 GB 5G iPod, 8 GB iPhone
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Posts:
421
From:
Canmore, Canada
Registered:
Oct 5, 2002
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Re: iPhone 3G Battery Life Really Short- Please Help!
Posted:
Jul 16, 2008 5:45 AM
in response to: TenaciousN8
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The current battery has less use time than the previous model of iPhone. If you, as your post seems to indicate, had Wi-Fi and 3G on the entire time from 1130hrs to 2000hrs then your battery is fine. Clarify the amount of time you had the iPhone on and in what form of use it was in during that time.
iMac 24" 2.4GHz Intel Core 2 Duo, 4GB memory, 320GB HD, iBook 12" G4, A/X
Mac OS X (10.5.4)
1TB+ Ext HD, iPod 80GB(6G), Etymotic ER•4P, Nikon cameras/glass
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Posts:
84
From:
Farnborough
Registered:
Aug 31, 2005
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Posts:
87
Registered:
Jul 20, 2005
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Re: iPhone 3G Battery Life Really Short- Please Help!
Posted:
Jul 16, 2008 6:18 AM
in response to: TenaciousN8
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That sounds about right to me. That battery life has been my experience as well. I now keep a charger at work and plug in my phone so it lasts the whole day. Of course if you are a student going from class to class this can be a bit more difficult.
2.4 Ghz 24" iMac, 2.16 Ghz MBP C2D 4GB RAM, 2.1 Ghz G5 iMac (iSight) 2.5GB RAM
Mac OS X (10.5.4)
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Posts:
48
From:
London
Registered:
Mar 6, 2008
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Re: iPhone 3G Battery Life Really Short- Please Help!
Posted:
Jul 16, 2008 6:43 AM
in response to: TenaciousN8
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over the weekend I charged mine as an when i could as I heard the battery was an issue, however i gave it a full cycle (ran it right down and charged it fully up) on Monday night, Yesterday it was off the charger from around 8am and managed to surf mostly on 3G for ~2 hours, make approx 30min of calls, download apps and songs from itunes and che3ck mail every 15 mins and play a few games etc. I had wifi, 3G, GPS and the location thing on all day and ended up having to play the same video on iplayer about 3-5 times for the battery to finally run out at around 2:30am I've now given it another full charge and i hope it's back to approx what i got from my old iPhone which let me go a full day without worrying no matter what i was up to.
give cycling it a try, doesn't seem to work for everyone but it certainly helped me.
iPhone 3G 16GB, 15" MacBook Pro 2.5GHz
Mac OS X (10.5.2)
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Posts:
3
From:
Kentucky
Registered:
Jul 14, 2008
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Re: iPhone 3G Battery Life Really Short- Please Help!
Posted:
Jul 16, 2008 7:37 AM
in response to: ginguar
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Helpful
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Cycling is one of the oldest tricks in the book. You should probably condition your battery by running at least three deep discharge to full charge cycles of the course of three days if possible. It'll make a noticable difference. If you're the type that puts the phone on a charger during the day, try to let the phone fully discharge about once a week and then recharge to full charge uninterrupted.
Iphone 3G
Other OS
Archlinux
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Posts:
79
Registered:
Jul 17, 2007
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Re: iPhone 3G Battery Life Really Short- Please Help!
Posted:
Jul 16, 2008 8:09 AM
in response to: TenaciousN8
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Thanks for the info, I fully cycled the battery again after it died yesterday, but I am overall unhappy with the battery performance. It only lasted for 8 1/2 hours yesterday, I unplugged it at 11:30am and it was dead by 8pm the same day. Does that seem unusually short to anyone?
15" Mac Book Pro
Mac OS X (10.4.10)
2.16 GHZ Intel Core Duo, 2 GB RAM, 30 GB 5G iPod, 8 GB iPhone
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Posts:
63
Registered:
Jan 18, 2008
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Re: iPhone 3G Battery Life Really Short- Please Help!
Posted:
Jul 16, 2008 8:38 AM
in response to: TenaciousN8
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Solved
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Considering the features you have enabled, and the amount (a lot) you say that you use it throughout the day, no it does not seem to drain fast. I had a similar problem but i turned of PUSH and it gave me wayyyy more battery life.
I understand that this may not be an option to you because you have mobile.me
So another quick fix: buy a charger for your car, office and maybe an extra to keep with you. (They have car chargers that can be used in a home outlet as well)
That's what i did. I also have it plugged in when im at my computer.
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Posts:
5
From:
USA
Registered:
Jul 17, 2008
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Re: iPhone 3G Battery Life Really Short- Please Help!
Posted:
Jul 17, 2008 5:39 AM
in response to: TenaciousN8
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I came to the 3g as a former Palm Treo 700p user. With that phone approximately 8 hours of use (data searches, email checking at 15 min. intervals, and approximately 2 hours of talk time) the phone was nearly completely drained. Therefore, at this point my IPhone 3g's battery life seems pretty good given all of the features I use it for.
17" MacBook Pro
Mac OS X (10.4.11)
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Posts:
77
From:
Norway
Registered:
May 18, 2005
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Re: iPhone 3G Battery Life Really Short- Please Help!
Posted:
Jul 17, 2008 5:59 AM
in response to: TenaciousN8
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I can agree that when going full steam and everything is switched on, the battery life is not much to boast about.
However, keep in mind that the phone is practically working all the time then, with pushing (mail, contacts, calendar), checking for wi-fi and everything else you might do on your phone. Then consider how long your laptop battery would last with the equal amount of "stuff" going on....
I think we tend to forget that iPhone 3G is more a computer than a phone, and with the power-need that comes with it.
That said, my advice would be to switch off "pushing". After I switched off pushing, the power consumption dropped dramatically, from "draining" to almost nothing (by comparison). And I still use it for phoning, wi-fi is switched on and so on. I charged it yesterday afternoon, which means that my phone has been in various use close to 24 hours and have only consumed about 1/3 of the battery (according to the icon). So unless you are seriously dependent on pushing (instead of downloading from time to time when opening the mailbox), I would switch it off.
All the best,
Espen
PowerMac G5 Quad 2.5 ghz, 23" Apple Display, 12" PowerBk G4, iPods, Wacom Tablet
Mac OS X (10.5.4)
MacBook Intel Core2Duo 2,4 ghz, 2 x 15" PowerBook G4, 20" iMac G5 2.1 ghz
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Posts:
18
Registered:
Jun 27, 2007
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Re: iPhone 3G Battery Life Really Short- Please Help!
Posted:
Jul 17, 2008 6:23 AM
in response to: TenaciousN8
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I have a quick question that i feels falls into this category rather than deserving it's own.
Isn't it right that with 3g turned off the new iphone should get just as good of battery life as the other iphones?
MacBook Pro
Mac OS X (10.4.10)
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Posts:
1
From:
Atlanta, Ga
Registered:
Jul 17, 2008
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Re: iPhone 3G Battery Life Really Short- Please Help!
Posted:
Jul 17, 2008 6:28 AM
in response to: Espen S.
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I agree with Espen S., this is a more a computer than a phone, i use this settings and my battery last about 40 hrs:
mostly 2G except when i surf internet i enable 3G
Wifi off
push every 30mn
i play about 1hr daily of music
i check my mail on the phone every 20 mn or 30 mn
talk time about 30mn daily ( maybe less)
i saw in settings>> general>> about>> like 6hrs and 30mn total of usage
for me the battery is good ( 40hrs) but can be better.
HP dv9100
Windows XP Pro
iPhone 3G -8GB
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Posts:
18
Registered:
Jun 27, 2007
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Re: iPhone 3G Battery Life Really Short- Please Help!
Posted:
Jul 17, 2008 6:43 AM
in response to: SSSnowbird
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also: what network does it default to after 3g is off?
MacBook Pro
Mac OS X (10.4.10)
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Posts:
77
From:
Norway
Registered:
May 18, 2005
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Re: iPhone 3G Battery Life Really Short- Please Help!
Posted:
Jul 17, 2008 9:43 AM
in response to: SSSnowbird
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SSSnowbird
My impression is that it is not 3G that drains the battery, it is the "Push" feature. Meaning it is the fact that the iPhone is active more or less continuously.
It is as "D to the M" replied to the initial poster - it is the sum of all the activities on the phone that takes power, where "Push" obviously has a certain hunger for power.
My phone uses 3G where available, and the power consumption still dropped when switching off "Push".
Regarding your question about what happens if you switch off 3G, I do not think you can switch it off. 3G describes the capacity of the mobile network your phone has connected to and is not a different network as such.
When switching off "Push", you do not switch off a network - what you switch off is the activity of pushing.
(Please correct me if I am wrong about this) 
All the best,
Espen
PowerMac G5 Quad 2.5 ghz, 23" Apple Display, 12" PowerBk G4, iPods, Wacom Tablet
Mac OS X (10.5.4)
MacBook Intel Core2Duo 2,4 ghz, 15" PowerBook G4, 20" iMac G5 2.1, iPhone 3G
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