I've noticed this as well. I left it alone for about 30 mins yesterday night with WIFI turned on and connected. When I cam back it was warm underneath. I've also notice the battery drains faster with WIFI on.
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I've noticed this as well. I left it alone for about 30 mins yesterday night with WIFI turned on and connected. When I cam back it was warm underneath. I've also notice the battery drains faster with WIFI on.
Thanks for the info. I am at about 40-50% battery life with 3 hours of usage. Like I said, I have a feeling that me using wifi to browse all day really is the culprit. Its the only time my phone even remotely get warm, not even when its charging does it really get warm. So I dont know yet whether I will be taking it to apple tomorrow.
iPhone warmth is DIRECTLY proportional to battery consumption when not plugged in to power. In other words, if the iPhone is warm, it is that activity that made it warm that is sucking life (usage time) out of your battery the most. It takes power to generate heat.
Tonight I am going to power the iPhone off to make sure charging is maximized, and to limit the standby time. (Push and hold the top button for four seconds, then slide the prompt).
Tonight I am going to power the iPhone off to make sure charging is maximized, and to limit the standby time. (Push and hold the top button for four seconds, then slide the prompt).
Yea that is what I figured. Is that normal for everone with high usage times? Is it getting warm on wifi for anyone else because once again my battery is slowly but surely dieing with less than stellar times. Tomorrow I am going all day with wifi off as my next exeperiment and take it to apple on Friday if need be.
ive discovered that surfing safari, especially on edge, drains the battery fairly quucjly. Listening to the ipod and naking calls barely effects it. I listened to music for 4 hours ir so and made a few calls and has about 80% or so left. Then i began surfing the internet tonight, and my battery dropped considerably.
Cutting off Wifi has helped my battery life a good deal.
Basically, if you have Wifi on, every time you attempt to access the internet, it burns energy searching for an access point rather than resorting to edge.
so if you had wifi enabled, and had your mail set to check every 15 minutes, and you were using Edge, it is probably searching for an access point each time before it goes out to your mail server.
I would think looking for access points could burn a fair amount of power, especially if it happens each time you use an internet feature.
Basically, if you have Wifi on, every time you attempt to access the internet, it burns energy searching for an access point rather than resorting to edge.
so if you had wifi enabled, and had your mail set to check every 15 minutes, and you were using Edge, it is probably searching for an access point each time before it goes out to your mail server.
I would think looking for access points could burn a fair amount of power, especially if it happens each time you use an internet feature.
Just wondering if your phones get quite warm while browsing via wifi....... right now I have 3:55 usage and about 30% battery life left I guess all of this is not bad just want to make sure I have a product working at full potential 
I am having the same issue... Except my phone seems to charge 90% of the green battery Icon and never go further. My usage thing also indicates that it has never been fully charged.
I picked up the phone on friday... Im going to leave it charging for the next 15 hours. If it doesn't fully charge by then, I'm bringing it back to the store monday morning.
In case this is new to some.... USB does NOT charge when the computer is in sleep. We finally charged ours using the charger and it was much better.
Charging time
I, like some others here, am concerned that I am having to charge my phone every 8 hours at least.
More disconcerting to me is that it is taking over 5 hours to get a full charge on my phone. What sort of re-charge times are others seeing on their phones.
The first full charge started at 7pm and finished at 2:30am. The next time started at 9pm and finished at 3am.
These times are with the phone connected to the supplied wall charger and the in sleep mode (black screen but can accept incoming calls).
Basically my phone is needing to spend half of its life on the charger!
On a potentially related note my WiFi reception is flakey, at random times the signal will significantly degrade or drop out all together. Right now I'm literally 10 feet away from my base station in plain line of sight and I only have one WiFi bar.
I, like some others here, am concerned that I am having to charge my phone every 8 hours at least.
More disconcerting to me is that it is taking over 5 hours to get a full charge on my phone. What sort of re-charge times are others seeing on their phones.
The first full charge started at 7pm and finished at 2:30am. The next time started at 9pm and finished at 3am.
These times are with the phone connected to the supplied wall charger and the in sleep mode (black screen but can accept incoming calls).
Basically my phone is needing to spend half of its life on the charger!
On a potentially related note my WiFi reception is flakey, at random times the signal will significantly degrade or drop out all together. Right now I'm literally 10 feet away from my base station in plain line of sight and I only have one WiFi bar.
so today after reading all these posts i'm getting something similar to you i received a 20% warning just now (3:20pm) and i used the phone similar to you.
i started using the phone's ipod feature since 7am
usage = 6h 54m
standby = 8 hrs, 30 min
i have been using the ipod nonstop and rating music constantly on the menu, i've done some light browsing a few texts too and a 2 min phone call.
hope this helps
EDIT: i got a 5% warning at about 4:55pm
and it died at 5:07pm
final when it shut off
usage =8 h 48m
standby = 10 h 27min
hello all.
I just wanted to compare my usage with all of you to see if it is the case to go to the apple store tomorrow.
I got full charge at 10 am this morning.
Played music for about an hour
played videos for about 30 minutes
a couple of demos for friends
43 minutes of phone usage
The rest mostly msging and browsing on wireless.
total usage :5 h 15 minutes
total stby: 13 hours
And it seems I just hit 20% battery.
Is this good,average or plain bad?
Thanks in advance for the help....and sorry if I am obsessing over nothing!
A>
I just wanted to compare my usage with all of you to see if it is the case to go to the apple store tomorrow.
I got full charge at 10 am this morning.
Played music for about an hour
played videos for about 30 minutes
a couple of demos for friends
43 minutes of phone usage
The rest mostly msging and browsing on wireless.
total usage :5 h 15 minutes
total stby: 13 hours
And it seems I just hit 20% battery.
Is this good,average or plain bad?
Thanks in advance for the help....and sorry if I am obsessing over nothing!
A>
You are tripping. 5 hours of usage is very good. I don't think I've ever hit 5 hours without killing my battery.
These things need to be charged every day if you are going to use them a lot (talk, use internet, etc). The tiny battery has to power a bright ass screen and a pretty quick processor.
I think that is about normal, I have been getting about 6 and a half hours of usage when I need to re-charge, so that seems fine to me, although some of the posts I have read seem that they have a super battery that goes for ever, I called apple today to ask if mine was normal and the girl said yes, so I'm just going to stop worrying about battery life, or at least try to
A lot of variables to consider when comparing usage
I know everyone here wants a gold standard for how much "Usage Time" their battery will last on a single charge, but that gold standard does not exist. I see people getting 3-4 hours, I see people getting 8 hours.. and people getting frustrated when they get 3 hours and others get 8 hours, thinking their battery is defective.
The fact of the matter is, battery life on the iPhone is dependent on so many factors it is impossible to say how long your charge should last. If all you are doing is playing music on the iPhone, you can probably get usage time of 12 hours or more. Playing music counts as usage time, but does not use that much battery power, especially because most of the time you are not powering the screen. Look at how long an iPod can play music vs. play video. The ratio is like 5:1.
Each application on the phone is going to drain battery life at different speeds based on how CPU intensive it is, how much you use the screen, what hardware features are being used (EDGE vs. WiFi, bluetooth, screen brightness, etc).. So again, it is impossible to say how long a battery should last. It comes down to each individual user and how they use their phone.
I know everyone here wants a gold standard for how much "Usage Time" their battery will last on a single charge, but that gold standard does not exist. I see people getting 3-4 hours, I see people getting 8 hours.. and people getting frustrated when they get 3 hours and others get 8 hours, thinking their battery is defective.
The fact of the matter is, battery life on the iPhone is dependent on so many factors it is impossible to say how long your charge should last. If all you are doing is playing music on the iPhone, you can probably get usage time of 12 hours or more. Playing music counts as usage time, but does not use that much battery power, especially because most of the time you are not powering the screen. Look at how long an iPod can play music vs. play video. The ratio is like 5:1.
Each application on the phone is going to drain battery life at different speeds based on how CPU intensive it is, how much you use the screen, what hardware features are being used (EDGE vs. WiFi, bluetooth, screen brightness, etc).. So again, it is impossible to say how long a battery should last. It comes down to each individual user and how they use their phone.
I agree with you, but i know for a fact some people have really short charge times, so i was starting to think i had the same issue.
Come to think of it, if i compare my iphone to the "old" blackberry curve i had, it makes sense.
I was using the blackberry mostly for calls and emails, since browsing and music weren't fast or user friendly and still had to charge almost every night.
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Take it back- they'll replace it.. Mine did the same thing and they replaced it on the spot..
Look at the iPhone page on Apple... they only rate about 6 hours of Safari-time. Yours is pretty much typical for very data-heavy use. I was seeing the same thing. Then one day I just used it less for web browsing and more for bejeweled and iPod use... and the battery life is like night and day.
Cut down a bit on the web/e-mail, and the battery life will be much nicer.
I don't really trust the battery meter on this thing. When it gets to the 20% warning it seems to take about 25 min or so until it is completely dead, and that is if I put it on standby when I get the warning. I go to pick up the phone 25 min later and it is dead.
I also noticed the icon jumps around a lot. It will be at about half, then I will plug it in and instantly it jumps to over 3/4 full. Either it is just insanely fast at charging or the meter isn't accurate. Once it gets past the halfway point it seems to drain much faster than the first half of the battery.
Also, everyone should look at their screen brightness. This probably has the largest effect on battery life of any setting you can mess with.
I also noticed the icon jumps around a lot. It will be at about half, then I will plug it in and instantly it jumps to over 3/4 full. Either it is just insanely fast at charging or the meter isn't accurate. Once it gets past the halfway point it seems to drain much faster than the first half of the battery.
Also, everyone should look at their screen brightness. This probably has the largest effect on battery life of any setting you can mess with.
Agreed.
what are your brightness settings? i just switched from half to about 1/4.
we'll see how much battery life improves.
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Hmm, wifi def eats up batteries. After a full charge -
Turned wifi off (turned on for about an hour at home for web/email).
Usage: 12 hours
Standby : 1 day 8 hours (this curiously includes the 8 hour period where I shut the iPhone off)
Probably about 10 hours of ipod (with screen off for about 80% of that - rated about 30 songs or so for other period), 1 hour of net usage, 1 hour of talk. A few SMS.
I have a sliver of power left and haven't gotten any warnings yet.
With wifi on all the time I could barely get a day in.
Edit: also turned brightness down to about 1/3..
Turned wifi off (turned on for about an hour at home for web/email).
Usage: 12 hours
Standby : 1 day 8 hours (this curiously includes the 8 hour period where I shut the iPhone off)
Probably about 10 hours of ipod (with screen off for about 80% of that - rated about 30 songs or so for other period), 1 hour of net usage, 1 hour of talk. A few SMS.
I have a sliver of power left and haven't gotten any warnings yet.
With wifi on all the time I could barely get a day in.
Edit: also turned brightness down to about 1/3..