Off everything except 3G (push mail, notification, wifi) Battery 100% at 1130pm, went to sleep and left it idle. At 655am, battery level at 98%.

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Added on September 26, 2009, 7:51 amafter playing with the iPhone for about 10 mins with safari and WIFI on.... battery is at 92% at 7:10am.... now back to idle and will see how the battery perform...

This post has been edited by cvchua: Sep 26 2009, 11:59 AM

if u OFF push and wifi n bt...it can really last longer (FW3.1)

Agreed. It decrease power consumption especially turning off the Push Notifications and Push Email alone. I think iPhone OS's power management is a little bit weak here.

ya... such a nice phone yet poor power management makes it dull phone.... (pasal have to off most of the things)...

Not only that, the iPhone has a weak battery capacity to begin with. If Apple continue its line of iPhone with this battery, I can only imagine how the battery performance gonna be. Although the ARM Cortex A8 running at 600MHz consumes a lot more energy than the ARM11 core running at 400MHz+, the fact that it can have comparable battery life is due to the CPU going into idle/sleep mode faster and most of the time. The reason why some iPhones are seeing higher consumption is due to a process (I suspect) within the iPhone OS that is preventing the CPU from going to idle/sleep. It could be a function/feature of a program you recently installed or the power management as a whole.

I see two ways to resolve this issue. One is to resolve/optimize the OS's power management system as well as the processes. I believe Apple is going this path because it is allowing selected users to install some battery app that will monitor and provide information to Apple. This is a good way to trace where is the culprit.

Second is to just increase the battery capacity. Its god damn time now. For this reason, I believe the next iPhone will have a much different form factor. It could be bigger or not so slim anymore. It can either achieve this by reducing chip count and thereby reducing PCB area to allow a bigger battery or increase the size of the end device to allow a bigger battery to fit in. Or maybe Apple is banging on some battery magic where we can have a much bigger battery capacity on almost the same size. Probably Apple is also throwing in an ultra efficient higher resolution display (smells AMOLED due to its association with Samsung. Most of its CPU is Samsung anyway). For this, I may regret the 3GS because its ARM Cortex A8 + PowerVR SGX is gonna be wasted not having video HD capturing/playback like the Omnia HD.

Apple has already refreshed the underlaying platform for the next generation of iPhone (via the introduction of 3GS). So the next refresh will be the form factor. You can almost see the same trend with its other products. Its gonna be a 4 year cycle. First a new form factor, second a refresh of platform/hardware, 3rd another new platform, 4th another refresh of platform/hardware. And the cycle continues.

This post has been edited by davidmak: Sep 27 2009, 11:55 AM

If youre concerned by the battery life of your iPhone there are a few things you can do to help it last longer:

* Run your battery down completely at least once a week and recharge it for at least 5 hours. A lot of people think you dont need to do this because the new iPhone uses a li-ion battery but apple claims it keeps the software calibrated and should result in a noticable improvement in battery life.

* Turn off 3G - making calls using 3G uses up more batter power compared to using EDGE.

* Turn off Bluetooth

* Turn Location Services off.

* Turn off PUSH email and set FETCH to 'less often'.

What is Location Service? is it important?

its just a method the iphone uses to know its location by triangulating radio signals. not particularly useful unless you want your iphone to be a mini heater

What kind of application will use this location service?

compass, maps, gps, qiblah direction n u can figure out the rest ^.^

Yes, and it also involve the activation of the GPS. Turning this off is helpful. So if this service is ON, any programs/apps that rely on location service would access the GPS and triangulation via GSM and WIFI.

Location Service, how big is the impact to battery life?

Well for those ppl who doubt that FW 3.1 reducing battery issue, see my snap shot. These are the 2 diff snap shot where i fully recharged my phone. I am very happy on this. Too bad u guys are still suffering this issue.

This post has been edited by sakak: Oct 1 2009, 09:11 AM


Attached thumbnail(s)

What are you trying to say?

there is some ppl doubt on FW 3.1 shows less battery consumption in previous post

Sakak, what i mean is i don't understand your comparison of the 2 snap shots.
What is conclusion after the comparison? Are you trying to say that the FW3.1
will not causing fast drainage of battery life?

So for the pass few weeks my phone's battery has dropped to red level and off by itself when it was green. What gives? I've been charging it off my laptop because I left my charger in my home town. I'm on 3.1 by the way.

This post has been edited by The Hardest Thing In The World: Oct 1 2009, 10:49 AM

If you let location service turned on, any program that uses location feature will attempt to use the following location options when executed:

1. GSM/WIFI triangulation
2. GPS

And we all know how draining GPS is. So if you have programs that is location aware and has push notification turned on. It'll attempt to get a location fix, etc. This can be one of the scenario.

But it won't trigger the location service unless I open an app that requires it right? So if I leave it on won't have impact of battery life right?

oooo there are no comparison between this 2 pictures. they are the same FW 3.1 but different after charging status