I think it could be all the apps running in the backgroud, turn off all background apps, and turn off location services.

I did all that and saw a marked improvement in battery life...

my first charge went from 100-20% in 13 hours...

Now i'm on my second charge and turned all those off, 4 hours later and 20 minutes of phone calls, only dropped 6%

@DaIdiot I dunno, if you buy a smartphone n turn off all the smartphone features... what's the point?

I agree with @DaIdiot to exit all the unncecessary apps in the background, especially games. i would multitasked only those useful apps la eg: Beejive perhaps?

Game app i would strongly suggest to exit, dont let it run in backgroud. tat would help to prolong battery life i believe

uh.. i didnt turn it all off...

i still have my push email, push messaging running all the time.

But whats the point of leaving the location service a.k.a GPS on? it drains battery

The point is to save battery..
Only turn on the features when u need it la...

This post has been edited by Nidz: Sep 27 2010, 12:42 PM

For the iphone 4 charging, i plug in the cable to the device, the power open automatically, can i switch off the phone or switch on to charge the battery?

This affects every set since the hardware design is the same to begin with. Ignore the rumour of revised antenna that is already in place or in the pipeline. It has no basis and is unlikely to be true. Some people can't reproduce the antennagate issue probably because of stronger network coverage.

This post has been edited by giovanni: Sep 29 2010, 07:00 AM

Oh ya,if my iPhone 4 left 40% battery.
Should wait it until 20% below only charge or just charge it?

Since that a lot of people have been asking about the battery performance.. this is my latest battery usage time and basically its life's statistic

i also want to check out for tis... my i4 battery drain very very fast....its like gone within half day...i played IM, FB, MSN, What apps, some call and sms, browse net....tis is not include my push mail coz i yet to set it up....is tis normal????

check that your multitasking... make sure there are not a lot of applications which are running background and can drain your battery

Check if you turn on Wifi AND 3G as well. Use only one, not both. I use 3G only and my phone can last more than a day for a full charge. I make calls, SMS, MMS, surf the web, play some games like MGSTouch and Angry Bird, use Facebook, and check mails. Usual stuff that would drain my 3G in less than 3 hours or so, granted, my 3G has a broken Wifi.

i runnning on data plan...purely on data plan coz i always move around...wifi is off all de while...but battery still drain very very fast....something with my phone battery???

How many apps are there in your multitasking bar?

for those who have short battery life, what IOS are you on?

best to charge it b4 it even reaches 50%

we'll see what happen on Friday then i haven't got my i4 yet, jz thought wanna wait anything will happen after Sept 30th

To be honest IMO casing is not 100% solution to Deathgrip matters, it only 'reduce' the bad effect, thus we thought it is THE solution. my guess it will affect our data speed with casing. nonetheless, thats the only way for now

I got face this problem, after the charge already 100%(plug icon), than when i plug the 100% direct change to 99%.

When restart the phone it become back to 100%.

Is my iPhone normal ? ><||

obsolutely normal.....at times you would also find that it charges whole nite but only reach 99%

You only have to worry if whole nite u charge, max u can get like 80%

im not sure bout this cos everytime i charge i also get 100%