Ive managed to virtually eliminate the standby drainage keeping wifi off when I don't need it and turning other unnecessary features off, but my main problem is the battery drainage while using the phone. No matter what I'm doing on the phone, I experience 1 percent drainage every 3 minutes (sometimes it only takes 2 minutes). I hope the new iOS update does something about this.

If you charge your phone over night you will a have a combined standby/usage time of 16 hours. With every full charge the life of the battery get worse (count the load cycle).

http://www.apple.com/batteries/

If you want to avoid damaging the battery you have to try use the phone from full to empty - if you get 30 hours it will be next in the middle of the day empty, this is the problem! This is why i mean i "need" 40 hours, this will be 2 days and one night = charging every second day over night.

We had two 4s, i was the "heavy user" and my wife used the iphone only like an ipod (NO cellular data plan, Wifi, BT, Text or calls, simply NOTHING) - just 1h20min per day music, the brick was after 30h empty :-(.

I had to laugh as the genius adviced to shut off the equalizer - but after that i read that also on the german page from apple. This is poor and ridiculos.

http://www.apple.com/batteries/iphone.html

And yes you are too easy and you don't want to understand the problems of the user. Please read, understand and after that maybe write something usefull.

rphunte42 wrote:

 

I quite fail to understand why so many users seem to charge their phones, then go to bed and let it sit on standby all night. For over a year, my wife had charged her 3GS overnight, every night, and that makes sense to me.  The phone gets a full charge, and she doesn't need it during the night anyway, as she doesn't talk on the phone in her sleep.  So, I do the same, and I always have plenty of power at the end of the evening.  That solves the 33% loss you had, and moves that to the period of time you might actually use the phone.  Now, you used 23% charge in 7 hours, which is about 3% an hour, so you would get about 30 hours to use your phone in one day.  Maybe I am too easy, but that sounds adequate, if not particularly great, to me.

Hi, has anyone updated 4S to latest 5.1 beta 3? Is there any improvement for battery life on 4S for this latest beta?

I just saw some reviews in german, they mention the 2G-3G toggle and also a stabilization of the drain, but not a "dramatical" improvement.

@marc-man Sorry for the late reply, I looked at the replies only by email. Yes, my serial number does start with DN.

I took out my iPhone 4S from the charger at about 8:20AM (my timing) and right now it is 3:40PM and I currently have 79%. I had 3 phone calls, one for 40 seconds, another for 59 seconds, and the third for 13 minutes, which results in a total of 14 minutes and 39 seconds call time. This is the only thing I did with my phone so I didn't open any apps and all apps are closed in the background. There is clearly a huge battery drainage problem with my iPhone and I tried about everything that says in this post.

Here's some info about Li-ion battery

http://batteryuniversity.com/learn/article/the_high_power_lithium_ion

"Do not discharge lithium-ion too deeply. Instead, charge it frequently. Lithium-ion does not have memory problems like nickel-cadmium batteries. No deep discharges are needed for conditioning.”

http://www.techatplay.com/?p=61

“...if the charge of your lithium ion battery falls too low, the battery can get irreversibly and permanently damaged. So since Lithium Ion has no “memory effect”, it is better to simply charge your portable device as and when you can or remember.”

“ ...constantly recharging a lithium ion battery does not shorten the battery life more than normal usage would. Avoid letting it sit on empty for too long; instead, keep it charged-up if you can.”

http://voices.yahoo.com/how-recharge-li-ion-battery-2542399.html

“Charge often - Older electronic devices commonly used Ni-Cd batteries which benefited from deep cycling - allowing the battery to fully drain before recharging. Li-ion batteries on the other hand benefit from being charged often and early on in a fresh cycle. What this means is that a li-ion battery should be charged well before it is fully drained; think about when you plug your cell phone in to charge at night. You don't need to wait until the battery is running low to recharge it if it is a Li-ion battery.”

“Re-calibration - The exception to the above rule about charging is that about every 30th recharge or so, you should allow the battery to be nearly drained before recharging. This helps to re-calibrate the external battery meter on your electronic device. Your cell phone, laptop, or other device displays the amount of battery life left on it's display usually. Re-calibration ensures that your electronic device is giving you an accurate reflection of the actual battery life left since the last recharge.”

The only reason to discharge Li-ions/Li-pos is to give your battery meter more accuracy. They still shouldn’t be run all the way to shut off, if anything just on the off chance the low-current protection circuit fails, thus doing permanent damage to the battery. If you’re not going to use a Li battery for a while, store at 60% charged in a cool place.

You can't run the Li Ion in the iphone to 0%, the iphone get shut off by system management - it apears to have 0% but the Li Ion has more %.

That certainly is excessive.  If you have easy access to an Apple Store, you might want to make an appointment to have the phone checked out.  Meanwhile, check earlier messages for things you can try yourself.

guitardude7 wrote:

 

Ive managed to virtually eliminate the standby drainage keeping wifi off when I don't need it and turning other unnecessary features off, but my main problem is the battery drainage while using the phone. No matter what I'm doing on the phone, I experience 1 percent drainage every 3 minutes (sometimes it only takes 2 minutes). I hope the new iOS update does something about this.

AliAR wrote:

 

@marc-man Sorry for the late reply, I looked at the replies only by email. Yes, my serial number does start with DN.

Take a look at my latest post here: https://discussions.apple.com/message/17259821#17259821 - might be of help to you as your problem sounds exactly like mine.

Unless you have just about everything turned on, 10%/hour is way more than is reasonable.  Even with light use, mine uses only about 1.5%/hour.

iau wrote:

 

My Iphone 4G suddenly started to drain battery, but now it seems okay. Fresh charge in the morning and it only loses about 10% per hour when no apps are running. I usually charge it when I get how for work in case I want to make a phone call in the evening.

i faced the same situation but after searching over internet i'v found the solution to fix my battery life.

I hope this wil help you and every one who faces same battery drain issue
solution:
settings>general>date and time>set automatically>turned off. that's it.
set manually your location.

it solves the battery drain issue for me now i am 7hrs standby on 92% battery indicator.

form this video i got the solution

How to dramatically improve Iphone 4S Battery Life

http://www.youtube.com/watch?v=F-Sc091sDbU&feature=related

marc-man wrote:

 

AliAR wrote:

 

@marc-man Sorry for the late reply, I looked at the replies only by email. Yes, my serial number does start with DN.

Take a look at my latest post here: https://discussions.apple.com/message/17259821#17259821 - might be of help to you as your problem sounds exactly like mine.

The post is very convincing and I am very satisfied by it. Unfortunately, I live in Dubai, United Arab Emirates and not in the US so I don't have an Apple store here but rather have official Apple resellers. I will try to talk with the company I bought my iPhone from to replace my phone but I'm not sure if they will actually replace it.

One more thing, I didn't have the battery drainage problem until about December 20 - bought it on November 8. I had perfect battery and in a 7 hour sleep, about 3-4% drained. I don't really know what has come up with my phone.

Do you still think I should replace my iPhone?

With the usage figures you report, It appears you may have a rogue task running.  Did you get a SIM card from an older phone?  If so, go to your service provider, and get a new one, then clear the phone settings, and try again.  I find 13 hours of usage in 22 hours a bit more than is believeable.