Q: iPhone 4s Battery Life?

@sydalmighty

sydalmighty wrote:

 

kindly post in english..

Ok. I am not the first or the last who did it or who will do it!

 

they should put a rule here that forum users should not post in any other language as this has a negative impact.

I agree!

hahahaha

they should put a rule to spank you out of here

So you don't seem to grasp what I said - yet it was so obvious for someone who speaks the language... yeah, without Google translate, your "french education" seems a bit lacking... you're just fake. So who are you if you're not French speaking...

I advise you go DFU your device, maybe this will help you...

loooool

ok man:)

time for you to leave back to where you were? or maybe you still have something to say:)

btw my battery is going really good, usage time: 8h 12min, and standby: 31h 02 min, 24% left

Hi guys I didin't mean to add some fuel to this discussion, just want to share something. My iPhone 4S also suffer from the battery drain (about 5% per hour on good signal strength and about 10% per hour in area with bad signal strength, in this case where I live, totalling to about 20 hours of standby time and 3-6 hours of usage (mainly for browsing with 3G data connection)) and have tried everything suggested in this discussion to no avail. Today I tried to disable my cellular data usage from Settings menu after I fully charged my phone. Guess what.... it reduces my battery drain significantly  to 1%  per 2 hour. I guess the battery drain have something to do with the phone trying to actively mantain cellular data connection to the network (those who've been using Nokia phone are sure to remember that there is an option to use data connection when needed or when available and how it does affect the battery life by about 20% (my estimate, pay no mind to the calculation)). During my usage I notice that the iPhone tends to cling to 3G network aggressively despite the signal quality. I saw the signal indicator changed from full bar of 2G signal to 1 or 2 bar of 3G signal.

Just for info I'm using iOS5.0.1(9046) with WiFi & Bluetooth OFF, Siri OFF, no push email, iMessages disabled, weather widget active, location services enabled for map, compass, and weather only.

Just my 2 cents but 5hrs of real 3G internet browsing with 20 some hrs of standby would be pretty much on par with spec i.e. 5x16% (80) +20x0.5%(10%) =90%. But it's a bit weird that cellular data off would stop your drain per se, as this leaves 3G calls possible and then why would that not cause a drain too i.e signal? Maybe an app or feature just doesn't have connectivity when you put your 3G data off and that does the trick... then finding the app or feature would allow you to remedy that and keep 3G data on for the rest. Or maybe I'm wrong...

Good luck!

Here are a few tweaks that I posted earlier on myblog, based on my research and they definitely helped my 3GS's battery life, maybe they'll help you guys as well:

http://technodedigest.wordpress.com/2012/01/16/performance-and-battery-tweaking- ios-5/

One other tweak, which is expected to surface in iOS 5.1 is the switch to turn 3G off. Keeping 3G on is a real battery killer, even on my 3GS, so hopefully when iOS 5.1 is released, iPhone 4S users will be able to switch it off when not needed and save some battery life.

Good luck guys!

P.S. Also make sure that if you are on an iPhone 4S, that it is running iOS 5.0.1 build 9A406 and not 9A405. It will fix some radio issues, and so it will also lead to less signal searching time and in turn less battery usage. :-)

Actually the 3-6 hours usage is what I got from the Usage menu, but in reality I only actually used the phone (pick up and unlock the screen and then fiddling with it) for about half of it. Perhaps it's the so-called 'phantom usage' I've been hearing quite a lot in this forum. The phone seems to occassionaly 'wake up' by itself to do something (perhaps 'sleepwalking' ).

This is one good phone but I really wish this phone have more standby time. I don't mind the drain when I actually using the phone, but it does drain heavily even when not in use. The drain is a kill for those who travel a lot (not me by the way), but perhaps not a big deal for people who always sit in front of the desk or have the power slot readily accessible for charging.

As it was said already a number of times, the current iOS 5.0.1 for iPhone 4S does not have the feature to turn '3G data' OFF. You can only disable 'Cellular Data', which included 2G and 3G. iOS 5.1 will provide the knob to switch off 3G completely. On an GSM network, you donot need 3G to make voice calls!

Also, you can happily use 'Cellular Data' on 2G via EDGE and similar protocols, up to 200 Kbps. (which, by the way is the bandwidth required to claim you have '3G network').

Do not underestimate the influence of weak or weird (it may be super strong, but otherwise distorted) cellular on battery life. Yes, we know well the experience with Nokia GSM phones. Nokia, at least in Europe is the company that supplies cellular equipment, including most of the base stations. They know better than anyone how this stuff operates and what quirks the higher speed modes have.

Then, 2G and 3G are quite different networks. While 2G is "circuit-switched" for voice calls and for some data connections, 3G is purely packet switching network, that "unites it all" and of course without attention creates all sorts of troubles. The iPhone, being designed for mostly US carriers until now is traditionally lacking fine grained control -- but with the introduction of the iPhone 4S, being a "world phone" this is likely to change.

Yes dkalchev, except for one little detail, when you turn off "Cellular Data" that does not switch off the 3G radio, only the data connection between the phone and the dial-in server and so the phone will continue to search for 3G signals as well.

My phone is working better now that I restored it. But I am wondering if it is appropriate for a new phone...  I have 18 hours standby and 4 hours of usage (no calls - just some Internet on wifi and a bigfish game for a bit). I have 21% batt left. I am wondering if that is good or not? It says that it should have up to 200 hours standby and up to 8 hours of talk time. It seems that talk time would take up a lot more batt life than just Internet and app usage.

Also in the last couple mins I went down to 17 % since I started typing.

Until you have at least 10 full charge/discharge cycles your battery will not have reached it's rated capacity.

With Litium-ion batteries, a 'full cycle' is when you charge/discharge the amount of it's rated capacity -- not how many times you put it to charge. Also, for this process, it is not neccesary to discharge the batery fully. You can for example charge it 20 times when it is at 50%.

The 'full discharge/charge' cycle is typically only neccesary for the internal battery measurement circuits to calibrate and it makes sense to only do it, if you see your battery meter is way off - for example, when it sits lots of time at 1% charge, or when the indicator shows very rapid non-linear discharge.

For many people with brand new iPhone 4S's it seems the 'full discharge then charge overnight' cycle only helps, because it increases the number of initical cycles to get the lithium-ion chemistry ramped up.

With regards to the need to restore. There are two issues here:

1. If your phone had iOS 5.0.1 build 9A405, as most iPhone 4S on the market today, when you did Restore in iTunes, it will load iOS 5.0.1 build 9A406. You are not offered this as an 'upgrade', because the version number is the same. I believe Apple handled things this way, because it would otherwise confuse consumers -- 9A406 loads only on iPhone 4S and if it was labeled 5.0.2 owners of other models would wonder and question what "new" is inside. Build 9A406 has new modem firmware (that control the radio chip) and apparently resolves some of the phantom Usage problems.

2. I have my theory, yet unproven, that many iPhones get some preconfiguration settings at the carrier. These settings might be suboptimal and when you Restore, they are gone, completely. That is, you get brand new, 'virgin' iPhone. They way it was designed/setup by Apple.

The actual spec of the iPhone 4S says "200 hours of standby OR 8 hours of talk time (on 3G)"

Oh, I definitely needed I restore - my "phantom usage" was happening 100% of the time (ex. Usage 5 hours, standby 5 hours even if I hadn't touched my phone). Its not doing that anymore but I have only had it since Friday so I havent charged it enough yet I guess. I will keep waiting to see what happens.

While this is true, it will not search, if there is no demand for data. When you have data flowing, the phone would search actively for 'better' signal. Therefore, by disabling Cellular Data, you prevent the additional initiative to search for better 3G coverage. Also, that PPP connection has keepalives etc.

As the 3G radio is 'pure data', it's power consumtion is proportional to the amount of data it transfers. This is why the iPhone has longer battery life when browsing on WiFi. This is why, if you have access to WiFi you are better with enabling WiFi at all times (except Ask to Join Networks), as chances are most of your data will bypass the 3G radio, even if you have Cellular Data enabled (it will be only used when there is no WiFi coverage).

With only using 3G for voice and being in standby, your phone wastes power to only search for better signal (this is listening, low power) not for transmitting (high power). It will waste more power however, if it has to re-connect to another cell tower.

That would be an ideal way of looking at things, however that is not the case (unless the 4S is built differently). But this can be disproved by entering the phone's Field Test mode and seeing for yourself. GSM and UMTS are two different cell environments, and the iPhone has precedence to connect to the UMTS network over the GSM network; furthermore, the 3G radio is not a pure data radio, and UMTS is not a fully packet-switched infrastructure, only partially (however relatively more than GSM).

So when you turn off 3G, you are in fact turning off the UMTS radio and disabling the phone from searching for or connecting to the UMTS network, leaving it only searching for and connecting to a GSM network via the GSM radio. However if you leave 3G on, but only turn off Cellular Data, the iPhone remains connected to and searching for a UMTS cell environment (disconnecting itself from the GSM cell environment), however it does not initiate a data connection.

You can test out these different cases by entering Field Test mode and seeing it for yourself, by dialing the following code: *3001#12345#*

I believe you have added the pieces I elected to skip, to not get into much technical detail. Yes, the iPhone is built differently than most GSM phones (relies more on the data path) but the key thing remains: as long as you don't transmit data over 3G you are consuming less power.

Perhaps posting such instrctions in a forum like this is not very productive, but... at least people who suspect network problems might verifying what power their phone uses to transmit. In UMTS Cell Environment - UMTS RR Info. Numbers way below zero dBm are better.

Yes because THEY COULD NOT PURCHASE THE  DEVICE THEY ALL WANT AND STOOD IN LINE FOR!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!  Not because 80% had static or faulty chip and poor battery life. Again facts please. .

BTW it is hard for you to use folks id as it really is without adding your edited version of it? Are you like 13 or what?

enx23 wrote:

These are believes! Apple got eggs thrown at its store in China.