But it does. I do it all the time.
The description of WiFi sync in general settings says. "Automatically sync with iTunes on your computer when your iPhone is plugged in to power and connected to Wi-Fi." So your iPhone will not use Wifi sync when it's not plugged in.
You can still sync your iPhone manually when its not plugged in to a power source. The option states that it will sync automatically when you plug the phone to a power source.
If iTunes sync is on, your phone will show up in iTunes even after it's unplugged.
Not the iPhone 4. That thing had amazing battery life.
As I just said, the option is grayed out for me, I can't sync unless it's plugged in, you have a bug.
It may not "automatically" sync, but if you press the "Sync" button in iTunes it will happily sync to your iPhone whether or not it is plugged in. In order to do this, and relevant to this thread, is the iPhone must be listening on WiFi in order for this to be possible - which does consume power. I'm not saying that is what is causing the trouble, but its definitely a suspect and a very reasonable discussion point.
It's grayed out because your phone is ejected from iTunes. It's not a bug, it's a feature. I think you have a bug.
50% drop in 12 hours is normal
It's grayed out because your phone is ejected from iTunes. It's not a bug, it's a feature. I think you have a bug.
Is that just in standby?
If thats with useage as well?, thats great battery life
Handset was warm.
So when I first updated all my devices to ios5 I had horrendous battery life. This is with an iPad 2, iPhone 4, and iPhone 4S
After trawling the Internet, I ended up turning OFF wifi sync
This has dramatically increased battery life on all these devices.
The iPhone 4 used to not be able to get through a whole day, now it finishes with approx 40% at the end of the day
The 4S is in a similar situation, but with a little less battery at the end of the day. I also had to re add all my exchange accounts on the 4S
This is coming from the 4S lasting about half a day after I first got it and had wifi sync on.
So YMMV but I reckon be sure to turn off wifi sync!
Thats a big indication, as you noted, of the GPS running. Sounds like you have tried a few things, so maybe a clean install as a new Phone might be the better option?
For all you guys with battery life issues
Is wifi sync turned off in iTunes?
wtf you guys.....
you do understand that these phones are BRAND NEW. All new iphones have to go through some recharge cycles for you to gain good battery life
Its an option but I would lose years of messages wouldn't I, so that would be quite an annoyance. I will monitor this thread and keep trying things but I've made a Genius Bar appt for Sunday just in case.
thanks