Q: Battery Draining much faster on 4S, what can I do?

I found an exact problem with my new iPhone 4S. It is really frustrating seeing my old 3GS battery last WAY MUCH longer than the new 4S. They both run an iOS 5.

There are many things you can try... turn it off or charge it over night, keep the brightness dimmed as much as you can stand it (yes, the screen back light uses more power than you might think) and don't use heavy-duty apps (games, etc.) that much or watch a lot of videos.

Stuff like that generally uses more power.

I have my 4s restored from backup from my 4. Just today at 1:38AM I closed all the apps running. The battery was a little more than half way with power, I woke up at 10:30 this morning and it was dead. Brightness is adjusted as low as possible, wifi was off and it was not being used at all. Basically from 1:38 AM to 10:30 AM with about 60% power and dead when I woke up. I'm charging it now basically calibrating the battery. But to me this is not good at all. My 4 running iOS 5 had a even improved battery life.

I think that's because you can't turn the 3G off... wait for an update.  At the meantime adjust your screen brightness, turn the EQ off, don't have too many apps running in the background, turn bluetooth and wifi off when you are not using it and etc

Wait till the new 4S battery has some loadcycles on it, then look again. Same happens to new macs sometimes: battery draining high in the beginning.

My Phones have the same battery life with 4.2, 4.3.5 and iOS5. But I do not own the 4S (yet).

You do not have to delete the mail accounts, just make them inactive in the iPhone settings and they will not get mail.

I have been having the same issue and I've noticed that my "Usage time" is way too high and not accurate. I also notice that my battery last longer when I am not at home which made me think it would be the Wifi.

I just turned off iTunes Wifi Sync and Photostream which both kick in on Wifi, my suspicions lead to one of those.

If it keeps acting up today Im headed into the Apple store tomorrow.

The battery is much worse than my 3GS but I think there is more to the story...

Reduce the screen brightness.

Disable email push and fetch. Set all to Manual.

Turn off bluetooth.

Uncheck everything in spotlight search.

Disable ping under Restrictions.

Minimize lock screen notifications.

Reduce number of apps/services using location services.

Turn off the phone at night.

Set wallpapers to a simple black screen (take a pic in a closet)

Disable vibrate; lower the ringer volume.

Minimize number of sounds used, like keyboard clicks.

Turn off any sound EQ.

Don't use the speaker phone too often.

Disable any iCloud use for now.

@rimshaker - So basically just don't use your phone and you should be a ok?  

I agree with tim: the longest battery life you have when you turn off the iPhone completely

I'm have the same issue. So frustrating we have to go through this with a new iphone. They need to fix this problem! My battery drained from 100% to 43% in an hour and 47 minutes.

I have to agree, I am draining at about 8% an hour in standby. 

I did everything I can find on here, removed stuff, turned stuff off, reduced brightness, turned off ping, turned off iCloud and reset the phone and turned it back on one by one.  Made sure all emails had fetch turned off, removed calendars and notes from email settings, etc..

I have it charging now with Battery Magic for a full charge w/ top off, so we will see.

Before with my iPhone 4 I would charge it every 3-4 days.  Now I need to charge it 2x a day.  That can't be right.