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short battery life for iphone 4, need a fix

started with 100% battery life: after 2 hours of use of my iphone 4; 2 short phone calls, 20 minutes on internet checking mail and , 1 txt messaging session lasting 5 minutes, i have 85% battery life left. is this normal battery drain.

Posted on May 2, 2011 7:52 AM

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29 replies

May 2, 2011 10:47 AM in response to trails247

My first iPhone 4 Had terrible battery life, it would drain in an entire day with no usage and get extremely hot with minor usage. I exchanged it and now have had no issues until recently where I'm in the same boat as you, I dock mine over night and use it as a clock for my room, when I undock it close the apps and leave it on my desk in about 10 minutes it's already at 95% without being used. Today in a matter of 30 minutes of sending about 5 texts I was at 85%. now mine sounds a little more rapid of a drain then yours but I was under the understanding the battery was supposed to have a decent life span, and mine always has until now. Now it drains with little to no use so I ask trails247 how can you say that sounds normal?

May 2, 2011 11:00 AM in response to Sparky87

I'm saying, I have had the iPhone 4 since launch day last year in June, and this phone is a battery beast. No matter how you look at it. Now your 30 min of use seems a bit extravagent. I am saying that the previously mention situation (2 hours of use) and it goes down to 85% sounds about normal.

You have to understand that this phone is doing multi-tasking, notifications and all sorts of things phones used to not do. You can help save battery life by turning of location services, notifications, turing down the brightness on the screen, turning off wifi and 3G when not in use.

May 2, 2011 11:09 AM in response to trails247

trails247, I have had mine since launch too and the first phone I had, had issues. and I know all about the "new" features and how to maximize battery life and do all of those things. But in the last 2 weeks or so the amount of battery usage my iPhone 4 uses has almost doubled it's original usage and makes no sense. I have all of my settings the same.

May 2, 2011 11:14 AM in response to Sparky87

I will say this, I found out that AT&T does uploads over 3G at night (usually around 3AM) in large quanities. I don't know if that helps all. Ever since I upgraded to 4.3.1 and now 4.3.2, I will say I have lost some of my battery life as well, I just kind of accepted it as normal. I am not saying I am a battery expert, but the phone does a lot of things even when in idle. Like a computer.

May 2, 2011 11:37 AM in response to trails247

Once the battery is fully charged, charging stops though, and the phone will just run on the mains power. You can safely leave an iPhone plugged in all night long, no worries. I've been doing that for years (I use a dock on the bedside table), and that way, it is always fully charged when you are ready to go in the morning.


In terms of battey use, obviously it varies drastcially as peoples pattern of use varies so much. But, with any smart phone if you are using the features a lot (email, especially push, texting, calling, web surfing, watching video and live feeds, reading news sites, ebooks, taking notes, using GPS/location services) etc, etc) you will need to charge the phone daily. If you are a heavy user, get yourself a car charger and an extra one for your office or work - I basically plug my iPhone in whenever it is convienent to do so (office, car, home, wherever I am easily near a place to plug it in) so it is always juiced up for when I am on the go.


Li polymer batteries are not harmed at all by very frequent partial discharge/charge cycles - in fact, they will last longest that way (it is repeated deep cycles that take a toll).

short battery life for iphone 4, need a fix

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