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3GS - incredibly poor battery life

I've had each generation of iPhone since they were launched in 2007, and upgraded from my 3G to the new 3GS a week ago on the day of its release. My experience with the battery life has been really, really poor. So bad that I sought out this forum yesterday and decided to run the battery down to zero just to see how poor its life was.

Here's what happened:

Yesterday I kept it plugged in and charged at 100% until 6 PM. I used it for ~2 hours of reading using the Kindle app and quick view of 1-2 web pages. This morning I woke up and read the news using a news reader app for ~1 hour before it turned itself off when it reached 1%.

Stats were 3 HOURS and 7 MINUTES of usage to drain the battery to ZERO. That was without calls, without video, without iPod use.

When I'm using it I can literally watch the power meter (which I've turned on the numeric percentage readout for) drain about 1% when I actually take any action on the device. I feel offended and mislead by Apple because the 3GS was supposed to have improved battery life. My netbook has better battery life (6 hours with extended battery while running its built in 3g mobile broadband service the whole time), and that's a full computer.

If you've had similar issues I'd like to hear about them and would certainly welcome any solutions that don't involve tweaking so many settings that the device doesn't work in it's default mode.

I'm recharging from the zero mark now. If the same cycle happens after another charge I feel like I'll have to return it to Apple after wasting a lot of time and simply move back to my 3G.

Given the amount of traffic on the forums about this issue, I think Apple had better speak up or they are going to experience a lot of damage to their brand.

iPhone 3GS, iPhone OS 3.0

Posted on Jun 27, 2009 6:49 AM

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380 replies

Jun 28, 2009 5:56 PM in response to ahawkinson

I have had this exact same problem.

I can literally watch the Battery Life percentage drain slowly during standby. Every 10 minutes or so, the battery life will drop 1%.

After 15 hours of standby and 20 minutes of use, my iPhone 3GS had 40% battery left.

When I play Tap Tap Revenge 2, the battery drains about 1% per minute of play. It's crazy!

- KJ

Jun 30, 2009 8:30 AM in response to ahawkinson

This is happening to me as well. I upgraded from the first generation iPhone to the 3GS and incredibly it seems that the phone that's 2 years old has a better battery life. I mostly use the phone for checking email and playing a couple of games, and maybe one or two short calls each day. I don't use the iPod functionality on the iPhone at all. The battery life is dismal. I honestly have to charge it every day, sometimes more than once. I switched off the "Push" functionality this morning after a full charge and the battery seems to be draining at a much slower pace. This is something that Apple should address, as it seems to be a OS issue. I don't know if the Push setting is constantly pinging servers.

As a separate issue, this OS seems to be a lot less stable. It's frozen on me about 3 times and it's only a week old!

Jun 30, 2009 9:13 AM in response to bosrican

I was having what I believe was a somewhat similar battery issue. Switched from the 2G to 3GS and saw significant battery drain. I'm now on 4 1/2 hours of intermittent, "normal" (for me) use, and I'm down to 99%.

"Normal" use on a workday for me is: Wi-Fi on, Notifications on, Push eMail on, Location Services on, 3G off (no 3G in my area anyway), checking the non-push eMail every 15 minutes (3 accounts + MobileMe = 4 total), a couple text messages an hour.

I ran the battery down until the phone shut off last night, and let it charge via the wall outlet overnight. I also restored the phone yesterday as a new phone, not a backup.

I have no idea (yet) if this is going to work. Part of me wonders (for me at least) if I'm not just watching the battery meter more, now that I have a percentage indicator. Before I'd never know if I was down to 95% as the battery icon probably doesn't change at that point.

Jun 30, 2009 10:02 AM in response to sidssp

I'm keeping my fingers crossed. I was actually somewhat surprised what I had to do to get it to go dead last night. It seemed like it would fall quickly from a full charge, but as I started trying to kill the battery, it almost seemed to slow down. I realize this is all perception.

I finally purchased some TV episodes on the phone, as I figured some 700MB video downloads on the phone should eat away at the battery.

Jun 30, 2009 11:11 AM in response to ahawkinson

I originally posted that i had poor battery run time issues on my new 3gs! I can now report back that after a week and a half of charging cycles the battery is not only better its amazing. Just for a goof a maxed out my phone features today. Wifi on, location services on, 15 minute fetch, push for mobile me! its 2pm and have 70% left! Thats incredible. To add to that i listened to my ipod for 35 minutes on the way to work today, and sent a few sms messages.

It seems that the new iphone 3gs just needs about 10 days worth of charging cyles to run at advertised battery times!

Im blown away.

Jun 30, 2009 1:21 PM in response to Noslak

If the screen is on and you are watching the battery meter, 1% every 10min is reasonable. That'll give you 16 hours with the screen on constantly. (100%/6% drop per hour)......


Noslak wrote:
I have had this exact same problem.

I can literally watch the Battery Life percentage drain slowly during standby. Every 10 minutes or so, the battery life will drop 1%.

After 15 hours of standby and 20 minutes of use, my iPhone 3GS had 40% battery left.

When I play Tap Tap Revenge 2, the battery drains about 1% per minute of play. It's crazy!

- KJ

3GS - incredibly poor battery life

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