Fast Battery Drain?

Discussion in 'iPhone Tips, Help and Troubleshooting' started by Erieg, Jun 19, 2009.

  1. Erieg macrumors newbie

    Jul 18, 2008
    UPS dropped off my phone a little bit ago and I love it so far but two things struck me as odd. The first is that my battery drained fron 100% to 72% in roughly half an hour. In that time all I did with the phone was turn it on, start a few apps and ran a speed test on the 3G network.

    It should not drain that fast. At this rate it will last a few hours with no usage. Is anyone else having this issue?

    Another strange thing is that the speed test I ran came in at 600kb down/100up. That is slower then my 3G phone (I tested it at the same time)
  2. RKilbane20 macrumors 6502a

    Jun 9, 2009
    I have had mine since 9:50 and my battery meter says 93%
  3. jayge macrumors newbie

    Jun 17, 2009
    me too. put for a full charge before i really started to use it and already back to 95% after a couple texts.
  4. Erieg thread starter macrumors newbie

    Jul 18, 2008
    Ok. With a full charge (charged it all night) I performed 3 speed tests and the phone went from 100% to 82%. An 18% hit in 5 minutes. I wonder if it is just the percent meter thats off.
  5. mattpreston11 macrumors 6502a

    Nov 9, 2007
    yep im getting some pretty worrying numbers on the battery meter. im draining my battery then will recharge it fully. will hopefully get some better results then. i have push on but i would really perfer to leave it on..same with 3G and location services.

    maybe its just a 3.0 issue?
  6. alejovh1 macrumors regular

    Apr 24, 2008
    check your settings and turn the location off if you dont need it. the gps drains the battery really fast.
    my new 3Gs rocks, yesterday from 3 pm to 9 pm with heavy usage went from 70% to 35%.
    way better than my 3G:)
  7. jontucker macrumors 6502

    Nov 5, 2007
    I think my 3Gs is draining the battery pretty quickly too.

    My 3G would happily last all day with Wifi, Bluetooth, Location, Push and 3G turned on (although I rarely had a 3G signal where I live). I charged it every night.

    I charged my 3Gs last night before going to bed (100%) and when I woke up it was at 84% and having had moderate use today it's just died on me.

    It could be because 3G is now using more juice. It could be because I'm using it more because it's new. Hopefully it's the latter and it will settle down once the novelty wears off again!
  8. AHDuke99 macrumors 68020


    Nov 14, 2002
    Charleston, SC
    False. Since 2.1, it no longer matters if GPS is on or off. IT does not affect the battery life.
  9. kvasir macrumors regular

    Oct 9, 2007
    Are you sure about this? If I leave location services on (and don't use GPS), the battery seems to drain faster.
  10. Michael CM1 macrumors 603

    Feb 4, 2008
    That's definitely faster than it should be. A new battery will have shorter charge cycles at first, but after about a week it should be at its peak. I'd wait a week and see if it improves.
  11. fdot macrumors regular

    Feb 2, 2008
    1st drain and then full charge is today, 7 hours, 57 minutes standby... usage 1 hour, 3 minutes..... 77%.... doesnt sound to good
  12. MajesticNJ macrumors regular


    Jun 20, 2009
    Central NJ
    Glad I'm not the only one...

    1st full day with the 3GS 32 gig. Charged all night. Took it out. Was great really. Lots of juice. Then it started sinking faster and faster so I charged it. Was at 40% when we went to dinner. While at dinner I saw it at 34%. Within a few SECONDS of that, the phone turned itself off and would not come back on.

    I then took it out to my car and plugged it into my charger. It showed the battery as completely dead! I saw it go from 34% to NOTHING almost immediately.

    So then, after that I charged it up on the ride home. The phone worked great. I ran it down to below 17% then took it downstairs to charge for the night. That's when I noticed that it said it was at 17% but then almost right after it backed up and synced, it was at 77%!!!!

    I don't get it. The local Apple Store is closed for renovation and I doubt ATT can change out the battery so what's left to do?

  13. cosmaboy macrumors member

    Jun 15, 2009

    does anyone feel like the battery metre is crap!

    I have a 32 gb 3gs and charge it all night and it doesn't say 100 % charge only got up to 99% is that right????

    Also completely drains in 1 day of use and that's not when it's been overlyused.

    I think my 3g battery is better!
  14. acseven macrumors member

    Jul 30, 2008
    Try disabling Push.
  15. ntrigue macrumors 68040


    Jul 30, 2007
    You guys are experiencing problems. I've had 3GS for two cycles now and am astonished at the battery life. Leaving it 8 hours puts me at 96%.

    Have you drained completely then recharged?
  16. MajesticNJ macrumors regular


    Jun 20, 2009
    Central NJ
    Latest update. I took it in to see the Genius' today. They ran diagnostics on the unit and said that there is definitely something wrong so they gave me a brand new replacement. They said the unit's best standby time was 3 hours and it should have been far more than that. He also said that the current percentage showing was 90% but the diagnostics showed the phone had about 1.4 hours left of standby. Since they couldn't replace the battery, brand new phone it was.

    Just wanted to let you all know.


  17. Erieg thread starter macrumors newbie

    Jul 18, 2008
    LOL.. great. so I tested video today. Started at 100% Played all three Lord Of The Ring movies. Almost 10 hours no problem. I charge back up to full and load one web page using 3g and go from 100% to 96% in 30 seconds. Something is off.. I am thinking the meter.
  18. MajesticNJ macrumors regular


    Jun 20, 2009
    Central NJ
    Just a follow up. My new phone has not exhibited this problem so far. Crossing my fingers and hoping it stays that way.
  19. germanjulian macrumors regular

    Jun 10, 2009
    I did some testing and I am 90% sure that the more the battery gets drained the slower the % of the battery goes down.
    To go from 100% to 90% is much faster then if you go from 40% to 30% for example and so on.

    I recon it measures the voltage to get a %. and that is not accurate.

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