WIFI + Fetch = Battery Drain?

Discussion in 'iPhone' started by donm3ga, Aug 25, 2008.

  1. donm3ga macrumors member

    Joined:
    Aug 19, 2008
    #1
    Does having WIFI and Fetch on kill your battery? I know having WIFI and PUSH on does. I have had WIFI on all day connected to my work network and Fetch set to hourly. My battery looks to be about 25-30%. It seems very low for how little I've been using it.

    3G: Off all the time
    PUSH: Off all the time
    WIFI: On all the time
    FETCH: Hourly
    Brightness: 25%
    Autobrightness: On all the time.
    Bluetooth: On for about an hour
    Location Services: Off all the time

    I've sent maybe 20 test messages today and maybe 50 IM's over AIM. A little gaming and probably an hours worth of web surfing.

    I'm starting to think my battery is defective. What do you think?

    Thanks
     

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  2. benzslrpee macrumors 6502

    benzslrpee

    Joined:
    Jan 1, 2007
    #2
    i'm not sure if you're serious or not...but your battery appears to be fine.
     
  3. Opie macrumors 6502a

    Opie

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    Jun 17, 2008
  4. Cynicalone macrumors 68040

    Cynicalone

    Joined:
    Jul 9, 2008
    Location:
    Okie land
    #4
    That seems fine too me.

    I never have to charge during the day and I fetch my mail every 15 minutes. I don't really play game's much but I do a lot of texting and email. Probably the thing I do the least with my iPhone is make a phone call. :D
     
  5. donm3ga thread starter macrumors member

    Joined:
    Aug 19, 2008
    #5
    I'm not joking. I do think the my battery life is below average.

    When I take a look at the "Link a screenshot of your battery usage" thread, I see some crazy numbers when it comes to standby and usage.

    Does having WIFI on all day connected to a network drain your battery?

    When you get a battery replaced through Apple, am I out of a phone until they replace it? Or is it more like they take a battery out of the back and replace it?

    Thanks all.
     
  6. PoitNarf macrumors 65816

    PoitNarf

    Joined:
    May 28, 2007
    Location:
    Northern NJ
    #6
    I get similar usage from my iPhone at work. Push and WiFi are both on, barely use the iPhone and still by the end of the work day I'm about 1/2 down on the battery. Try shutting your WiFi off tomorrow just as a test to see how your battery holds up then.
     
  7. donm3ga thread starter macrumors member

    Joined:
    Aug 19, 2008
    #7
    Does auto brightness waste battery? If so is it a lot?
     
  8. donm3ga thread starter macrumors member

    Joined:
    Aug 19, 2008
    #8
    Here are my changes for today marked in RED.

    3G: Off all the time
    PUSH: Off all the time
    WIFI: Off all the time
    FETCH: Manual
    Brightness: 25%
    Autobrightness: Off all the time
    Bluetooth: On for about an hour
    Location Services: Off all the time

    Sent about 20 test messages and 30 IMs over AIM. Talked for a little over 30min on bluetooth and did a little bit of web surfing.

    Here are my results so far:
     

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  9. lakaiordie macrumors 65816

    Joined:
    Jun 17, 2008
    #9
    this is the most ive ever gotten

    this was on 2.0.1
     

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  10. andyblila macrumors 65816

    andyblila

    Joined:
    Jul 8, 2008
    Location:
    On My iPhone, or my iPad?
    #10
    Yes it does. You are using another transmitter so power is being used. I relayed in another post that I leave 3G, location services, and push on all day and I get 5 hours of usage and 17 hours of standby before I get the 20% warning. If you are connected to a Wifi network, you are exchanging data intermittently ie transmitting and receiving.
     
  11. heyp macrumors 6502

    Joined:
    Jan 29, 2008
    #11
    i did notice that wifi caused my usage to increase dramatically at night when the iphone was asleep... still not sure why it only happens with wifi and not with 3G enabled
     
  12. andyblila macrumors 65816

    andyblila

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    Jul 8, 2008
    Location:
    On My iPhone, or my iPad?
  13. donm3ga thread starter macrumors member

    Joined:
    Aug 19, 2008
    #13
    Roughly the same usage and time even added some 3G fun. Different day. Different settings. Different results. Find my settings on post #8.

    Conclusion: WIFI eats up your battery if you leave it connected all day. I knew this, but I didn't know it ate up that much.

    Left image is the original one in the original post. Right image is today's test.
     

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  14. Amorpheus macrumors member

    Joined:
    Jul 30, 2008
    #14
    Wi-Fi is not connected all day. Usually when I unlock my phone I see the GPRS or 3G symbol for a few seconds before it is replaced by the Wi-Fi indicator... and I just checked the router - the iPhone connects every 30min (my fetch setting) and is disconnected after ~30 seconds, I suppose that is simply some kind of idle timeout. In your case that would be maybe five minutes of connectivity. Even a full five minutes of downloading shouldn't make a noticable dent in battery life... kinda strange that your results do indicate that. Maybe Wi-Fi does stay connected in your case, can you check the icon?
     
  15. donm3ga thread starter macrumors member

    Joined:
    Aug 19, 2008
    #15
    Whenever I have wifi on it seems like it's always on. The wifi icon is always there. I have never seen it switch from icon to icon.
     
  16. superunlikely macrumors newbie

    Joined:
    Aug 27, 2008
    #16
    I see the exact same thing. My router's opinion is that the WiFi is disconnected about 30 seconds after the phone is locked.
     
  17. abnospam macrumors regular

    abnospam

    Joined:
    Jul 17, 2008
    #17
    locked? I thought it shut off in sleep? If it was locked, then people without PIN's would have wifi always on?
     
  18. abnospam macrumors regular

    abnospam

    Joined:
    Jul 17, 2008
    #18
    Get 25% More Battery

    so, I have found something that has given me about 25% more battery life.

    I had so many issues with Push/Exchange as it is simply buggy and get caught spinning or doesn't alert me when email come in that I switched to ActiveSync/Fetch. No real change in battery there.

    In an attempt to fix the continued bugginess with mail, I left Contacts/Cal on ActiveSync and moved my exchange email to an IMAP account and set it to OFF in the exchange account.

    Since then, my battery is about 25% better. I have no idea why. You would think fetch under activesync should be the same as fetch under IMAP, but it appears not to be the case.

    p.s. This has consistently given me 25% boost for about 5 days now.
     
  19. superunlikely macrumors newbie

    Joined:
    Aug 27, 2008
    #19
    Let me clarify: After I briefly push the sleep/wake button and the phone's screen turns off, then less than 30 seconds later my WiFi router removes the iPhone from its connected MAC list. When I tap the sleep/wake button (or home button) to wake it, I see the "E" icon (I have 3G disabled) and then the WiFi icon, and then the iPhone appears on my router's MAC list again.

    Whatever you want to call that... That's what I'm seeing. Is there any other way to lock it other than sleep or power cycle? I did not power the iPhone all the way down.

    I set password protect to off and it behaves the exact same way.
     
  20. donm3ga thread starter macrumors member

    Joined:
    Aug 19, 2008
    #20
    Where do I change the settings for this?
     
  21. Niiro13 macrumors 68000

    Joined:
    Feb 12, 2008
    Location:
    Illinois
    #21
    Actually, Wi-Fi and Push should be less battery drain than Wi-Fi and Fetch...

    I would presume so, since having auto brightness means that the sensor is on.
     
  22. donm3ga thread starter macrumors member

    Joined:
    Aug 19, 2008
    #22
    Kind of sucks that I have to turn off almost every feature on the new iPhone 3G just to get good battery life on it.

    I guess I just have to turn on whatever feature I need before I use it, and turn it off when I'm done.
     
  23. abnospam macrumors regular

    abnospam

    Joined:
    Jul 17, 2008
    #23
    Go into the advanced settings for your Exchange account and turn off Mail (leave calendar and contacts ON).

    Now add a new email account as other. Set it up as IMAP (most exchange servers you can use the same server name and login/pwd). My exchange is hosting so the server for imap access is different than exchange access, you will have to check with your IT or host if you have problems.

    I entered my user id and password on both the imap side and the smtp server (same server name). So it shows up as two accounts, but only one is getting email.
     

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