1. FredBassett's Avatar
    there is no clear answer on this forum .. any ideas?
    01-17-2012 07:45 AM
  2. carter17's Avatar
    Wifi kills it faster from what I can see
    01-17-2012 07:52 AM
  3. josearmz10789's Avatar
    I've read on this forum that 3G uses 50% more energy than wifi.

    Sent from my SPH-D700 using Tapatalk
    01-17-2012 08:10 AM
  4. Paul627g's Avatar
    Best answer I have heard is WIFI is normally the better option. 2g/3g/4g is a constant up and down draw with signal strength and have always heard that this will pull more from the battery over a consistent WIFI connection.
    01-17-2012 08:37 AM
  5. andyberman's Avatar
    I researched the issue a while ago, and read that 3G/4G uses more power than WIFI.
    01-17-2012 11:40 AM
  6. jpp44345's Avatar
    there is no clear answer on this forum .. any ideas?
    It all depends on the signal strength. If you are in an area where 3G signal is good but a weak wifi signal, wifi will use more energy to remain connected. And also, if wifi signal is full and 3G signal is weak, using wifi will yield better battery life. If both signals are robust, then using wifi will effectively use less energy if you are using you phone actively. If you are a passive user who is not streaming media or chatting or anything else that needs you to be connected, then you should stick with 3g as the radio turns off after a few seconds non usage. Wifi on the other hand remains on. So effectively uses more battery for passive users. Hope that helps.
    WindRunner likes this.
    01-17-2012 04:49 PM
  7. KMBass's Avatar
    I don't know anything tecnical to tell you, but I can give you real life experiences. I got my RAZR on 12/31/11 and for the first week and a half I had it set to use 3G. By the end of the day I only had 30% to 40% battery. Last week I changed it ot use wi-fi wherever possible. Right now at 4:55 PM I still have 80% battery and I have used it all day for checking and replying to e-mails and I have noticed several app updates throughout the day.

    My daughter who uses her Droid 2 Global to play around on FaceBook and Twitter, for what seems like all day, also changed to wi-fi and she has 40-50% when she goes to bed where she was dying around 7-8 pm with 3G.

    For us, we are staying on wi-fi whenever we can.
    01-17-2012 04:57 PM
  8. n0obpr0's Avatar
    I use WiFi. 3G drains my battery faster
    01-17-2012 05:56 PM
  9. fatboy97's Avatar
    My own personal experience using Wifi and home and at work... then turning my wifi off, going with full LTE... then going to 3G only... so I've done it all testing different ROMs. I definitely think, and have seen, Wifi is the best on battery life no matter what ROM I'm running.
    01-17-2012 05:57 PM
  10. doogald's Avatar
    This question was answered by Android Central previously:

    http://www.androidcentral.com/keepin...-android-phone
    http://www.androidcentral.com/androi...ing-wifi-alive

    Or, from lifehacker:

    How to Get Better Battery Life from Your Android Phone

    Answer: WiFi consumes less battery than 3G.
    01-17-2012 06:05 PM
  11. Androidpwns's Avatar
    ummm, 3G
    01-17-2012 06:06 PM
  12. fatboy97's Avatar
    14.5 hrs on Wifi.... 77% battery life left... that is just today.
    01-17-2012 08:02 PM
  13. DarkTattoo's Avatar
    I have the Razr and I can tell you that WiFi is your best solution for battery hands down. 2G/3G/4G consumes alot more power. Plus, WiFi also helps with data if you you don't an an older unlimited plan(obviously). It is the best way to conserve for any smartphone period. I leave WiFi on in my house all day for all my phones( Razr,Thunderbolt, Galaxy Nexus and Galaxy S 2 ATT). This is a factt opinion and not speculation I hope this helps. Live It, Love It, Android-Life!
    01-17-2012 09:15 PM
  14. balthuszar's Avatar
    i get about 18 hours on 4G, havent tested 3G...but i accidentally left wi-fi on one day while i was at work...and it didnt even make it through the 8 hour day
    01-17-2012 11:49 PM
  15. ragnarokx's Avatar
    i get about 18 hours on 4G, havent tested 3G...but i accidentally left wi-fi on one day while i was at work...and it didnt even make it through the 8 hour day
    If you're not connected to WiFi and it's just searching for signal, then that will kill your battery faster.

    Sent from my Nexus S
    01-17-2012 11:56 PM
  16. IceDree's Avatar
    from my experience 3G kills it allot faster than Wi-Fi , But if your phone is just searching for Wi-Fi as Ragnarokx said it will kill the batter faster

    My Atrix can last up to 3 days with Wi-Fi on Stock battery , but allot less on 3G
    01-18-2012 04:28 AM
  17. trmoney24's Avatar
    i agree, wi-fi saves more power. i use "y5 battery saver" from the market which automatically turns on my wi-fi in places where i have connected to a wi-fi network. its greats cause it will turn off your w-fi automatically when you leave your wi-fi spot so your battery isn't waster searching for a signal.
    01-18-2012 08:56 AM
  18. Bzow's Avatar
    In my experience, WiFi is a lot better for battery life. I have my phone set up so that when WiFi is connected, my mobile data switches to 2G. I also have the sleep policy for WiFi set to "Never." Works incredibly well, assuming you have decent WiFi signal.
    01-18-2012 11:49 AM
  19. KoukiFC3S's Avatar
    Wifi uses less battery.

    Check out the Anandtech Razr review.

    AnandTech - Motorola Droid RAZR Review - A Better Clad Bionic

    They tested web browsing over 3G, 4G, and Wifi.

    3G: 4.417 hours
    4G:3.067 hours
    Wifi: 8.8 hours

    So wifi is a lot more power efficient.
    01-18-2012 01:09 PM
  20. skulldroid67's Avatar
    Wifi is a helluva a lot cheaper too.
    01-19-2012 07:14 AM
  21. dandil's Avatar
    All of the 3rd party people trying to pull data from your phone while it is on. Turn it all off; add most of your apps to the auto end list except the ones that have to be on like your music play if you are listing to music or Pandora while you are listing to music...when done add back to the auto end list. Things like GPS can be turned off. Turn it on when you need directions, then when you get there add it back to the auto end list. My data 3g is always on...at the end of the day I'm at 70%...in the evening I'm online reading stuff, bringing it down to 40%-50%. besides what I mentioned above, the screen being on drains most of your battery.
    01-23-2012 03:48 PM
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