Does Bluetooth 4.0 drain iphone battery?

Discussion in 'iPhone' started by TorontoSS, Aug 4, 2017.

  1. TorontoSS macrumors 6502

    Nov 9, 2009
    Hi - I recently bought some headphones (which I love, Sennheiser Momentums). I have noted before I bought these, that the battery on my phone has been going down a lot.

    But I've noticed it even more lately. I'm not sure if it's using Bluetooth which does it. I have an apple watch and the Bluetooth doesn't drain as fast with that. Could it be the combo of streaming from Apple Music and the headphones using 4.0 Bluetooth?

    Does BT 4.0 drain faster than 4.1?
  2. BigMcGuire Contributor


    Jan 10, 2012
    I use BT 4.1 with a pair of LG HBS-760 - doesn't seem to drain noticeably faster. I mean, sure, it's going down faster than if it just sat there without use but it's not terrible. I use Google Music.

    How old is the phone? Most phone batteries will start to degrade noticeably after a few hundred charge cycles.
  3. TorontoSS thread starter macrumors 6502

    Nov 9, 2009
    Thanks for your reply. From my understanding (through google searches, I really don't know much about this), BT 4.1 works with 4G a lot better and therefore less drain. Whether it is noticeable is what I'm trying to figure out.

    My phone is not very old which is why it's weird. I have an iPhone 7 which I think I bought in October or November. So it shouldn't have that many charge cycles on it.

  4. noobinator macrumors 603


    Jun 19, 2009
    Pasadena, CA
    Are you streaming when using these BT headphones? Streaming will cause your battery to drop faster than having 20 BT devices connected.
  5. Newtons Apple Suspended

    Newtons Apple

    Mar 12, 2014
    Jacksonville, Florida
    My BT has been on from the introduction day of the 7+. It uses very little power when not in use. Not really worth turning off for me.
  6. Jimmy James macrumors 601

    Jimmy James

    Oct 26, 2008
    Nope. It's self sustaining. Like cold fusion.
  7. TorontoSS thread starter macrumors 6502

    Nov 9, 2009
    Thanks - I don't understand what's causing my battery drain issue then. About 36% of the days issue is Apple Music however. I am streaming yes, HOWEVER, I haven't streamed for about 4 hours and it still is draining. The usage time and standby time are the same. Hmmm
  8. TheRealAlex macrumors 68000

    Sep 2, 2015

    Its usually Find My iPhone and iCloud constantly trying to UpLoad Data in the background or worse using GPS all the time to update the phones location. If those 2 are off then Take it to the Apple store for a free Diagnostic sounds the Lithium Ion battery chemistry is bad these batteries are fragile and chemically degrade even under perfect conditions.
  9. TorontoSS thread starter macrumors 6502

    Nov 9, 2009


    I think I'll take it in and figure out the issue!
  10. Vanilla35 macrumors 68040


    Apr 11, 2013
    Washington D.C.
    The only way to definitely answer your question is to try streaming from your phone for some time with wired headphones, and then repeat it with bluetooth. Bluetooth definitely uses more battery than the aux would, which is to say, no extra battery drain.

    Differences between 4.0 and 4.1 should not be causing drain.

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