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Thread: Does leaving Bluetooth ON drain battery much?

  1. #1
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    Does leaving Bluetooth ON drain battery much?

    I was wondering how much battery drain does bluetooth do when it is left on all the time, but not connected?

    I only use bluetooth in my car and my sisters car and only a few times a week, but I like to leave it on, so that I do not forget to turn it on...just wondering how much drain it has on the battery when its not connected to anything? My guess would be minimal....TKS

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    I leave mine on all the time, since my car has bluetooth. It seems minimal to me, but I've not really turned it off. I take every opportunity to top up my battery as the Li-Ion batteries like to be charged and don't get a memory effect for half charges.

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    i see absolutely no difference on battery life when i have bt on all the time vs. enabling just when i turn on my headset

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    Very little if any.

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    Perfect...thanks everyone

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    I have to disagree. I notice a substantial drain unfortunately.

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    Very minimal when it's not connected. Almost enough not to bother...but with a few of the battery issues some are having, I'd turn it off.

    You also can't really "forget" to turn something on when you need to use it, either it's on or you'll notice it's not and turn it on.
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    Quote Originally Posted by oddsocks
    You also can't really "forget" to turn something on when you need to use it, either it's on or you'll notice it's not and turn it on.
    Its true, but in CA you cant use your phone w/o hands free...in my town even if you are looking like you are using your phone you'll get a ticket...so thats why I usually just perfer to leave it turned on and use it only when the car needs to connect.

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    I'm sure there's a shortcut key you can use to turn it on. I use timed profiles on my smartphone. I'm usually only at home or in a vehicle at a specific time for a specific amount of time, so I set up my calendar and schedule and then adjust profiles automatically based on schedule keywords.

    Not sure if anything like this exists for the iPhone though.

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    Quote Originally Posted by oddsocks
    I'm sure there's a shortcut key you can use to turn it on. I use timed profiles on my smartphone. I'm usually only at home or in a vehicle at a specific time for a specific amount of time, so I set up my calendar and schedule and then adjust profiles automatically based on schedule keywords.

    Not sure if anything like this exists for the iPhone though.

    Only if you are jailbroken. Otherwise, you must go through the normal procedure.

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    Leaving it on is not a problem. For example I get 1% per hour battery drain if there is no connection even with Exchange server connected etc. When connected I get about 4% per hour drain. Quite a difference.
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    Yea.. big difference between leaving bluetooth on and actually have connectivity with bluetooth.. Mine is on all the time as I use it only for my car wise, so it doesn't drain a lot of battery.. The only time it actually does connect is when I'm in the car..

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    Quote Originally Posted by joshieca
    I was wondering how much battery drain does bluetooth do when it is left on all the time, but not connected?

    I only use bluetooth in my car and my sisters car and only a few times a week, but I like to leave it on, so that I do not forget to turn it on...just wondering how much drain it has on the battery when its not connected to anything? My guess would be minimal....TKS
    i have always left my bt on, even on the iphone, no problems ever.
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    I usually leave wifi and BT on at all times and I dont notice much extra battery drain. The only one I regularly toggle on and off is 3G.

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    Bluetooth transferring drains battery but it does not make change to any battery usage when you keep it turned on. I think this is the only concept I have learned about this topic so far.

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