Bluetooth and battery life

On my Motorola v525 I can turn my Bluetooth link on and off fairly easily.

If I know I'm not going to be using it for a couple of days, would it make
sense to turn it off? If I keep it on, will it drain the battery quicker?

TIA
--
Slartibartfast
To reply by email, remove the FJORDS from my address

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"Slartibartfast" <[email protected]> wrote in message
news:[email protected]...
> On my Motorola v525 I can turn my Bluetooth link on and off fairly easily.
>
> If I know I'm not going to be using it for a couple of days, would it make
> sense to turn it off? If I keep it on, will it drain the battery quicker?
>
> TIA
> --
> Slartibartfast
> To reply by email, remove the FJORDS from my address
>
I tried leaving on and off but didn't notice any difference so I leave mine
on 24/7 now.

"Slartibartfast" <[email protected]> wrote in message
news:[email protected]...
> On my Motorola v525 I can turn my Bluetooth link on and off fairly easily.
>
> If I know I'm not going to be using it for a couple of days, would it make
> sense to turn it off? If I keep it on, will it drain the battery quicker?
>
> TIA
> --
> Slartibartfast
> To reply by email, remove the FJORDS from my address
>
I tried leaving on and off but didn't notice any difference so I leave mine
on 24/7 now.

"Slartibartfast" <[email protected]> wrote in message
news:[email protected]...
> On my Motorola v525 I can turn my Bluetooth link on and off fairly easily.
>
> If I know I'm not going to be using it for a couple of days, would it make
> sense to turn it off? If I keep it on, will it drain the battery quicker?

On my T68i if I leave Bluetooth turned on it reduces standby time by about
25%. But as that simply means it drops from ~8 days to ~6 days then that is
not much of an issue. But there is the reported risk of Bluejacking so in
some respects it's better to turn it off if not needed.

I don't have a headset but I do sync with Bluetooth. I have a shortcut to
the Bluetooth options and simply set the phone to "discoverable" for three
minutes when I want to sync and that suits perfectly.

"Slartibartfast" <[email protected]> wrote in message
news:[email protected]...
> On my Motorola v525 I can turn my Bluetooth link on and off fairly easily.
>
> If I know I'm not going to be using it for a couple of days, would it make
> sense to turn it off? If I keep it on, will it drain the battery quicker?

On my T68i if I leave Bluetooth turned on it reduces standby time by about
25%. But as that simply means it drops from ~8 days to ~6 days then that is
not much of an issue. But there is the reported risk of Bluejacking so in
some respects it's better to turn it off if not needed.

I don't have a headset but I do sync with Bluetooth. I have a shortcut to
the Bluetooth options and simply set the phone to "discoverable" for three
minutes when I want to sync and that suits perfectly.

"Slartibartfast" <[email protected]> wrote in message
news:[email protected]...
> On my Motorola v525 I can turn my Bluetooth link on and off fairly easily.
>
> If I know I'm not going to be using it for a couple of days, would it make
> sense to turn it off? If I keep it on, will it drain the battery quicker?
>
> TIA
> --
> Slartibartfast
> To reply by email, remove the FJORDS from my address
>

BT does allegedly drain batteries faster. However I had a T68i and left it
on all the time without problems and my V600 has it on all the time and I
get at least 3 days use before battery drops. So on that basis it is not a
problem.

Try leaving it on and see how you get on.

"Slartibartfast" <[email protected]> wrote in message
news:[email protected]...
> On my Motorola v525 I can turn my Bluetooth link on and off fairly easily.
>
> If I know I'm not going to be using it for a couple of days, would it make
> sense to turn it off? If I keep it on, will it drain the battery quicker?
>
> TIA
> --
> Slartibartfast
> To reply by email, remove the FJORDS from my address
>

BT does allegedly drain batteries faster. However I had a T68i and left it
on all the time without problems and my V600 has it on all the time and I
get at least 3 days use before battery drops. So on that basis it is not a
problem.

Try leaving it on and see how you get on.

In article <[email protected]>,
"Slartibartfast" <[email protected]> wrote:

> On my Motorola v525 I can turn my Bluetooth link on and off fairly easily.
>
> If I know I'm not going to be using it for a couple of days, would it make
> sense to turn it off? If I keep it on, will it drain the battery quicker?

Yes, and yes

In article <[email protected]>,
"Slartibartfast" <[email protected]> wrote:

> On my Motorola v525 I can turn my Bluetooth link on and off fairly easily.
>
> If I know I'm not going to be using it for a couple of days, would it make
> sense to turn it off? If I keep it on, will it drain the battery quicker?

Yes, and yes

Slartibartfast wrote:
> On my Motorola v525 I can turn my Bluetooth link on and off fairly easily.
>
> If I know I'm not going to be using it for a couple of days, would it make
> sense to turn it off? If I keep it on, will it drain the battery quicker?
>
> TIA
It depends how you define ON.

There are obviously a few extra modes apart from *connected* where the radio will be used.

Actively looking for devices (inquiring) and Actively trying to connect to a particlar
device (paging) will use some radio power but a phone should never really do this apart
from the first time you pair a set of devices.

After your devices have been paired you should rarely do any inquiring.

listening for other searching devices (inquiry scanning) is sometimes referred to as
discoverable.

To save power should turn this off.

listening for other devices trying to connect (page scanning) is sometimes referred to as
connectable.

This should remain on if you wish to connect to your paired devices quickly.

So to recap, if you have paired your devices and they are unconnected but remain
connectable the radio is doing very little.

A good implementation of bluetooth device will put the tranceiver circuits into sleep
during the time slots where it is not used. The rest of the Bluetooth chip will use
interrupts to sense data being thrown at it so the only thing running is the chip and some
oscillators

compare this to your colour LCD screen, your GSM radio circuits and your polyphonic
ringtone system, the bluetooth power consumption is pretty much negligable.

i've noticed No decrease in battery life, even on my older phone with degraded battery.

HTH

Rob Shepherd

Slartibartfast wrote:
> On my Motorola v525 I can turn my Bluetooth link on and off fairly easily.
>
> If I know I'm not going to be using it for a couple of days, would it make
> sense to turn it off? If I keep it on, will it drain the battery quicker?
>
> TIA
It depends how you define ON.

There are obviously a few extra modes apart from *connected* where the radio will be used.

Actively looking for devices (inquiring) and Actively trying to connect to a particlar
device (paging) will use some radio power but a phone should never really do this apart
from the first time you pair a set of devices.

After your devices have been paired you should rarely do any inquiring.

listening for other searching devices (inquiry scanning) is sometimes referred to as
discoverable.

To save power should turn this off.

listening for other devices trying to connect (page scanning) is sometimes referred to as
connectable.

This should remain on if you wish to connect to your paired devices quickly.

So to recap, if you have paired your devices and they are unconnected but remain
connectable the radio is doing very little.

A good implementation of bluetooth device will put the tranceiver circuits into sleep
during the time slots where it is not used. The rest of the Bluetooth chip will use
interrupts to sense data being thrown at it so the only thing running is the chip and some
oscillators

compare this to your colour LCD screen, your GSM radio circuits and your polyphonic
ringtone system, the bluetooth power consumption is pretty much negligable.

i've noticed No decrease in battery life, even on my older phone with degraded battery.

HTH

Rob Shepherd

"Slartibartfast" <[email protected]> wrote in message
news:[email protected]...
> On my Motorola v525 I can turn my Bluetooth link on and off fairly easily.
>
> If I know I'm not going to be using it for a couple of days, would it make
> sense to turn it off? If I keep it on, will it drain the battery quicker?

My V600 BT is on all the time,and last a week or more before I charge it, my
T39 has a 1 day battery life if BT is on, however I think the 2 systems are
slighty different hence the better connectivity of the eric.>
> TIA
> --
> Slartibartfast
> To reply by email, remove the FJORDS from my address
>
>

"Slartibartfast" <[email protected]> wrote in message
news:[email protected]...
> On my Motorola v525 I can turn my Bluetooth link on and off fairly easily.
>
> If I know I'm not going to be using it for a couple of days, would it make
> sense to turn it off? If I keep it on, will it drain the battery quicker?

My V600 BT is on all the time,and last a week or more before I charge it, my
T39 has a 1 day battery life if BT is on, however I think the 2 systems are
slighty different hence the better connectivity of the eric.>
> TIA
> --
> Slartibartfast
> To reply by email, remove the FJORDS from my address
>
>

The brilliant blue flashing searchlight is annoying at night
though isnt it!

> On my T68i if I leave Bluetooth turned on it reduces standby time by about

The brilliant blue flashing searchlight is annoying at night
though isnt it!

> On my T68i if I leave Bluetooth turned on it reduces standby time by about