Okay here is a question!

[Tom Norton]

We are currently cycling across Europe. I use Osmand at different times during the day while my wife has a Garmin on her bike.
If I leave Osmand loaded and turn the screen off,not turning off the phone, will it still drain the battery?
Thanks!

[Helmut Jarausch]

Yes of course. It has to process the GPS signal and update its position.

But, on any smartphone the screen consumes much more battery. 

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[Tom Norton]

As a"tech challenged" individual I thank you for your reply! So just because the screen is off the GPS is still at work and the app needs to be closed for the GPS to be off.

[Pere Pujal i Carabantes]

Note that everything the phone does drains battery, more or less.
You could see the battery usage per app in the configuration settings of the battery, then with some common sense and some try/error you could try to improve your battery life by disabling some apps or services that you don't need just now and reenable later when you need them.

Best
Pere

El 14 de juliol de 2019 7:27:28 CEST, Tom Norton <tnort...@gmail.com> ha escrit:

As a"tech challenged" individual I thank you for your reply! So just because the screen is off the GPS is still at work and the app needs to be closed for the GPS to be off.

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[P Wat]

> Tom

I agree with Per Pujal.

If you turn off all unwanted aps, and BlueTooth and Wifi, and particularly turn off the screen, you may me able to run GPS and Osmand all day.  I achieved it last summer during a 14-day cycle tour, albeit I was using the (then available) automatic-screen-On/Off facility.

Good luck

Paul W

[Harry van der Wolf]

Op zo 14 jul. 2019 om 10:21 schreef 'P Wat' via Osmand <osm...@googlegroups.com>:

> Tom

I agree with Per Pujal.

If you turn off all unwanted aps, and BlueTooth and Wifi, and particularly turn off the screen, you may me able to run GPS and Osmand all day.  I achieved it last summer during a 14-day cycle tour, albeit I was using the (then available) automatic-screen-On/Off facility.

The automatic screen on/off is in the 3.4.2 which is now in the beta-channel for which you can register. I assume it will be available quite soon in the normal play store.

Otherwise you can directly download it from https://download.osmand.net/releases/ (but I think that is the free version).

And why not use a simple power bank? The smaller ones are just the size of a phone with normally 1.5~2 timesthe load your phone battery has. Connect it when your phone is below 30% and you can last quite some more hours.

[Xavier]

On Sat, Jul 13, 2019 at 10:33:33AM -0700, Tom Norton wrote:
>If I leave Osmand loaded and turn the screen off,not turning off the
> phone, will it still drain the battery?

Unless you turn off the phone (i.e., "shutdown") the battery is being
drained. [1] What changes is the amount of drain that occurs.

Maximum drain occurs when everything is on (all radios, all sensors,
screen on and at maximum brightness, CPU doing something that requires
full power).

Minimum drain occurs when most things are off. Screen off is a big
power saver (because in most phones the screen is often the single
largest power consuming element).

Actual usage occurs somewhere in the middle (some things are on, others
off).

If you are interested in extending battery life between charges, then
turning off elements you do not at present need can save power. I.e.,
if you are not using bluetooth, then switch it off. That tells the OS
not to wake the hardware up to even look for other bluetooth devices,
saving the power that would be consumed. If you are not using wifi,
turn it off also (prevents scanning for access points to connect with).
If you don't need cell service, turn that off (turning this off is
called 'airplane mode', which also turns off wifi and bluetooth, but
both of those can be turned back on separately).

And, of course, keeping the screen off (or on the dimmer settings) as
much as possible will save a lot of battery.

But anything you have the phone doing (playing music, running OsmAnd
for routing, monitoring a bluetooth dongle, etc.) will consume some
power. The more of those you have it doing at the same time, the more
total power consumed.


[1] And, if you really want to get into low-level battery chemistry,
even then it is "being drained", just so slowly that you are unlikely
to notice over typical phone usage timescales.

[Gavin Meredith]

I use Osmand for turn-by-turn instructions when cycling. Every now and again I turn on the screen. Does Osmand use less battery in night mode ( with its darker colours)

[Helmut Jarausch]

Yes, especially on devices using organic LED displays like Samsung devices. 

Gavin Meredith <gam.me...@gmail.com> schrieb am So., 14. Juli 2019, 16:59:

I use Osmand for turn-by-turn instructions when cycling. Every now and again I turn on the screen. Does Osmand use less battery in night mode ( with its darker colours)

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[Gavin Meredith]

I find that using a Brouter app generated route with turn by turn instructions one gets a lot of commands many of which are unnecessary. That cant do the battery life any good.

[Ken]

I occasionally use Osmand for hiking and was originally staggered by the battery drain even screen off. However I didn't use it to navigate, just to check my position now and then. I discovered that returning to the home screen before turning the screen off made a major reduction in power use. Returning to Osmand again later it would quickly satellite lock and show my new position.

In this mode of course it will not announce turns because Osmand is dormant, but can show progress along a calculated route which has not yet been started.

Hope this is of some use.