Assisted GPS and battery life
in [UK Mobile]
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From: Garry Knight on 27 Apr 2010 20:30 My new mobile phone has assisted GPS. Does anyone know if using this feature will drain the battery faster than using standalone GPS? The phone is the LG GC900, if that makes a difference. -- Garry Knight garryknight(a)gmx.net
From: tim.... on 28 Apr 2010 12:33 "Garry Knight" <garryknight(a)gmx.net> wrote in message news:hr7vjl$90p$1(a)news.eternal-september.org... > My new mobile phone has assisted GPS. Does anyone know if using this > feature > will drain the battery faster than using standalone GPS? The phone is the > LG > GC900, if that makes a difference. It ought to use less. The theory with AGPS is that the GPS chip will be turned off when no GPS feature is in use and it is "assisted" to lock quicker when it is turned on. Of course, if the GPS feature (whatever it is) is turned on all the time it won't make any difference tim
From: Garry Knight on 29 Apr 2010 19:01 tim.... wrote: > > "Garry Knight" <garryknight(a)gmx.net> wrote in message > news:hr7vjl$90p$1(a)news.eternal-september.org... >> assisted GPS... >> will drain the battery faster than using standalone GPS? > > It ought to use less. That's what I would have thought and for the reasons you mentioned. > Of course, if the GPS feature (whatever it is) is turned on all the time > it won't make any difference I have no way of knowing that, unfortunately. The phone has a Google Maps app which, I assume, turns on the GPS when it fires up and turns it off when it closes. Unless the built-in GPS receiver *is* on all the time, which could explain the lowish battery life. The reason I'm asking all this is that I've been getting at least a day's use out of my battery most of the time, even with a fair bit of web browsing and email downloading. But a couple of days ago the battery almost went after an hour or so's browsing so I turned the phone off for the rest of the afternoon as I was out and about. The only difference I can think of is that I used Google Maps for a while. Of course, it could just be a dodgy battery... -- Garry Knight garryknight(a)gmx.net
From: rich on 15 May 2010 13:28 "Garry Knight" <garryknight(a)gmx.net> wrote in message news:hrd34q$k8$1(a)news.eternal-september.org... > tim.... wrote: > >> >> "Garry Knight" <garryknight(a)gmx.net> wrote in message >> news:hr7vjl$90p$1(a)news.eternal-september.org... >>> assisted GPS... >>> will drain the battery faster than using standalone GPS? >> >> It ought to use less. > > That's what I would have thought and for the reasons you mentioned. > >> Of course, if the GPS feature (whatever it is) is turned on all the time >> it won't make any difference > > I have no way of knowing that, unfortunately. The phone has a Google Maps > app which, I assume, turns on the GPS when it fires up and turns it off > when > it closes. Unless the built-in GPS receiver *is* on all the time, which > could explain the lowish battery life. > > The reason I'm asking all this is that I've been getting at least a day's > use out of my battery most of the time, even with a fair bit of web > browsing > and email downloading. But a couple of days ago the battery almost went > after an hour or so's browsing so I turned the phone off for the rest of > the > afternoon as I was out and about. The only difference I can think of is > that > I used Google Maps for a while. > > Of course, it could just be a dodgy battery... > > -- > Garry Knight > garryknight(a)gmx.net > AGPS will only be receiving metadata from the cell tower you're connected to- something your phone will be doing periodically irrespective of whatever you're doing. It usually is only a short data burst to 'assist' the GPS functionality to get an initial loose fix of your position. Things which kill a smartphone's battery will be the backlight (so having the maps enabled for a long time would do that), and any transmission function (in calls, wifi, bluetooth).
From: Garry Knight on 15 May 2010 15:52 rich wrote: > AGPS will only be receiving metadata from the cell tower you're connected > to- something your phone will be doing periodically irrespective of > whatever you're doing. It usually is only a short data burst to 'assist' > the GPS functionality to get an initial loose fix of your position. Things > which kill a smartphone's battery will be the backlight (so having the > maps enabled for a long time would do that), and any transmission function > (in calls, wifi, bluetooth). Ok, thanks for that. One thing I've found that kills the battery really fast is when there's no signal and the phone just keeps trying to get one. -- Garry Knight garryknight(a)gmx.net
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