since I got my jasjar I I saw,sometimes, the battery was drained at 50% without using my jasjar in 3 or 4 hours. only one or two short phone calls. no msn running or any application. I have written a little C program that writes to a log file each 10 seconds the actual time(hour, minute and second) . ok, if there isn't 3g connection (of course, no programs running), and I turned off the device and when I turn on the device 5 minutes later I could see the CPU hasn't been running, so minimal battery drain. But if I do the same test but connected to UMTS (again no programs running, only the test program) I could see that my test program many times continues working many minutes, so cpu is working (i turned off the device), then it stops few seconfs, again It continues working....(the screen was turned off). so......be carefull if you turn off your jasjar with the umts connection active. while you think that your device is turned off and you are saving battery......its possible the cpu is running eating the battery.
and how do you disable UMTS and just leave GPRS on????
mmm, i simply disconnect the umts connection if i am going to turn off the device....
I have seen that my JASJAR is sporadically sending/receiving data in the background even if the applications are apparently inactive. This is causing the radio connection to stay up for a long time. Especially on Vodafone Spain UMTS network radio connections are kept for ~20seconds after the user data is sent.
The only application I had running was ActiveSync, with an update period of 5 minutes. However, within the 5 minutes I can see activity in the channel every 40 seconds approximately, even when ActiveSync has finished synching.
Anyone knows of any good packet sniffer for WM5.0 to identify exactly what that traffic is for?
As a consequence of what I think is background ActiveSync traffic, radio transmission is performed for a considerable amount of time (radio channel is active 33% of the time in my case), which drains battery extremely quickly.
This is related to this specific network implementation (all data sent on CELL_DCH mode, for those who understand UMTS RRM, though this is very likely to change in the near future), while other operators are using CELL_FACH, more similar to GPRS behaviour and more efficient in terms of battery usage. What network operator are you using?
If you want to avoid the UMTS network in order to maximise battery you can force the phone into GPRS only mode in Settings-->Phone-->Band and changing from Automatic to GSM... at the cost of not having video-calls, simultaneous voice+data or high download speeds.
Thank you y gracias !!!
If you want to avoid the UMTS network in order to maximise battery you can force the phone into GPRS only mode in Settings-->Phone-->Band and changing from Automatic to GSM... at the cost of not having video-calls, simultaneous voice+data or high download speeds.
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Click to collapse
I have done this and ive noticed i have alot better signal strength now,
really, before i could never get over 1 bar and often saw it was scanning to try and find a network, now im nearlly allways all bars,
I dont use UMTS so im well happy with this setup
Related
Hi,
My jasjas eats the battery. Today at 2 pm was at 100%. Now (9.50) is at 45%. I only have called one time (3 minutes). UMTS was connected, messenger connected, no wifi o bt connection. What is the problem?the battery?, UMTS enabled for a long time?, messenger?, some program?.
There's reduced standby and calling time wih UMTS.
I am finding the same.
Does anyone know of any way to tell the unit to disconnect UMTS after a set amount of time?
I cannot get a whole day out of my JasJar now, whereas I could get at least 4 out of my BlueAngel even when I was synchronising my email every 30 minutes over WiFi.
Thanks
JB
I am using GPRS/ EDGE. Sometimes when I have NOT used any Internet program, the G or E icon become a pure square G or E only without the 2 arrows. Does it mean it has DISCONNTED the GPRS/EDGE? Now if I launch IE and click a URL, the E/G icon will flashing with a moving 2 arrows and eventually after 1 or 2 seconds, become a "square E/G icon with fixed 2 arrows".
I am wondering, shouldn't the GPRS/EDGE be ALWAYS connected, such that the "G/E icon with fixed 2 arrows" should always appear? What setting I should change in order to make my Xda neo perform that way?
Hi isomania!
1) The icons are interpreted as follows:
Solid G/E - GRPS / EDGE network present, but not connected.
Small G/E with moving arrows - connecting to network.
Small G/E with solid arrows - connected.
2) There is no point to keep GPRS\EDGE connected when no programs are using it, since that would only shorten battery life. If I am not mistaken the timeout on the connection cannot be changed from the device side. I know push mail function sends some data (I think 400 bytes every 120 sec) to keep the connection alive, but it kills the battery and racks up the phone bill (unless you have unlimited data).
Thanks for your explanation. But for me, "connecting GPRS/EDGE" is STILL costing some time (may be 1 to 2 seconds). so i am wondering if I can keep GPRS/EDGE connected all the time I want, so that whenever I want to check POP3 email / go to any website, then I don't need to wait the 1 to 2 seconds connection time. Now THAT'S would be my definition of "always on"
One or two seconds to establish a connection? How will you ever manage having to wait that long? :roll:
isomaniac said:
Thanks for your explanation. But for me, "connecting GPRS/EDGE" is STILL costing some time (may be 1 to 2 seconds). so i am wondering if I can keep GPRS/EDGE connected all the time I want, so that whenever I want to check POP3 email / go to any website, then I don't need to wait the 1 to 2 seconds connection time. Now THAT'S would be my definition of "always on"
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Check the various tweaks n tips floating about, there's always a couple that will force gprs to remain on at all times. The downside isn't battery life, it barely affects that or push mail wouldn't exist. It's that eventually you will lose the signal, the connection will die and you won't notice the difference until you try to use it. Then you have to either toggle flight mode or reset the phone...after you figure out what happened. If you're constantly having to connect to gprs, you may be better served by looking for a disconnect timeout. With that, it'll get the occasional chance to reset the connection, making sure it's active. I have no idea what they are offhand and don't use them but I've come across them in the past so try a search and check the wiki.
The downside isn't battery life, it barely affects that or push mail wouldn't exist.
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Sorry, but I have to disagree.
Maybe if you manage to somehow keep the connection without transmitting anything (not sure this is possible) the battery drain will be minimal.
I am using push mail on my Jamin for only 3 days and the difference in battery drain is very noticeable. In fact even with no mail (I don't sync the rest) to transfer the battery life is cut almost in half.
I read an article where the same is reported for the universal.
i have a question about this related topic, i'm a noob, just got my mda on wed and i called them and added the data plan to my existing line, the guy said it would take about 72 hours for the browser to be surfing the web normally, well today is sunday and i still can't surf, my G icon on top is with arrows moving, and it shows i'm connected to EDGE but my browser only says Locating and never loads anything, please help?
Hi werkmeister47!
Arrows moving means GPRS is trying to connect, but not actually connected.
There are two possibilities:
1) The provider hasn't connected you yet (72 hours??? When I bought a SIM from Orange I was surfing in 5 minutes)
2) Your connection settings are incorrect. You have to contact technical support for exact settings for your network.
Good luck.
I have just set my mobile web connection to 'always on'. I've done this through the 'Advanced Config' app - GPRS auto attach: Enabled. Will this take more battery? I've read old posts for other phones, that claim this does kill battery but I've also found a post in this forum that says it doesnt! http://forum.xda-developers.com/showthread.php?t=546359
I have had endless trouble with my data connection - not being able to connect to internet, google maps, email etc and the only way to fix it was to either toggle airplane mode on and off or to actually soft reset. I'm hoping that having the GPRS auto attach will solve this trouble.
Any thoughts?
I'm doing experiments now with the battery life.
I charged phone to 100% and left in standby overnight with mobile web connection running. When I checked this morning, after 9 hours battery life was at 98% (received 1x sms and 1x email during the night).
Mobile web has now been connected for 17.5 hours and battery life is at 79%. 22mins device usage, mostly internet. No calls today and just the 1x sms and 1x email (Im not very popular - as is evident from the lack of replies to my post )
I will do the same experiment tonight with mobile web not connected.
Hi
It doesn't drain the battery. You have a permanent connection to the network anyway to receive phone calls. When you "attach" a data connection you're phone obtains an IP address and keeps it. To get an IP address requires an initial bit of talking to the cell and once it has it, that's it, it's doing nothing unless being actively used. If you disconnect all the time you will use more power as it costs power each time you have to negotiate for an IP address. Networks also prefer the connection to remain on as it cuts down on network traffic.
The only way your power is used more is if you have an application that is using the data connection continually.
Regards
Phil
Thanks PhilipL, exactly the answer i was hoping for as my connection seems a lot more stable since enabling auto attach.
Hi guys,
I have recently moved from symbian platform to WinMo. I do have a question regarding data connection. Does it ever auto disconnects? (for example in my old N95 if I clicked sync in my mail application, the phone would connect, download new mail and then auto disconnect when the job was done)
Also the phone would disconnect from data connection after closing app that was using it.
Now with my HD2 when I sync email, refresh weather etc the data connection stays on. Do I have to disconnect it manualy every single time so it doesnt drain my battery? It is very annoying since I have to do it manually very often.
Please advise... maybe I am missing something...
Cheers
Pete
Hi,
There's a few threads on here on data connection disconnection. There is also a hints & tips thread right at the top of this page.
Use this tool to find what you are looking for..http://www.google.com/advanced_search?q=+site:http://forum.xda-developers.com&hl=en&lr=&as_qdr=all
WB
install the 1 min disconnect tweak thats on this forum.
if you only set emails to check automatically it will disconnect ok using the above tweak but if you have weather and/or twitter apps connecting to update for some reason it will not close the connection at all i have told htc but never heard back
The only real reason for disconnecting a data connection is if you want to prevent unwanted costs associated with data exchange.
If you're in a weak signal area you can save battery by switching the connection band to GSM rather than 3G, but in a strong signal, 3G is more power efficient.
An open, but quiescent data connection has little or no effect on battery life as it's simply using the network infrastructure; battery usage only occurs during actual data exchange. So, if you turn off all the auto-update features and set email polling to a longer interval you should be OK. Kind of defeats the purpose of the device though
NeilM said:
The only real reason for disconnecting a data connection is if you want to prevent unwanted costs associated with data exchange.
If you're in a weak signal area you can save battery by switching the connection band to GSM rather than 3G, but in a strong signal, 3G is more power efficient.
An open, but quiescent data connection has little or no effect on battery life as it's simply using the network infrastructure; battery usage only occurs during actual data exchange. So, if you turn off all the auto-update features and set email polling to a longer interval you should be OK. Kind of defeats the purpose of the device though
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Click to collapse
From my experience all Symbian devices and the iPhone auto disconnect from the network once the data connection is no longer needed. They also reconnect in the blink of an eye. It kind of irritates me that Windows Mobile doesn't allow you at least the OPTION of doing so. It's particularly annoying if you're connected to a speaker and can't get 3g as there's a constant noise going off. I also think it can't be great for your balls having that connection constantly active! It's not HTC's fault though, just I think a result of Windows Mobile being inherently quite archaic...perhaps Windows have just overlooked it.
There's a great free app HERE to tweak the WinMo connections for individual apps. It's a must have for me.
petexx said:
Hi guys,
I have recently moved from symbian platform to WinMo. I do have a question regarding data connection. Does it ever auto disconnects? (for example in my old N95 if I clicked sync in my mail application, the phone would connect, download new mail and then auto disconnect when the job was done)
Also the phone would disconnect from data connection after closing app that was using it.
Now with my HD2 when I sync email, refresh weather etc the data connection stays on. Do I have to disconnect it manualy every single time so it doesnt drain my battery? It is very annoying since I have to do it manually very often.
Please advise... maybe I am missing something...
Cheers
Pete
Click to expand...
Click to collapse
This really isn't a problem, I've seen N95's that retain their connection at all time (and some that don't) and to be honest it just makes your handset a little quicker.
WMLongLife is the nuts. You need it.
Thanks for the link, I pay per minute on my connection (rather than data transferred) so an open connection is not good for my bank balance
Something strange since my upgrade to 1.66 - when the phone's in standby it appears to be establishing an active 3G connection, and when i wake (unlock) the phone, you can watch as it reconnects to the current wifi connection again. Is this some sort of energy saving strategy, which could theoretically run your 3G bill up? (dont matter to me as mine is unlimited, but not all are).
Anyone else notice/know about this?
By default, Wifi is disabled during standby to save power. So if a program requests an internet connection, for example outlook if you configured it to check mail automatically, the phone will connect the data connection.
You can search for "wifinostandby" to find a fix that disables auto wifi power off.
But beware that current consumption with wifi on is substantially higher than when it's off, by 10 times (current draw is about 50mA vs 5 for "true" standby), meaning you get at best 30h standby life if doing nothing else.
Also, dont forget that the top bar shows you the connetion being offered by your network, it doesn't necessarily mean it's doing anything. If you disable the wifif you see the same 3g icon regardless of what data is doing. So as said above, you go to standby, wifi is disabled so the wifi icon vanishes, then if you have your phone in 3g mode (personally mine stays in gsm mode, so i see an E not a H) when you wake it up it will display the H before the wifi kicks in and the icon changes back to wifi again.