Develop Bugs

[Q] battery drain on gsm signal

hi all
recently i have just calibrate my battery.. and it works just fine
but now i found that it drains alot quicker using 3g signal compared to wifi...
the drain rate can take 10% /hour on 3g and only 4% / hour for wifi
why is that ?
is there something wrong on my gsm ?
btw am using leedroid froyo 2.0c and using latest radio 32.47.xxx
pls some one can tell me.. what to do ??any clues on this ?

3G has more power drain than wifi so it's normal.
Sent from my HTC Desire

elmalote said:
3G has more power drain than wifi so it's normal.
Sent from my HTC Desire
Click to expand...
Click to collapse
oiya ? is it ?
coz on my iphone it was different... wifi was worse..
anyway.. is there anyway to slower battery drain ?

interqd said:
oiya ? is it ?
coz on my iphone it was different... wifi was worse..
anyway.. is there anyway to slower battery drain ?
Click to expand...
Click to collapse
My 3G has always had higher power drain than WiFi. There isn't really anything you can do about it other than to turn it off. Alternatively you can disable "Always on Data" under Wireless & Networks => Mobile Networks

interqd said:
oiya ? is it ?
coz on my iphone it was different... wifi was worse..
anyway.. is there anyway to slower battery drain ?
Click to expand...
Click to collapse
Disable automatic sync. My data networks are switched off since last week. Now my battery lasts 2-3 days. I only use wifi at home.
You can also use juicedefender to control battery use and sync intervals.

interqd said:
hi all
recently i have just calibrate my battery.. and it works just fine
but now i found that it drains alot quicker using 3g signal compared to wifi...
the drain rate can take 10% /hour on 3g and only 4% / hour for wifi
why is that ?
is there something wrong on my gsm ?
btw am using leedroid froyo 2.0c and using latest radio 32.47.xxx
pls some one can tell me.. what to do ??any clues on this ?
Click to expand...
Click to collapse
This can also be caused by low/patchy 3G coverage in areas you are in.
If the 3G signal is weak then the handset will use a lot of power to try and keep the signal, as it prefers it over 2G.
If you don't mind the slower data speeds, switch to 2G/GSM Only as this does not use as much power (due to 3G cell breathing - Google it )

r2b2 said:
If the 3G signal is weak then the handset will use a lot of power to try and keep the signal, as it prefers it over 2G.
Click to expand...
Click to collapse
One way to alleviate *some* of that is to set the phone to "GSM Auto (PRL)".
Go to dialer and dial "*#*#INFO#*#*". That should take you to the settings screen.

r2b2 said:
This can also be caused by low/patchy 3G coverage in areas you are in.
If the 3G signal is weak then the handset will use a lot of power to try and keep the signal, as it prefers it over 2G.
If you don't mind the slower data speeds, switch to 2G/GSM Only as this does not use as much power (due to 3G cell breathing - Google it )
Click to expand...
Click to collapse
Definitely true. Your cell will consume much more power when you are outside of coverage area. The antena will keep searching the network according to your preference. So if you have 3G active all the time the phones internal antenna will keep looking for it and will drain your battery quicker.

okey..
thx all 4 d answers...
goo that to know there's nothing wrong with my signal or battery..
i think my problem is bad signal coverage.. as i always be in the shop which is so inside ....
but cant make it to edge/gsm as 2g speed is awful here in indonesia...
i think i'll just use juicedefender
thx..

Radio problems? Try this

I know there is a lot of talk about the radio issues the Nexus has been experiencing. My experience is a lot like many others. I would go do use my phone (data or text) which showed I had two or three bars of service. As soon as I tried to use maps or send a text I would loose all service and have to wait about two minutes before everything connected again and only then would I be able to data or voice. I had people telling me that they would try to call and get a fast busy signal.
For some reason my Nexus was dropping its signal entirely but I would still show bars, only after trying to use a signal would the phone realize that it was disconnected and reconnect to the network. Very very very frustrating.
For ****s and giggles I disabled LTE and switched to CDMA only. For two straight days I didn't have a single problem (except no 4g of course). Soon as I turn LTE back on I start dropping signal again. I think the phone has a problem with either keeping LTE active while sleeping or it can't gracefully do handoffs with LTE and CDMA.
On the other hand, If I run pandora and have LTE active I won't loose connection. I've tried this in a two hour car ride all around So Cal which supports the phone sleeping theory.
Anyway, if you're having the same issues try running CDMA only for a couple days and see if that helps.

I'm in. Switching now

I can't say anything to confirm or reject your findings because I have a GSM Galaxy Nexus. Is there no way to switch to CDMA when the screen is off/sleep mode and when the screen is active switch LTE on. That way background data and voice still work albeit at a slower connection but you never lose connectivity.
Just a theory, I assume that LTE switching off would be to save on battery life. I personally use Tasker to switch data off when screen is off and when it's on I set it to turn the data on too. I have seen a massive increase on battery when phone is idle and my standby is just short of around 1 week (tested when I had forgotten my charger and USB cable and deliberately didn't turn screen on to conserve battery life, had 8-9 phone calls during that period no issues)
Sent from my Galaxy Nexus using xda premium

I switched LTE off purely to stop my data from dropping.

First of all, thank you OP for posting this info
And this is exactly what VZW customer service people want us to do as one of the "solutions" to LTE drop. And I've been using this phone with 4G off due to the drop this entire time, but this is more like a remedy..
On the advertisements for Verizon GNex : "The fastest, most reliable network and the latest 4G LTE Galaxy Nexus Device comes to life!"
On the phone with VZW customer service after you purchase this phone eager to use 4G : The representative tells you... "Why don't you turn the LTE off, and just use it as CDMA?"
And we are thinking 1) where is the supposed update that was to come since 3 months ago?
2) We feel like we bought a Ferrari and the maker is telling us we shouldn't drive faster than 80mph.......If we go pass that speed, our engine is going to be shut off.
LOL...sad..

This works. My signal has been pretty stable since turning off LTE ... Battery life has increased as well ...
Now I'll try rooting my phone and installing a 4.0.4 radio and see how it goes...

This issue sounds like it may be addressed in the update rumored for next month. (Problems with data when the device sleeps.) Here's a quote from Droid Life.
Our friend, the Mobile Panda aka @black_man_x tossed out a quick, but important Tweet this afternoon that has to do with your Galaxy Nexus. As someone that has a well known insider track record when it comes to Verizon and LTE devices, we usually listen when he has something to spit out. Android “4.0.5″ and “April” is what he dropped today. According to Sir Panda, 4.0.5 is in testing and fixes “audio reboot issue as well as data falling asleep.” That should make you smile, right? April is a bit late seeing as the device was released in December, but what can you do?

sdmf91 said:
This issue sounds like it may be addressed in the update rumored for next month. (Problems with data when the device sleeps.) Here's a quote from Droid Life.
Our friend, the Mobile Panda aka @black_man_x tossed out a quick, but important Tweet this afternoon that has to do with your Galaxy Nexus. As someone that has a well known insider track record when it comes to Verizon and LTE devices, we usually listen when he has something to spit out. Android “4.0.5″ and “April” is what he dropped today. According to Sir Panda, 4.0.5 is in testing and fixes “audio reboot issue as well as data falling asleep.” That should make you smile, right? April is a bit late seeing as the device was released in December, but what can you do?
Click to expand...
Click to collapse
I remember going through the same thing when I got the Thunderbolt. There were all kinds of issues but eventually they all got worked out

bazzawhite said:
I can't say anything to confirm or reject your findings because I have a GSM Galaxy Nexus. Is there no way to switch to CDMA when the screen is off/sleep mode and when the screen is active switch LTE on. That way background data and voice still work albeit at a slower connection but you never lose connectivity.
Just a theory, I assume that LTE switching off would be to save on battery life. I personally use Tasker to switch data off when screen is off and when it's on I set it to turn the data on too. I have seen a massive increase on battery when phone is idle and my standby is just short of around 1 week (tested when I had forgotten my charger and USB cable and deliberately didn't turn screen on to conserve battery life, had 8-9 phone calls during that period no issues)
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
This particular issue isn't about saving battery life. It's about the cellular connection dropping out completely. Many users (myself included) have this happen several times a day. I can be in an area with a strong, full signal, and then all of a sudden my phone is searching for service. This happens far too often, and it happens both when I'm using the phone and when it's idle. Having LTE switch off when the phone is asleep isn't particularly useful for this issue because the connection drops when I'm trying to use the phone. I don't notice the connection dropping when the phone is idle unless I miss a call and get a voicemail later.
For me, I still randomly lose connectivity in CDMA only mode, although not nearly as frequently as when I have LTE on.

Prevent maps app from running all the time if you want to save battery. I use Gemini app manager from the market. I block maps from starting at boot and have seen significant battery life increases. App functions normally when ran too.

Sprint Network Issues

Anyone having issues in the Killeen/ Austin, TX area with network. I keep having issues today with dropped calls and text messages not going thru. I get Code 3: Network Problem errors. Anyone else? Thanks in advance. Also my TWS/ Cell Standby percentages have increased drastically. Now my TWS is at
55% and my cell standby is at 16% so my battery is draining fast.
Sent from my SPH-L710 using xda premium

MBM7881 said:
Anyone having issues in the Killeen/ Austin, TX area with network. I keep having issues today with dropped calls and text messages not going thru. I get Code 3: Network Problem errors. Anyone else? Thanks in advance. Also my TWS/ Cell Standby percentages have increased drastically. Now my TWS is at
55% and my cell standby is at 16% so my battery is draining fast.
Sent from my SPH-L710 using xda premium
Click to expand...
Click to collapse
If you are running stock for whatever reason the very recent LG8 update seems to have upped the ante on battery use for standby (my personal battery charge time has decreased as well because of this). As far as network problem I did have that happen once at around 1 or 2pm today, and the phone seemed to lock up on the lock screen for a bit, but then self recovered (with no battery removal / power cycle etc). Other than that I have had no issue in the Dallas, Texas area.

Battery life this bad??

Got my nexus 7 LTE on Thursday. Charged it 100% took it to work, and did almost nothing on it the whole day. By the time I got home it was at like 9% battery left. That is pretty horrible IMO. And again I did almost nothing. I didn't stream or watch videos. Just checked emails and some facebook. I don't remember my old nexus 7 wifi version being this bad. Is this normal with the LTE version? And if so if their anything I can do to get more time out of it...

If it's new return for replacement
Nam Huy Linux Blog namhuy.net

First of all, if you want our help try to give us more information, such as:
-Battery stats (App usage and Screen on-time) --> Example
-Current rom, OS version and kernel
-Tell us which battery saving methods are you using
-Wakelock Detector stats screenshot IMPORTANT!
After you're done with all these, we'll help you for sure.
Edit: If you haven't rooted/unlocked your device, just provide the OS version.

Never mind Figured it out....

What happened ? Please share
Nam Huy Linux Blog namhuy.net

I'm sure people are aware that LTE sucks battery life out of any mobile device faster than anything. If you put your mobile network in the settings, to 2G instead of LTE huge huge improvement. Its like its only the wifi version. And when you need to use the mobile network just change it back to LTE....

That's what I heard too, 4g, LTE.. Eats more battery than WiFi. I have WiFi version, you can even turn off WiFi when your screen is off, there is an option in settings.
Nam Huy Linux Blog namhuy.net

falcon26 said:
I'm sure people are aware that LTE sucks battery life out of any mobile device faster than anything. If you put your mobile network in the settings, to 2G instead of LTE huge huge improvement. Its like its only the wifi version. And when you need to use the mobile network just change it back to LTE....
Click to expand...
Click to collapse
It's more signal strength than LTE itself. LTE uses less battery than wifi on my Nexus 5 and Moto X, but I am in a very high signal strength area.

Adjust settings on Google play
Sent from my Nexus 7 using XDA Premium 4 mobile app

Need Help_battery drain on cell standby on C6502

I have C6502 on stock 5.02 with 10.6.A.0.454.
The thing is that cell stand by is far high of 37 percent of battery usage as attached.
C6502 won't last a full day, in fact it runs half a day only.
The battery draining started since soon after I changed telecom carrier to new one since this Sunday.
New SIM supports 3G data communication as well as LTE, even though C6502 doesn't support LTE.
I can call, send & receive sms, and access to internet via 3G.
The only problem is battery draining of cell stand by.
Does anyone have any advice or solution on it?