Database Develop

CM7.1 cell standby costs 40% battery

Hey guys,
I flashed cm7.1 rc1, it's cool but I found the cell standby cost 40%, and phone idle also takes a lot of juice. My previous rom is arhd 1.10, on which the cell standby only takes 4%. I'm on the virgin's network in Canada. The virgin is acquired by Bell and of course it's using bell's network.
Is this network HSPA only? So in the *#*#4636#*#*, can I set the network mod as WCDMA only? Or by toggling 2G/3G to 3G only? Not sure if this will save some battery?

Switching to 2G only should save you a bit of battery. However, by far the best way to save battery is to switch mobile data off completely when you're not using it. I do this and my battery loses only 2 or 3% on standby overnight.

Switching to 2G wont work as Virgin Mobile/Bell does not have a 2G network backend like rogers or fido only 3G/4G so switching to 2g would make you have no service.

Yes. Virgin/Bell only use 1900MHz, the PCS band for their mobile communication, both voice and data.
In my opinion, use 3G only will save some power because the phone won't scan 2G frequency range. Moreover, setting the band as US band also will limit the scanning scope to save power. But after one day using, I didn't find much enhancement on battery life.

Ah, didn't know that. My apologies.

geeti said:
Yes. Virgin/Bell only use 1900MHz, the PCS band for their mobile communication, both voice and data.
In my opinion, use 3G only will save some power because the phone won't scan 2G frequency range. Moreover, setting the band as US band also will limit the scanning scope to save power. But after one day using, I didn't find much enhancement on battery life.
Click to expand...
Click to collapse
They act trully. Use 850/1900, bands ( for get the band number ) also if your in a area of low to no signal it kills battery becuase the phone is continues to serch for a signal almost as bad as call for battery. Also give you phone a week to calabrate your battery
Sent from my HTC Incredible S using XDA Premium App

if not just calibrate your battery I switched back to android revolution just cause i couldn't deal with the terrible camera app in cyanogen mod. And now display is back to my number one battery killer.

this is a "feature" of CM7.1, i found too

Yes, I also conclude this is a feature of AOSP.
I thought this battery use is a transient value for each process on battery draining, but now I found this is an accumulative statistics. The cell standby and phone idle's high usage make sense.
In the stock firmware, the fact that display always takes majority of the juice doesn't make sense actually, cuz the screen isn't always turned on.

[Q] Battery drains 5%+/hr standby on 3G

Hi guys,
I have a Nexus One purchased from Google last year. I only started using 3G this month with Vodafone Australia. My battery drains ridiculously fast on 3G compared to 2G. On HSDPA("3.5G") network with everything off (including data) it uses 5-10% per hour standby. On 2G it drains less than 1% per hour. Using a battery monitor app I can see that 2G draws less than 10mA while 3G draws 25-100mA.
Since on 2G battery life is very good this should not be a problem with any software running in the background. I also tried the following with no help:
- Dial *#*#4636#*#*, set to WCDMA only instead of WCDMA preferred, and select radio bands to AUS BANDS
- Upgrade radio to the latest Korean version
- Force the phone to use UMTS instead of HSDPA network by editing build.prop
I tried both the stock 2.3.4 ROM and the latest CM nightly, but the problem persists. I really want to take the full advantage of 3G and leave it on all the time so this is very frustrating to me. I can use Toggle2G to automatically switch to 3G when screen is on, but that's not what I really want. I know although 3G uses more battery it should not be that dramatic. After all the specified standby time on 3G/2G are 250/290h by Google. With 3G my phone won't last even a day purely on standby.
I also wonder if it can be a problem with the network. My signal strength on 3G is around 2 bars - not particularly bad. It almost never loses signal. If anyone can post a ROM/radio from Vodafone Australia for me to try out that would be greatly appreciated too.
Thanks all!

2 Bars of Signal strength might be one of the reason that battery is drained faster. As the signal is not that strong enough, it keeps searching for stronger signal and results in faster battery consumption.
Personally the radio version '5.12' wasn't satisfactory. I prefer 5.08 version. (Signal strength, speed, battery...)
I recently upgraded from CM 7.0.3 to 7.1.0 RC1 and noticed battery life is much better.
So I am going to suggest a few things you might want to try:
- Downgrade the radio to 5.08
- Full wipe and flash CM 7.1.0 RC1 (or a different custom ROM)
- Try a different kernel (I personally like Cyanogen kernel though)
- Uninstall Task Killer if you have one installed.

zephyr18 said:
2 Bars of Signal strength might be one of the reason that battery is drained faster. As the signal is not that strong enough, it keeps searching for stronger signal and results in faster battery consumption.
Personally the radio version '5.12' wasn't satisfactory. I prefer 5.08 version. (Signal strength, speed, battery...)
I recently upgraded from CM 7.0.3 to 7.1.0 RC1 and noticed battery life is much better.
So I am going to suggest a few things you might want to try:
- Downgrade the radio to 5.08
- Full wipe and flash CM 7.1.0 RC1 (or a different custom ROM)
- Try a different kernel (I personally like Cyanogen kernel though)
- Uninstall Task Killer if you have one installed.
Click to expand...
Click to collapse
Hi zephyr, I previously had CM 7.1.0 RC1 with radio 5.08 and the Cyanogen kernel but the problem remained. I also tried to put my phone near the window, where it has 4 bars signal, but the battery drained just as fast. Thanks for your suggestions though.

I know T-Mobile in the states screwed up something on their network a few weeks back. In doing so, it caused massive power usage on devices when using 3G/4G. I wonder if Vodaphone Australia did something to their network as well...
http://androidandme.com/2011/08/news/is-t-mobiles-network-killing-your-battery/

install current widget, and take logs of your current draw in mA during idle to see what's going on. do an overnight test, then during the day. post your logs.

So I just stumbled across this thread. I've been having the same issue on my Desire, it started suddenly a couple of weeks ago. In 3G mode my phone drains about 120mA. In 2g it drops down to 4-8. I've eliminated all the usual suspects by doing a factory reset (using the CM7.1.0RC but have also tried the latest nightly build), so no apps running in the background, and tried different versions of the radio. I am also with Vodafone in Australia. One thing that I have found is that if I go into Phone Info I can force the phone to make an EDGE connection by choosing the "AUS2" frequency band, and with an EDGE connection I get the good battery usage. But if I choose "AUS" or "AUTO", the phone makes an HSDPA connection and this drains the hell out of my battery.
Just wondering if the OP has had any joy with this?

stanleyguan said:
Hi guys,
I have a Nexus One purchased from Google last year. I only started using 3G this month with Vodafone Australia. My battery drains ridiculously fast on 3G compared to 2G. On HSDPA("3.5G") network with everything off (including data) it uses 5-10% per hour standby. On 2G it drains less than 1% per hour. Using a battery monitor app I can see that 2G draws less than 10mA while 3G draws 25-100mA.
Since on 2G battery life is very good this should not be a problem with any software running in the background. I also tried the following with no help:
- Dial *#*#4636#*#*, set to WCDMA only instead of WCDMA preferred, and select radio bands to AUS BANDS
- Upgrade radio to the latest Korean version
- Force the phone to use UMTS instead of HSDPA network by editing build.prop
I tried both the stock 2.3.4 ROM and the latest CM nightly, but the problem persists. I really want to take the full advantage of 3G and leave it on all the time so this is very frustrating to me. I can use Toggle2G to automatically switch to 3G when screen is on, but that's not what I really want. I know although 3G uses more battery it should not be that dramatic. After all the specified standby time on 3G/2G are 250/290h by Google. With 3G my phone won't last even a day purely on standby.
I also wonder if it can be a problem with the network. My signal strength on 3G is around 2 bars - not particularly bad. It almost never loses signal. If anyone can post a ROM/radio from Vodafone Australia for me to try out that would be greatly appreciated too.
Thanks all!
Click to expand...
Click to collapse
Try Juicedefender Ultimate, it shuts down data when not in use. I see 1-2%/hr max when used with a good kernel.

ctfrommn said:
Try Juicedefender Ultimate, it shuts down data when not in use. I see 1-2%/hr max when used with a good kernel.
Click to expand...
Click to collapse
Alas it's not the data, this happens even with the data turned off. It's something to do with the baseband connection.

It's not data here either.
This just started happening on my 100% stock unlocked N1 about 2 weeks ago. (ATT)
Most of the time at work I'm on WiFi, yes the signal (cell) is very bad in my office. Has been for a long time, something else is strange.
No extra tasks running, nothing new installed.
Gets piping hot when on the charger - sucks juice like crazy when off.
Checked data log - nothing unusual transmitting...

What sort of area do you operate your phone in? My phone used to drain like mad inside my house (perth- vodafone) and in areas with spotty coverage. In my house my reception would be on the very edge of 3g with no bars and EDGE, constantly switching between the two. Do you have your wifi policy set to on while sleeping? Provided you aren't out and about all day, that would help, though i assume if you've had the phone that long, youd have changed the wifi sleep policy by now.

My wifi is always on - never has changed.
It gets hot at home where there is good reception and at work where there is crap.
I've had the phone for over 1.5 years and this just cropped up.
I rooted my wifes N1 and she doesn't have any issues...

liam.lah said:
What sort of area do you operate your phone in? My phone used to drain like mad inside my house (perth- vodafone) and in areas with spotty coverage. In my house my reception would be on the very edge of 3g with no bars and EDGE, constantly switching between the two. Do you have your wifi policy set to on while sleeping? Provided you aren't out and about all day, that would help, though i assume if you've had the phone that long, youd have changed the wifi sleep policy by now.
Click to expand...
Click to collapse
I'm also in Perth, on Vodafone. I get a pretty decent signal strength at home, and it seems to be happening to me wherever I go, unless I'm "lucky" enough to get an EDGE connection. This started overnight, almost exactly two weeks ago. I've been speaking with Vodafone about this at length but not really getting anywhere. Yesterday they swapped my SIM but it didn't make any difference.
Yep, wifi is set to never sleep.
I bought a prepaid SIM card from another provider a few days ago. I only get a UMTS connection with them, but still the current drain when idle is what is considered "normal", 4-6mA.
One thought I've had is that maybe I never had an HSDPA connection before but recent network upgrades have meant that I'm suddenly getting one. Still, 125mA is way too big a drain and seems to indicate something wrong with the phone.
The last test I can think to do is to swap SIM cards with a friend who is on a third network, who gets an HSDPA connection. He has a Nexus One and gets very low current drain. At least that way I can be sure of whether it is or isn't the network. We're doing that tomorrow so stay tuned

(Q) CM7 wireless network question

So it gives me the options now, instead of global or cdma, of cdma, EvDo, or both. So myquestion is, what are they and what should I use. All of a sudden, after a couple days, I was having massive data loss and huge battery consumption when I switched over to both. But now I use evdo only, but what does each do, like, what should I have enabled to go back to the battery levels I was having before. Now I have 3g, but terrible battery life, before I had both. Help please!
P.S. sorry for not posting this in the dev section, I don't have enough post.
Sent from my DROID3 using XDA App

global should be GSM + CDMA. CDMA RTT is 1x (slow) and EvDO is 3G. Im not sure about the GSM portion of CM7, as I know there may be a patch or another version of CM7 for GSM. my D3 is running CM7 with CMDA + EvDO chosen and my battery is fine.

Okay. Thanks for the response. I don't know what was going on, it was getting hot, and my data was dropping. I'm going to let it charge back up, then leave it be. See how evdo+cdma works for a while. Thanks again!
Sent from my DROID3 using XDA App

also, if youre using safestrap, make sure youre running 1.06 (or higher if applicable)

I think I may have found the culprit. My display has always been first. Now all of a sudden, bad battery life, and high android OS numbers, anyone else smell something fishy?
Sent from my CM7 Droid 3

my advice is to make sure youre using 1.06 SS, and format /system, install CM7 11-16, wipe data/cache, and boot that beast up. my display is highest, android OS is at 13%. My battery is at 56% and ive flashed 3 times today since taking it off the charger at 630am

Im on the bootstrap from the market. I switched back to sd3, I gave up with it. But have either of you used both cm7 and sd3? Which did you find better for battery life? Also, SHOULD I BE USING EVDO+cdma or cdma only or evdo only. UGGGHHHH
Sent from my DROID3 using XDA App

probably use both cdma and edvo. ive used both SD3 and CM7 and Monster and DD and Liberty and Mavrom. And I flashed CM9 once lol. Ive had the best results with Monster previously, but now its CM7 as a clear winner in my book. the bootstrap from the market is missing several options. i would suggest reading up in the dev section, under safestrap. be careful or you'll have to sbf, but once in place, safestrap is the king of recovery

This is just getting weird now. I left it on cdma only, but disabled wifi over mobile network, and it went 3g. Then today, without touching any settings, it went to 1x bars and even toggling it wouldn't change it. But evdo is only 3g, no 1x bars. But both is 3g. I'm getting really confused now. Its like its only 3g when it wants to be on cdma.
Sent from my DROID3

I think everyone is confused on a few things. Lemme see if I can explain it a bit. CM7 doesn't have the same option in Wireless and Networks, so you push *#*#4636#*#* and choose Phone Info. Under there you can change the networks between GSM and CDMA types. GSM/CDMA means it searches for GSM signals off the SIM card and searches for CDMA signals as well. CDMA is the same as 1x and EVDO is the CDMA version of 3G. If you set it to EVDO only then it won't go to 1X unless you make a phone call and you won't receive any inbound calls or texts. This can be handy if you want a solid 3G connection without interruption from a text or phone call. 1x only is no 3G and if you get 3G it is a fluke. CDMA auto (PRL) is a combo of 3G(EVDO) and 1X which is normal Verizon usage.
Generally you want CDMA Auto because it disables any GSM signal and give you better battery life (disables GSM radio and uses less power). 1x or EVDO only are part of Verizon service but not standard.
I hope this makes sense and if I make a mistake please correct me. I didn't sleep well last night but I hope I clarified a few things.
If you are getting 3G when you set it to CDMA only then you need to report it to Hash as that is a bug.
Sent from my DROID3 using XDA App

[Q] Why does WCDMA(3g) use more power than GSM

I'm using Gingerbread 2.3.5 and the ZSJPG Baseband modem.
Using the phone in GSM mode with an Edge connection, the battery drains sometimes less than 1% an hour in standby, but if I switch to WCDMA mode with a HSDPA connection, the battery level drops dramatically and the phone struggles to last a day in standby.
When I switch mode, the phone doesn't normally get a HSDPA connection and still operates mostly on Edge due to a poor 3g signal.
Is this the reason for the battery drain, and does this mean that in a good 3g signal area, my battery life will be just as good as using the phone in GSM mode?
Thanks.

Battery drain on LTE

Has anyone noticed that the drain on the NOTE 4 is way worse on LTE than on wifi? i was experiencing this while leaving the phone on LTE last night, and i get good coverage where im at.
http://imgur.com/myZ2a1g

It is an issue with every phone because without wifi the phone will keep constantly trying to find the best LTE connection.