Battery drain: 2G vs. 3G - Hero, G2 Touch Q&A, Help & Troubleshooting

My carrier (Vodafone Czech) has just enabled HSDPA in it's network. I've heard it has larger battery drain than 2G which does not surprise me. But can someone tell me how large the difference is? And comparing it to Wi-Fi drain will be even better, since I know I can have my phone idle with Wi-Fi enabled for almost 3 days.

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[Q] Optimize 3G signal in Europe

Hello everyone!
I received my Vibrant from the US a week ago and noticed that when 3G is on, the reception is 1/2 bars at most. While it's connected, the device gets hot in the top part and the battery drains like a F1 racing car.
I though I could see how good is the signal and it's about (-90) - (-100) dbm.
I never had reception issues with my previous phone that is 3 years old (HTC Touch Cruise) whose reception is quite good. My company's antenna is about 1 Km far and it's emitting 3G in the WCDMA 2100 MHz band.
Could any setting improve the reception to avoid heating and battery consumption?
Thanks a lot!!
You may want to try to set it to 2G only if you want a good battery life.
Sent from my SGH-T959 using XDA App
Maybe somebody knows an application that switches from 3G to 2G when the reception is not good. It might be very handy.
Also, I wanted to know what levels are acceptable in dbm for a 3G connection that doesn't drain the battery like crazy.
Thanks for your reply!

WCDMA/3g only mode save xperia mini battery life

Hi everyone,
I dunno whether this have been posted, but I have discovered that, on the latest firmware 2.1.1.a.0.6 unrooted, when the phone set to wcdma/3g only the battery last so long.
After a day (24hrs) of standby and few sms, it has dropped to 75%.
Before I was on 2g/ both with wcdma preferable, 100% to 0% in 12 hrs only without doing anything.
could someone please try to see if it works the same for you.
Nope
because of different hardware and different software, i think it could be that.
i have used (before i jumped to android 2.3) 3G and it goes down too fast. this is the first time im seeing someone using 3G and saying it lasts more..! i have no idea!
I had to try locking the phone to 3G only just to test this, and now the phone goes from 100% to 75% in 11 hours. Not much difference from 3G/2G. 2G only is much better for battery life.
If your battery is zapped within 12 hours, you have some other problem.
after 3days6hrs, there is still 20% of juice left. few sms and about 20minutes of voice call during that period
incredible.
blackhawk1 said:
after 3days6hrs, there is still 20% of juice left. few sms and about 20minutes of voice call during that period
incredible.
Click to expand...
Click to collapse
The difference probably has to do with network coverage in your area. I think picking one protocol over the other and not having the phone check both bands save on battery.
In my area, there's plenty of 3G coverage, and setting to 3g only, on my MiniPro 2 has saved on battery.
I suspect if you're in a good 2g coverage area, with spotty or bad 3g, setting to 2g only is probably better.
Mike

Battery life 3G vs 2G

I have a stock Neo and found that battery life is nearly doubled when using 2G as cell standby use drops from 48-50% to 13-15% which I like.
I also have a -89 to -93dBm 10asu signal strength which believe is good.
But when on 2G there is no data connection, so does the Neo not have EDGE also is the phone faulty in respect to 3G data as I can only assume that is the cause of the poor battery.
2G normal uses less power, but if the 3G signal is stronger than the 2G one, I would use 3G as the phone has to use more transmit power to work with a weak signal.
John.
I've got working, but relativly slow 2g GPRS (EDGE?) data transmision. I hate 2g lags (much higher ping) and when it is possible I use 3g or wifi. Maybe your situation is caused by your mobile operator.
I asked the question on sony forum and it appears that all xperia have this problem of no or very poor 2G data connection whereas 3G is there but results in awfully poor battery life.
Just checked about mast location and I'm about approx 700m metres from the the mast.
I have just walked to the mast with the Galaxy W and Neo and both phone signal strength increased the same and at 100m they were -52dBm.
re op your comments still do not explain why the Galaxy W has twice the battery of the Neo when using 3G, my conclusion is that SE are rubbish at 3G.
From my walk I would also say that with a -70dBm that you are 200-300m from a mast, apart from the terraced houses (no high rise/flats ) it is level ground to the mast.
Just to add my phone on GSM only shows gprs not EDGE

[Q] Does Data drain battery faster ?

Does data connexion drain battery faster ? ( not on 3g, I mean only on 2g because i disable 3g, here in belgium there is only 2g+ so 3g is useless .. )
Thanks !
up No one know ?
Well.. Yes, of course it does.. You may want turn it off when you're not using data.
Yes it does. A constant 2G connection drains much more battery in standby than when it is off. You'll find your battery lasting longer with data turned off. WiFi uses far less power than mobile data.
Sent from my Desire HD using xda premium
According to what I've experienced with both my android phone (a SE Xperia X10) and my former maemo phone (Nokia N900) the power consumption while surfing the web on 3G is at least 3 times bigger than the consumption while in a wifi LAN.
I cannot say anything about 2G, because H3G in Italy has no 2G.

HSPA enabled/disabled battery life

I found how to disable hspa for the s2, since my carrier limit the speed for an infinite data plan (about 30kb/s, equal to the speed of umts)
but my question is, if i disable hspa do i get a better battery life?
Yes. Hspa is quite power hungry. If you're not seeing any benefit to having it switched on with your carrier, you will save some battery by switching it off.

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