Develop Bugs

[Q] WiFi Mobile Hotspot not easy on the battery

Well, I finally tried out my Mobile Hotspot service I subscribe to from Verizon. I will admit that the speed from the 4G LTE is nice on both my laptop and Transformer Prime. However, the battery life on the Nexus really took a nose dive after using this service with my Prime for about 1hr yesterday during a meeting.
Does anyone have some tips on conserving the battery during this type of use?

about how many hours can u get with wifi hotspot on?
i can get about 3-4hr on my nexus one with constant use... if its on but idling the phone can last 6-8hr
thats not using phone, just the wifi device tethered to the nexus one

mush03 said:
about how many hours can u get with wifi hotspot on?
i can get about 3-4hr on my nexus one with constant use... if its on but idling the phone can last 6-8hr
thats not using phone, just the wifi device tethered to the nexus one
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Idling i get about 3-4 hrs....so i am thinking something has got to be wrong.

[Q] Constantly in a bad reception zone

When I'm at school (5 days a week) most of my classes are in a building where I do not get a lot of reception, aka, my battery gets killed by the phone to keep up the signal. I do get reception, around 1-2 bars, but that still drains the battery extremely fast. Is there any app or something that I can do to help reduce the amount of battery drain?
I don't want to put the phone into air plane mode because I can still send and receive text messages, but it's just very slow.

Have you tried putting it in cdma only mode?
Sent from my Galaxy Nexus using XDA

You could save a lot of battery life by either connecting to a wifi hotspot (if available) or by turning off background data. The problem your phones having is that it has to turn the gain way up on its cellular radio in order to transmit and receive data. By reducing the amount of background data usage (or off loading it to another network with better signal--i.e. wifi) you'll save a lot of juice.
If you can't do either, there are some things you can do with Tasker to reduce data usage to windows of time instead of always on. May be something to consider.
- chris

isinisterx said:
When I'm at school (5 days a week) most of my classes are in a building where I do not get a lot of reception, aka, my battery gets killed by the phone to keep up the signal. I do get reception, around 1-2 bars, but that still drains the battery extremely fast. Is there any app or something that I can do to help reduce the amount of battery drain?
I don't want to put the phone into air plane mode because I can still send and receive text messages, but it's just very slow.
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Drop it into 2G only or connect to WiFi.
taappel said:
Have you tried putting it in cdma only mode?
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He's in Canada, so using the GSM model.

Give juice defender a try. It used to almost double the battery life on my old X10 when I worked in a building that I could only get 1 bar at best.
Sent from my Galaxy Nexus using xda premium

GreatBigDog said:
Give juice defender a try. It used to almost double the battery life on my old X10 when I worked in a building that I could only get 1 bar at best.
Sent from my Galaxy Nexus using xda premium
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JD sucks on the Nexus, unless it has gotten an update since last month.. WiFi doesn't want to reconnect. I've seen others say the same thing.

WiredPirate said:
JD sucks on the Nexus, unless it has gotten an update since last month.. WiFi doesn't want to reconnect. I've seen others say the same thing.
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yessss someone else with the wifi problem.when in like a perfect wifi signal zone, my friends gnex connect oerfectly and mine just says saved, wont connect to the networj
Sent from my Galaxy Nexus using xda premium

Battery life without data on?

Hello there I'm looking for a reasonably priced unlocked Android phone to take abroad with me this coming fall. I won't be using data services so that being said, how long would the battery be expected to last with moderate to high usage? (good bit of texting, some calls/pictures, and some wifi Web browsing). Thanks! Searched around and couldn't find this bit of information.
Sent from my SPH-D710 using Tapatalk 2

How are you expecting to make calls? If you literally only have a voice-only SIM when you're there and you'll be using the phone heavily on WiFi, the battery life won't be drastically better than if you were on mobile data. The screen is the largest drain on the phone, and if you're still using data over WiFi you'll maybe get to 2 days of usage on a stock phone.
Sent from my Galaxy Nexus using xda premium

martonikaj said:
How are you expecting to make calls? If you literally only have a voice-only SIM when you're there and you'll be using the phone heavily on WiFi, the battery life won't be drastically better than if you were on mobile data. The screen is the largest drain on the phone, and if you're still using data over WiFi you'll maybe get to 2 days of usage on a stock phone.
Sent from my Galaxy Nexus using xda premium
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There's an option in settings to turn off data. You still get voice, you don't need to turn on airplane mode or get a voice-only sim.
But I agree, battery won't be drastically better, I have data turned off and my batt times have been similar to the average times posted here

harveydent said:
There's an option in settings to turn off data. You still get voice, you don't need to turn on airplane mode or get a voice-only sim.
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Yes I know you can turn off data . I asked how he intends to make calls because if he will actually have a SIM in and connecting to towers for calls, battery life will not be drastically better than if he had data turned on. If, however, he was making VOIP calls over WiFi with airplane mode on, he'd likely see a large improvement in battery life.
Sent from my Galaxy Nexus using xda premium

Yeah I realize keeping the antenna on will consume battery...I would probably be surfing the Web on wifi for 30 minutes to an hour max each day. Should I look at getting the extended battery? As long as I can get a full day (18-24 hours) with moderate to high usage I'm fine.
Sent from my SPH-D710 using Tapatalk 2

[Q] WiFi stays on even in sleep mode!!!

So my stock JB 4.1.1 GSM Nexus is having some issues regarding the wifi, specifically the sleep policy. I have it set to turn off when the phone is sleeping but whenever I go to look at my battery consumption, it shows the wifi as being active all day long. Has anyone else experienced this/ can you reccomend a fix? Thanks!

Same problem here; wifi is always on for me on stock 4.1.1. Anyone have advice?
Sent from my Galaxy Nexus using Tapatalk 2

Not sure why you'd want to turn WiFi off when the screen is off?
But yes, the "advanced" settings on WiFi are a bit finnicky for people. I've noticed that they don't always stick. Just gotta try toggling it a few times over and over.

martonikaj said:
Not sure why you'd want to turn WiFi off when the screen is off?
Click to expand...
Click to collapse
To save battery.
martonikaj said:
But yes, the "advanced" settings on WiFi are a bit finnicky for people. I've noticed that they don't always stick. Just gotta try toggling it a few times over and over.
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Thanks, I'll try this

pinke123 said:
To save battery.
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You think wifi consumes more juice than cellular radios do? or do you shut those down as well?

animal24 said:
You think wifi consumes more juice than cellular radios do? or do you shut those down as well?
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I know it does because my battery lasts longer when I manually shut off wifi.

Wifi will never consume more battery than the cellular radio.
Sent from my Galaxy Nexus using XDA Premium via Verizon Wireless

Wifi consumes more battery idling. 3g consumes more battery surfing.
Sent from my Galaxy Nexus using Tapatalk 2

pinke123 said:
I know it does because my battery lasts longer when I manually shut off wifi.
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Over a whole day's use, if you're on WiFi the whole time you'll use less battery then if you're on the mobile network. The idle battery use is higher but your time connected to transfer data (and therefore battery used) is much much lower.

idling in 2g saves allot more battery than Wi-Fi

Turning off the phone is the best battery saver. But everyone knows wifi is the best option if you have it. 3g runs your battery down way faster. Even though most people have known this for yrs, its even in the tips section when you go into your sprint account. "Wifi to save battery" or something like that.

I use juice defender to turn off all radios when the screen is off. WiFi and 3g will pop back on within seconds of the screen being back on. I know not everyone finds juice defender useful, but I love it
dschoenike

[Q] 3G Battery Drain

I have noticed that when I am on 3G, my battery drains very rapidly. Usually like 3% a minute. Is there anyway to fix this, if this is abnormal?

ra9b said:
I have noticed that when I am on 3G, my battery drains very rapidly. Usually like 3% a minute. Is there anyway to fix this, if this is abnormal?
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There's no fix to signal related drain. There are only two things that can be fixed really:
1. drain related to apps including unwanted prevention of deep sleep - wakelocks are normal
2. drain related to screen - lower brightness
3g drain is related to signal strength which there is no fix and 3g drains faster than wifi. Also, the older the battery, the less of a charge it can handle. If you're in an exceptionally poor signal area sometimes Verizon can get a signal extender. I haven't dealt with that but I've heard that sometimes happens if signal is bad.

ra9b said:
I have noticed that when I am on 3G, my battery drains very rapidly. Usually like 3% a minute. Is there anyway to fix this, if this is abnormal?
Click to expand...
Click to collapse
More than likley means that the phone isnt getting a good signal, and is using more battery trying to stay connected. You can try updating to the latest radio, and prl. Has it always done this, or did it just start recently?

Though 3% a minute is really fast. I usually am closer to 1% every minute of two of screen on time depending on signal. Keep in mind battery drain is not linear meaning it may seem to drop off faster at different percentages. I don't know the details of this but this may help:
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries

Thanks tiny and cmlusco. And no cmlusco, it has always done this. I did update my radio to yours (I don't remember which one exactly) and that helped. I'll search how to update prl. And thanks tiny. I'll look into that link.
Sent from my ADR6300 using xda app-developers app

And yeah, I have weak signal where I live (-92 dB usually) but I experience this multiple places.
Sent from my ADR6300 using xda app-developers app

ra9b said:
Thanks tiny and cmlusco. And no cmlusco, it has always done this. I did update my radio to yours (I don't remember which one exactly) and that helped. I'll search how to update prl. And thanks tiny. I'll look into that link.
Sent from my ADR6300 using xda app-developers app
Click to expand...
Click to collapse
To update the prl just dial *228 and select option 2.

I feel your pain. I work in an area of Tampa that has zero service and I mean ZERO. My phone tries desperately to cling to a signal and the battery drain is mind blowing. I usually have my phone in airplane mode and switch it off now and then to check for missed calls and what not. One of the roms I was using completely lost 3G and this was while I was at work. I had to change to a different rom after messing around with **778* I couldn't get it back.
Sent from my ADR6300 using xda premium

MagnaCore said:
I feel your pain. I work in an area of Tampa that has zero service and I mean ZERO. My phone tries desperately to cling to a signal and the battery drain is mind blowing. I usually have my phone in airplane mode and switch it off now and then to check for missed calls and what not. One of the roms I was using completely lost 3G and this was while I was at work. I had to change to a different rom after messing around with **778* I couldn't get it back.
Sent from my ADR6300 using xda premium
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That sucks. You need to switch carriers.
Sent from my Galaxy Nexus using Tapatalk 2

tiny4579 said:
That sucks. You need to switch carriers.
9
Sent from my Galaxy Nexus using Tapatalk 2
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It certainly sucks. But i dont really think its Verizons fault. I work on an AirForce Base. Cell phone service is scarce within the whole base. It does seem to be worse for Verizon and Sprint users from the people i had asked about it
Alot of the times my weather app will show totally different locations then where i am, I will pickup the weather forecast for Apollo Beach or Gibsonton(i dont even know where this is)

might be my imagination but i noticed this battery drain using 3G more when i switched to CM10.1(4.21) versus CM10(4.12).
but when on Wifi, my battery usage seems adequate to very good

It is your imagination. ROM has no bearing on 3g drain.
Sent from my Galaxy Nexus using Tapatalk 2