[Q] Wifi drains battery

[giedriusc]

Hi,

just got my brand new Transformer Infinity today and I'm pretty disappointed with battery life - without dock it lasts something between 5 and 6 hours while watching youtube and browsing web and that's not much more than my HTC One X. I found out that wifi drains more battery than the screen - 40%, which is pretty weird, because I'm sitting right next to the router and wifi signal is always stronger than -50dB. Have someone experienced something similar?

Battery stats are here: http :// db.tt/TSx6RHtB (please remove spaces, I'm new to the forums, so cannot post links yet).

 

[d14b0ll0s]

Hi,

just got my brand new Transformer Infinity today and I'm pretty disappointed with battery life - without dock it lasts something between 5 and 6 hours while watching youtube and browsing web and that's not much more than my HTC One X. I found out that wifi drains more battery than the screen - 40%, which is pretty weird, because I'm sitting right next to the router and wifi signal is always stronger than -50dB. Have someone experienced something similar?

Battery stats are here: http :// db.tt/TSx6RHtB (please remove spaces, I'm new to the forums, so cannot post links yet).

It's only a stat, doesn't mean that WiFi *drains* your battery..

 

[josuetenista]

Hi,

just got my brand new Transformer Infinity today and I'm pretty disappointed with battery life - without dock it lasts something between 5 and 6 hours while watching youtube and browsing web and that's not much more than my HTC One X. I found out that wifi drains more battery than the screen - 40%, which is pretty weird, because I'm sitting right next to the router and wifi signal is always stronger than -50dB. Have someone experienced something similar?

Battery stats are here: http :// db.tt/TSx6RHtB (please remove spaces, I'm new to the forums, so cannot post links yet).

Same as the prime. Wifi doesn't drain your battery, it's just miss calculated. What drains your battery is the high res screen

Sent from my GT-I9300 using xda premium

 

[giedriusc]

Same as the prime. Wifi doesn't drain your battery, it's just miss calculated. What drains your battery is the high res screen

Sent from my GT-I9300 using xda premium

Is there a way to check if it's miss calculated or if there is something wrong with wifi module? And if it's actually miss calculated, shouldn't Asus repair it to make sure it is calculated correctly?

 

[denniegst]

your argument might have more merit if you did a test with the wifi always on for a period of time vs without it on.

 

[giedriusc]

your argument might have more merit if you did a test with the wifi always on for a period of time vs without it on.

I tried to turn off wifi for a couple of minutes, battery stats show wifi consumption 0. After turning wifi on, wifi battery consumption goes very fast to 30 and later to more than 40%.

 

[Monoquark]

I tried to turn off wifi for a couple of minutes, battery stats show wifi consumption 0. After turning wifi on, wifi battery consumption goes very fast to 30 and later to more than 40%.

Since it might be miscalculated that could be wrong. Try watching a movie with another one of similar length without wifi. Afterwards compare battery percentage.

 

[MartyHulskemper]

The battery needs a few charge and discharge cycles before you will start to see more meaningful reports. Don't go around and unnerve people by posting about battery life when you cannot possible say anything about that particular issue right now. Let it settle in for a bit. Please.

 

[giedriusc]

Since it might be miscalculated that could be wrong. Try watching a movie with another one of similar length without wifi. Afterwards compare battery percentage.

Good idea, thanks, I'll try that.

 

[giedriusc]

The battery needs a few charge and discharge cycles before you will start to see more meaningful reports.

That's one of the many myths about lithium-ion batteries.

Don't go around and unnerve people by posting about battery life when you cannot possible say anything about that particular issue right now. Let it settle in for a bit. Please.

 

[MartyHulskemper]

No, it's not. Li-Ion batteries have hysteresis as well, and the circuitry needs some start and end points to calibrate itself. I would agree that in some cases, like in my SGS2, specific hardware is used that doesn't need as much info as other pieces do, but generally speaking, you can't expect full potential out of the box.

Posted for reference. You can keep believing in your myth busting capabilities; I do not have the illusion I can convince you otherwise.

 

[phonic]

No, it's not. Li-Ion batteries have hysteresis as well, and the circuitry needs some start and end points to calibrate itself. I would agree that in some cases, like in my SGS2, specific hardware is used that doesn't need as much info as other pieces do, but generally speaking, you can't expect full potential out of the box.

Posted for reference. You can keep believing in your myth busting capabilities; I do not have the illusion I can convince you otherwise.

I agree. As an SGS2 owner myself, I know that when a battery is first used, or removed and put back in, it takes the device a few cycles to properly calibrate the battery gauge to have accurate results. I imagine this is the norm across other devices as well.

 

[giedriusc]

I agree. As an SGS2 owner myself, I know that when a battery is first used, or removed and put back in, it takes the device a few cycles to properly calibrate the battery gauge to have accurate results. I imagine this is the norm across other devices as well.

Never experienced anything like that since Li-ion batteries came into production.

Btw, just did video tests with wifi on and off, there is almost no difference in battery usage (about 15% per hour with brightness about 50% and IPS+ off), so it seems the battery readings are wrong.

Also I found out today, that auto brightness does not work - stays at maximum level if you go into dark room from bright place forever, exactly the same problem someone experiences with earlier Transformer models. Does auto brightness work OK on your Infinity?

 

[glenner05]

Never experienced anything like that since Li-ion batteries came into production.

Btw, just did video tests with wifi on and off, there is almost no difference in battery usage (about 15% per hour with brightness about 50% and IPS+ off), so it seems the battery readings are wrong.

Also I found out today, that auto brightness does not work - stays at maximum level if you go into dark room from bright place forever, exactly the same problem someone experiences with earlier Transformer models. Does auto brightness work OK on your Infinity?

Auto brightness is buggy here also. Have to control brightness manually....

 

[MartyHulskemper]

Never experienced anything like that since Li-ion batteries came into production.

Well, you can't change the laws of physics.

Btw, just did video tests with wifi on and off, there is almost no difference in battery usage (about 15% per hour with brightness about 50% and IPS+ off), so it seems the battery readings are wrong.

Also I found out today, that auto brightness does not work - stays at maximum level if you go into dark room from bright place forever, exactly the same problem someone experiences with earlier Transformer models. Does auto brightness work OK on your Infinity?

My specimen does the same. Brightness doesn't go down when I turn off the light in the room, and it stays at the relatively high level it was at. So that currently makes three of us.

 

[thephreak99]

Using auto brightness on mine now. Seems fine. Regarding the battery usage, i have wlan at. 30% usage after alot of downloading.

Sent from my ASUS Transformer Pad TF700T using Tapatalk 2

 

[d14b0ll0s]

Apart from the physical characteristics of the batteries discussed above, it is a problem I have encountered in numerous Android devices - the stock battery stats are miscalculated in so many ways, we won't even have enough time to name them all (I remember users panicking about the dialer "draining" the battery in numerous threads, while in most cases it was only the stat issue showing the dialer using most of the battery after making/answering an initial call).

For some different measures, try different apps from Google Play, like Badass battery for example: https://play.google.com/store/apps/details?id=com.gsamlabs.bbm

 

[commanlin]

According to the review from Taiwan, the Infinity could watch youtube movies for almost 7 hours. The brightness was set to max, volume was set to 50%, using wifi to connect to internet.
http://www.mobile01.com/topicdetail.php?f=605&t=2798754&last=36953142

 

[KilerG]

According to the review from Taiwan, the Infinity could watch youtube movies for almost 7 hours. The brightness was set to max, volume was set to 50%, using wifi to connect to internet.
http://www.mobile01.com/topicdetail.php?f=605&t=2798754&last=36953142

http://www.engadget.com/2012/06/25/asus-transformer-pad-infinity-tf700-review/
Engadget said they got about 9:30 out of the thing. 14:43 with the dock attached. That's looping a 720p video with wifi on, and the screen cranked to 50%. I think with normal usage, you can crank out a good amount of time. You just have to find that sweet spot with battery usage. I know I'm still working that out on my Bionic...but I've gotten that to last all day lately.

 

[giedriusc]

http://www.engadget.com/2012/06/25/asus-transformer-pad-infinity-tf700-review/
Engadget said they got about 9:30 out of the thing. 14:43 with the dock attached. That's looping a 720p video with wifi on, and the screen cranked to 50%. I think with normal usage, you can crank out a good amount of time. You just have to find that sweet spot with battery usage. I know I'm still working that out on my Bionic...but I've gotten that to last all day lately.

After one week of usage mine lasts about 9 hours while idling with 50% brightness, about 4-6 hours while watching youtube or browsing and about 3 hours while watching videos or gaming at 100% brightness and IPS+ on. Right now battery is at 66% after 1:48 of youtube and browsing with about 35% brightness, Badass Battery estimation - 3:06 left. What is battery life on your Infinity?