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[Q] Actual battery life

Hi guys, any thoughts regarding Battery life? I get roughly 8 hrs, not the 9.5-10hrs advertised/reported in the forums. Of course, this is with very high use, screen on 7.5hrs, wifi on the whole time, plex on for an hour or so, mobo video playing for an hour, and web browsing for a couple of hours, and some games too. Is this standard? Dock battery is ok, gives around 5 hrs. Any ideas on improving battery? Screen stays at 60% brightness all the time. Plus i have cnn, facebook, youtube, pulse, cnbc and plume widgets on. And active mail sync in the background.
Sent from my Transformer TF101 using XDA Premium App

psycho2097 said:
Hi guys, any thoughts regarding Battery life? I get roughly 8 hrs, not the 9.5-10hrs advertised/reported in the forums. Of course, this is with very high use, screen on 7.5hrs, wifi on the whole time, plex on for an hour or so, mobo video playing for an hour, and web browsing for a couple of hours, and some games too. Is this standard? Dock battery is ok, gives around 5 hrs. Any ideas on improving battery? Screen stays at 60% brightness all the time. Plus i have cnn, facebook, youtube, pulse, cnbc and plume widgets on. And active mail sync in the background.
Sent from my Transformer TF101 using XDA Premium App
Click to expand...
Click to collapse
The 9.5h time is stated for constant 720p playback so I don't think your usage is that much higher. I never stopped the time for my ASUS but I am happy with it and I guess that's what matters most.
I use SetCPU (requires root) to set the clock speed to 216MHz when idle. That seems to improve battery life.

I am not getting anywhere close to 9 hours. At first I thought it's the apps I have been running in the background or the brightness, but it's the same after I adjust it. I get about 6 hours.

Dude....6 hours is pretty low.anyways, i havent rooted it yet because of the impending otas.will do it as soon as a gr8 custom rom comes out.
Sent from my Transformer TF101 using XDA Premium App

funnycreature said:
The 9.5h time is stated for constant 720p playback so I don't think your usage is that much higher. I never stopped the time for my ASUS but I am happy with it and I guess that's what matters most.
I use SetCPU (requires root) to set the clock speed to 216MHz when idle. That seems to improve battery life.
Click to expand...
Click to collapse
Yes but i do video streaming over wifi. Also my wifi is on the whole time. And as far as i know, wifi takes more battery than video decoding.
Sent from my Transformer TF101 using XDA Premium App

The 9.5 hours is for
Airplane mode
playing a local movie, only
display at about 30% based on the NITS listed and Anandtech measured brightness
I bet you can achieve the same if you duplicate their testing scenario.
As for improving battery life decreasing screen brightness can have a huge difference. The screen is often the #1 power usage item when I check on my phone. Also, reduce the checking frequency of any task that needs Wifi to get data.

It's been 15 days now since I had the TF and I can tell you based on my usage - I used up;
12% per hour - airplane mode, play games watch movies in auto brightness
1% per 2.5 hours standby.
So more or less 9 hours usage should be achievable.

I get about 18 hours of constant use with dock

I play with the thing all the time and I honestly haven't ended a day with my battery being below 50% yet.
Actually, out of fairly constant use, I haven't charged mine for, let's see... 2 days, 6 hours, and 52 minutes. Currently at 48% charge.
EDIT: Oh, and I don't have the dock, so it's not counting that.

Ayesuku said:
I play with the thing all the time and I honestly haven't ended a day with my battery being below 50% yet.
Actually, out of fairly constant use, I haven't charged mine for, let's see... 2 days, 6 hours, and 52 minutes. Currently at 48% charge.
EDIT: Oh, and I don't have the dock, so it's not counting that.
Click to expand...
Click to collapse
Screen brightness?

any idea on getting the battery usage percentages? mine shows a graph and below it: battery usage data not available. i want it like i get on my captivate: the detailed battery use percentages.
Sent from my Transformer TF101 using XDA Premium App

Mines draining less than 1% per hour when screen is off but device still on
LEEDROID GB3.0.1DESIRE HD using XDA PREMIUM

Sam9938 said:
Screen brightness?
Click to expand...
Click to collapse
It stays on auto. When it lasts me multiple days, I can't say I really worry about saving battery much.
For example, I unplugged it this morning at 7, played with it quite a bit today including playing Zenonia for a little over an hour and letting my friends play around, and my battery is currently at 75%.

Hi all. I just wanted to chime in on this thread here. Im a former owner of a xoom and can say that tablet was a beast when it came to battery life. I could have a full charge last for 2 weeks+ with very minimal use all consumed by idle standby. That was something to be said. The tf isn't as good; I can tell already, but I was surprised today! I charged it overnight and unplugged it around 11am. 98%, until I woke it up right now! Its at 97% with 13 hrs 39min. I probably had the screen on for only 5 minutes, but pretty good! One thing to point out that helped me a lot was to always have the tab in airplane mode. You can still have the wifi on and stay in airplane mode. That seemed to make a difference with the xoom. Just my $.02
Sent from the most "Epic" phone in the world! ...Using XDA Premium app

I get 5ma constant use in sleep mode. By that logic, u would lose 1% in 13 hours on sleep mode. So yeah, idle use is pretty good. Decent tested flight mode yet though.but seriously, y doesn't battery use show the percent divisions like my phone? :O
Sent from my GT-I9100 using XDA App

Its doesn't seem that any of you guys are reading the manual when it comes to battery.
It says it clear in the manual. Why not follow what the book says, I guess some dont read.​
"If you intend to use battery power, be sure to fully charge your battery pack before going on long trips.Remember that the power adapter charges the battery pack as long as its plugged into the computer and AC power source. Be aware thats it takes much longer the charge the battery pack and when the Eee Pad is in use"
Remember to fully charge the battery (8 hours or more) before the first use and whenever it is depleted to prolong battery life. The battery reaaches it's maximum capacity after a few full charging and discharging cycles.
"To prolong Battery life, charge the battery for up to 8 hours when using Eee Pad for the first time and whenever the battery power is fully depleted.

[Q] Is this normal battery life?

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33% after 5 hours, but taking into account:
1. Phone set to GSM Auto (PRL), BT off
2. Screen brightness set to max, note how long the screen was on during the 5 hours from the screenshot
3. Three hours spent going in and out of signal/bad coverage areas
4. Music on headphones + DSP Manager enabled about three hours
5. Watched 1 hour of video (max brightness)
6. Heavy internet use and messaging for approx 4 hours
7. 15 minutes of phone calls
so 33%... does that seem normal after the above?

Looks quite typical to me. Music on for several hours? You're taxing the processor a bit there. You'll want to recharge the phone nightly (as all of us do...)

jez9999 said:
Looks quite typical to me. Music on for several hours? You're taxing the processor a bit there. You'll want to recharge the phone nightly (as all of us do...)
Click to expand...
Click to collapse
I end up having to charge it halfway through the day then again at night, as I use it quite a bit. But I was having concerns about battery life as my power usage readings were always higher than everyone elses when idle.
I use my phone as my music player while I commute, although that doesn't seem to be very taxing, I let the music play overnight with the battery at 100%, ten hours later it was still at 65%. But I was not sure about during use, I always felt the percentage went down too quickly.

I'm a Nexus S user, so I can't comment on what battery life is considered "normal" for Desire S.
What I do know is that:
With your usage, that would be normal for Nexus S. In fact, better than my setup (which is stock 2.3.4 ROM). Three hours of music + 1 hour of video and your phone's still alive?
Amazing.
What ROM are you on?
Now I want me a Desire S!!
Edit: I missed the fact that during the 3-hour music, the screen is mostly off. Well, no longer *that* amazing (sorry ), but still considerably better than my Nexus S!

The point to note is the angle of the graph when the screen is on compared to that when the screen is off
Without stating the obvious screen usage kills the battery, so I'd suggest keeping the screen bright ness to a minimum and I'd recommend against using the auto setting as it defaults way to high, you'll only need high brightness in direct sunlight
I get similar numbers, I'd consider your usage as heavy and undercut consider taking a spare charger with you so that you can top up during day after periods of heavy usage
Instal an application like battery monitor widget to log your battery usage while the device is sleeping (screen off and not playing music) to determine if you are suffering from a battery drain
Sent from my HTC Desire S using XDA Premium App

My battery lasts for 16+ hrs..
usage includes 1 hr of music,
1 hr of video, 1 hr gaming,
2-3hr wifi ON
Net always ON on EDGE (not 3G) for sync except the night where 6 hrs GPRS is off,
\m/

ben_pyett said:
The point to note is the angle of the graph when the screen is on compared to that when the screen is off
Without stating the obvious screen usage kills the battery, so I'd suggest keeping the screen bright ness to a minimum and I'd recommend against using the auto setting as it defaults way to high, you'll only need high brightness in direct sunlight
Click to expand...
Click to collapse
Good tips. I just tried turning the brightness down (it was at max) and I barely noticed the difference until it got below 50%! This may significantly increase battery life, we'll see.

Thank you all for your responses

ben_pyett said:
The point to note is the angle of the graph when the screen is on compared to that when the screen is off
Without stating the obvious screen usage kills the battery, so I'd suggest keeping the screen bright ness to a minimum and I'd recommend against using the auto setting as it defaults way to high, you'll only need high brightness in direct sunlight
I get similar numbers, I'd consider your usage as heavy and undercut consider taking a spare charger with you so that you can top up during day after periods of heavy usage
Instal an application like battery monitor widget to log your battery usage while the device is sleeping (screen off and not playing music) to determine if you are suffering from a battery drain
Sent from my HTC Desire S using XDA Premium App
Click to expand...
Click to collapse
I've already tried using battery monitors - and I was constantly getting higher readings than other users (i.e. Battery Monitor Widget would never go below 14mA on sleep, when other users were getting 6-9 mA) so I was thinking maybe the readings are false. Hence the reason for this thread - rather than using mA readings, I thought I'd post this and compare the actual battery life with other users.

bprabawabr said:
I'm a Nexus S user, so I can't comment on what battery life is considered "normal" for Desire S.
What I do know is that:
With your usage, that would be normal for Nexus S. In fact, better than my setup (which is stock 2.3.4 ROM). Three hours of music + 1 hour of video and your phone's still alive?
Amazing.
What ROM are you on?
Now I want me a Desire S!!
Edit: I missed the fact that during the 3-hour music, the screen is mostly off. Well, no longer *that* amazing (sorry ), but still considerably better than my Nexus S!
Click to expand...
Click to collapse
The screen wasn't off for the whole time while listening to music, I was using Whatsapp for most of the time along side. I'm on the 1.1 beta Superkid CM7 ROM.

Whoa! That's not normal battery life. Please see my guide thread, and especially see the last post I made this morning.
Ben is right though, screen brightness at 100% won't be helping your cause. I leave mine at 45% when indoors.
PM me if you need help.
Sent from my HTC Desire S using XDA Premium App

wnp_79 said:
Whoa! That's not normal battery life. Please see my guide thread, and especially see the last post I made this morning.
Ben is right though, screen brightness at 100% won't be helping your cause. I leave mine at 45% when indoors.
PM me if you need help.
Sent from my HTC Desire S using XDA Premium App
Click to expand...
Click to collapse
Thanks, your guide was very handy. I've considered all the things there, but as I have been crying about for the last couple of weeks, no matter what ROM I use, my power consumption (according to Battery Monitor Widget) never went below 14mA. In CM7 (the ROM I use), the one item always eating most battery (whether phone is idle or heavily used), is "Mobile Standby". In other ROMs, "Mobile Standby" is much further down the list as it should be, but my usage is still never lower than 14mA.
I figured perhaps there was something wrong in the readings, or in the information displayed, so decided to just do a subjective test by using the device very heavily just to see what the battery drain would be like.
So my case above, was a 5 hour period of heavy internet browsing, internet messaging (Whatsapp), 3 hour music playback (continuous, while messaging/browsing), 1 hour video playback, with a combination of 2G, 3G, no signal, and bad coverage areas, a bit of GPS usage, and the screen was on for a large portion of the time, on 100% brightness.
As you said in your guide - when you do a second charge in the middle of the day, the battery life for that charge is lower than an overnight charge. Although I haven't really taken notice of this, the above took place in the afternoon, after being charged from around 50% to 100%. I kept it plugged into a USB charger until around 3pm, then conducted the above drainage test.
When you say this is not normal battery life, what do you mean? Should I have still had a lot more remaining charge after all that heavy drainage + screen on (at max brightness) for most of the time?

djsubtronic said:
Thanks, your guide was very handy. I've considered all the things there, but as I have been crying about for the last couple of weeks, no matter what ROM I use, my power consumption (according to Battery Monitor Widget) never went below 14mA. In CM7 (the ROM I use), the one item always eating most battery (whether phone is idle or heavily used), is "Mobile Standby". In other ROMs, "Mobile Standby" is much further down the list as it should be, but my usage is still never lower than 14mA.
I figured perhaps there was something wrong in the readings, or in the information displayed, so decided to just do a subjective test by using the device very heavily just to see what the battery drain would be like.
So my case above, was a 5 hour period of heavy internet browsing, internet messaging (Whatsapp), 3 hour music playback (continuous, while messaging/browsing), 1 hour video playback, with a combination of 2G, 3G, no signal, and bad coverage areas, a bit of GPS usage, and the screen was on for a large portion of the time, on 100% brightness.
As you said in your guide - when you do a second charge in the middle of the day, the battery life for that charge is lower than an overnight charge. Although I haven't really taken notice of this, the above took place in the afternoon, after being charged from around 50% to 100%. I kept it plugged into a USB charger until around 3pm, then conducted the above drainage test.
When you say this is not normal battery life, what do you mean? Should I have still had a lot more remaining charge after all that heavy drainage + screen on (at max brightness) for most of the time?
Click to expand...
Click to collapse
I suppose if you have bad signal coverage AND heavy use AND screen at 100% brightness then maybe over 5 hours its to be expected. I must admit I've never tried recreating this. What do you get with more normal use typically? Or is this normal for you? I have found those current monitor apps/widgets to be so inconsistent I've stopped using them. Instead, I've started looking at apps that monitor CPU and Wake Lock times. I've found it much more helpful in tracking down battery drain.

wnp_79 said:
I suppose if you have bad signal coverage AND heavy use AND screen at 100% brightness then maybe over 5 hours its to be expected. I must admit I've never tried recreating this. What do you get with more normal use typically? Or is this normal for you? I have found those current monitor apps/widgets to be so inconsistent I've stopped using them. Instead, I've started looking at apps that monitor CPU and Wake Lock times. I've found it much more helpful in tracking down battery drain.
Click to expand...
Click to collapse
Due to my long daily commute, this is almost my normal use (although not this excessive).
What app would you recommend to monitor CPU and Wake Lock times?
Thanks.

djsubtronic said:
Due to my long daily commute, this is almost my normal use (although not this excessive).
What app would you recommend to monitor CPU and Wake Lock times?
Thanks.
Click to expand...
Click to collapse
decent battery stats application, that shows wake locks information in detail
http://forum.xda-developers.com/showthread.php?t=1179809
Sent from my HTC Desire S using XDA Premium App

ben_pyett said:
decent battery stats application, that shows wake locks information in detail
http://forum.xda-developers.com/showthread.php?t=1179809
Sent from my HTC Desire S using XDA Premium App
Click to expand...
Click to collapse
That's the one!
Sent from my HTC Desire S using XDA Premium App

Having a look at the app, I don't see how it helps determining causes of battery drain? Could anyone shed a bit more light?
For example these are my top entry in "Wakelocks" and "Since charged":
android.media.MediaPlayer
com.tbig.playerpro.PlayerPro
3 h 51 m 1 s (13861 s) Count:180 44.1%
GTALK_CONN
Google Services
3 m 34 s (214 s) Count:1669 0.7
What do all those figures actually mean?

That's quite normal for a heavy usage with max brightness. But i also noticed that between 100% and 50% brightness there's not much difference. So i just set it around 50% outdoor and 30% indoor.
I think those figures mean that the music player is keeping your device awake for those 3 hours you played the music. Which probably explains the earlier part of your graph where it's awake but screen is not on. I think.

amonrei said:
That's quite normal for a heavy usage with max brightness. But i also noticed that between 100% and 50% brightness there's not much difference. So i just set it around 50% outdoor and 30% indoor.
I think those figures mean that the music player is keeping your device awake for those 3 hours you played the music. Which probably explains the earlier part of your graph where it's awake but screen is not on. I think.
Click to expand...
Click to collapse
That particular info from BetterBatteryStats was not actually for the same period as in the screenshot, but I think what you said makes sense!

Thanks, your guide was very handy. I've considered all the things there, but as I have been crying about for the last couple of weeks, no matter what ROM I use, my power consumption (according to Battery Monitor Widget) never went below 14mA. In CM7 (the ROM I use), the one item always eating most battery (whether phone is idle or heavily used), is "Mobile Standby". In other ROMs, "Mobile Standby" is much further down the list as it should be, but my usage is still never lower than 14mA.
Click to expand...
Click to collapse
How often do you allow your phone to check for emails? Maybe this is the cause of 14mA. Do you use a 3rd party email app?

[Q] battery?

How is the battery on your transormer without the dock? How much hours of gaming can you get? Mine goes to about half after about 2 hours and a half of heavy use.

Probably 4-5 hours
Sent from my SGH-T989 using XDA

I'm finding my battery life poor. Is this just the way the TF300 is?
Asus says 10 hours, Engadget say just over 8 hours playing video at 50%.
I'm disappointed with mine I go down to below 30% after about 3 hours use constant usage easily. Even when it's asleep it takes a couple % down per hour.

psjw12 said:
I'm finding my battery life poor. Is this just the way the TF300 is?
Asus says 10 hours, Engadget say just over 8 hours playing video at 50%.
I'm disappointed with mine I go down to below 30% after about 3 hours use constant usage easily. Even when it's asleep it takes a couple % down per hour.
Click to expand...
Click to collapse
For the asleep part, it might help to turn on the setting to disconnect wifi while sleeping. I get extremely long battery life, but I also have very light usage because I work a lot. A lot of it could depend on what you are doing for that constant use. Also, are you rooted? and if so have you overclocked?

I'm frankly quite surprised at the poor battery life. I depleted the entire dock battery this morning by using it about 3 hours. The main tab battery is now at 80% so will probably last about another 3 hours or so on heavy usage. I'm not all that impressed at all on 6 hours of usage WITH the dock keyboard.
Originally this morning I actually thought something was wrong with my keyboard battery since it was depleting so fast, but I guess not... Wow.
What do the "balanced" ... "performance" settings in the menu actually do?
Sent from my ASUS Transformer Pad TF300T using xda premium

TXKSSnapper said:
For the asleep part, it might help to turn on the setting to disconnect wifi while sleeping. I get extremely long battery life, but I also have very light usage because I work a lot. A lot of it could depend on what you are doing for that constant use. Also, are you rooted? and if so have you overclocked?
Click to expand...
Click to collapse
Well my Wifi wake setting is set to never on when sleeping. I'm rooted but I've not overclocked. I just use the built in Asus model (eco, performance and balaned). It's normally on balanced.
Sent from my ASUS Transformer Pad TF300T using XDA

Jarm3r said:
What do the "balanced" ... "performance" settings in the menu actually do?
Click to expand...
Click to collapse
From what I've read Eco clocks the cpu at 600mhz, balanced at 1.2ghz and performance at 1.3ghz
Sent from my ASUS Transformer Pad TF300T using XDA

Jarm3r said:
I'm frankly quite surprised at the poor battery life. I depleted the entire dock battery this morning by using it about 3 hours. The main tab battery is now at 80% so will probably last about another 3 hours or so on heavy usage. I'm not all that impressed at all on 6 hours of usage WITH the dock keyboard.
Originally this morning I actually thought something was wrong with my keyboard battery since it was depleting so fast, but I guess not... Wow.
What do the "balanced" ... "performance" settings in the menu actually do?
Sent from my ASUS Transformer Pad TF300T using xda premium
Click to expand...
Click to collapse
I dont even get 3 hours i think....
Sent from my ASUS Transformer Pad TF300T using XDA

Honestly, I've been pretty happy with mine. I just don't see any scenario in which I would drain the dock then drain the main battery and not see a whole day of usage. I just don't see myself doing 6 straight hours of heavy gaming.

Bare in mind that gaming is the most power consuming operation. 5-6 hours continuous gaming doesn't seem too bad to me.
What's the battery life like for internet browsing?

dsf3g said:
Honestly, I've been pretty happy with mine. I just don't see any scenario in which I would drain the dock then drain the main battery and not see a whole day of usage. I just don't see myself doing 6 straight hours of heavy gaming.
Click to expand...
Click to collapse
2stepsteve said:
Bare in mind that gaming is the most power consuming operation. 5-6 hours continuous gaming doesn't seem too bad to me.
What's the battery life like for internet browsing?
Click to expand...
Click to collapse
Is that with or without dock?

My battery is currently at 35% and it has been 22 hours since I unplugged it from the charger. I have 4.5 hours of screen time which included heavy browsing and playing Draw Something. This is without the dock.
I am using the .29 build.prop mod as well as the Transformer overclock app (I forgot what it was called) that uses 1ghz for eco, 1.3 for balanced and 1.6 for performance. My setting has been on balanced.
Overall I'm happy with my battery life although I don't play much games on it. FYI I lost approximately 12% of battery life overnight. I don't remember the exact number so I'll check again tomorrow.
If you are rooted, maybe you should try the Battery Calibration app on the Play Market?

]
Battery life at about 96% after about ten minutes of light use of the tablet for me. Not great...
Sent from my ASUS Transformer Pad TF300T using XDA

I can't say I'm very happy with the battery life of my TF300T (no dock)
It's stock ICS with the WW .29 firmware and powermanagement is set to balanced.
But I (also) think that there is a software thingy going on:
After a 100% charge I left it on standby/sleep from 8 in the morning untill 6 in the evening. 11 hours of standby mode alone drained almost 20% of the battery
I double checked the battery usage and indeed it's the idle mode that was so energy hungry.
I saw there is a MOD here at XDA that fixes the standby power consumption and I will be giving that a try for sure.
With normal use (no movies, just browsing, moving files around from and to my NAS, reading PDF's) it uses 50% in about 3 hours.
Playing movies (WIFI turned off) does about the same thing, so I guess it's mainly the screen that consumes all the energy.
I do not play games, so no experiences with that.
What I would like to try is to have PowerAmp play music, screen turned off and then see how much battery is used.
Recharging is pretty fast btw: The TF300T does a better job than my Desire S.

KindaUndisputed said:
]
Battery life at about 96% after about ten minutes of light use of the tablet for me. Not great...
Sent from my ASUS Transformer Pad TF300T using XDA
Click to expand...
Click to collapse
What do you consider light use? also, what is your screen brightness at?

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I get about 25-30 mins each 5% on light use. My brightness is never over 50% and I'm underclock to 880mhz, everything still runs smoothly. Also most of the time I'm on power saving mode. Also most of the time spent on those 30+mins were on Tapatalk with the dark theme, so there's no much power used for the background since its a dark grey color not bright white as the default.
Sent from my ASUS Transformer Pad TF300T using Tapatalk 2

TXKSSnapper said:
What do you consider light use? also, what is your screen brightness at?
Click to expand...
Click to collapse
Screen brightness relatively high and a bit of browsing
Sent from my ASUS Transformer Pad TF300T using XDA

KindaUndisputed said:
Screen brightness relatively high and a bit of browsing
Sent from my ASUS Transformer Pad TF300T using XDA
Click to expand...
Click to collapse
Screen Brightness can drain a battery pretty quickly. The only other things I can think of would be gps, or bluetooth being on. If you are rooted, you could underclock and get a lot better battery life that way.

jgaf said:
I get about 25-30 mins each 5% on light use. My brightness is never over 50% and I'm underclock to 880mhz, everything still runs smoothly. Also most of the time I'm on power saving mode. Also most of the time spent on those 30+mins were on Tapatalk with the dark theme, so there's no much power used for the background since its a dark grey color not bright white as the default.
Sent from my ASUS Transformer Pad TF300T using Tapatalk 2
Click to expand...
Click to collapse
how do i get extended battery stats?
Sent from my ASUS Transformer Pad TF300T using XDA

The app I'm using is Badass battery monitor.
Sent from my ASUS Transformer Pad TF300T using Tapatalk 2

Wifi issue?

Ok I think I found an issue with my infinity and need some confirmation. Here is the test. Charge tablet to full. I remove from charger and spend 10-15 minutes browsing the Web. Now check battery usage. Is Wifi your number on power drain? Here is what mine looks like.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2

For comparison I used my xoom tablet for 10-15 minutes doing similar activities and my wifi power usage was around 2%.
Also just an FYI I'm not in a strange wifi environment that creates any issues. I'm about 6 feet from my wifi hub and I noticed this usage today after work where wifi was between 50-60% of my total usage and that was on my work wifi.
Anyway I'd be really interested to hear if anyone is seeing a similar issue. I also created a ticket with Asus asking about this issue.

I hope you know that the stock battery stats are very unreliable. Under a better battery stats app, I've found that wifi isn't quite as consuming as apps, so I think the system stats are incorrect
Sent from my ASUS Transformer Pad TF700T using xda app-developers app

ethion said:
Ok I think I found an issue with my infinity and need some confirmation. Here is the test. Charge tablet to full. I remove from charger and spend 10-15 minutes browsing the Web. Now check battery usage. Is Wifi your number on power drain? Here is what mine looks like.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2
Click to expand...
Click to collapse
My wifi doesn't even show up. My unit is fine..

Mine has it. I doubt its that big of an issue anyway.
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2

xRevilatioNx said:
My wifi doesn't even show up. My unit is fine..
Click to expand...
Click to collapse
Your is what I'd expect. In fact you got 91% after two hours. That is better than my xoom. This explains why some people claim good performance and battery life. Mine will be below 90% in like 30 minutes usage.
I think there is a wifi issue and this might be a way of identifying bad tablets. I'll see what the ASUS support people say and post it here. The bad news is this looks like a hardware issue...
Before I completely get excited can you make sure your wifi is always on. Go to settings, wifi, advanced, make sure keep wifi on during sleep is always.

xRevilatioNx said:
My wifi doesn't even show up. My unit is fine..
Click to expand...
Click to collapse
I was just noticing that you tablet doesn't have the asus icons for back, home, tasks. Are you using a stock infinity for your screen shot?!!

ethion said:
I was just noticing that you tablet doesn't have the asus icons for back, home, tasks. Are you using a stock infinity for your screen shot?!!
Click to expand...
Click to collapse
The screenshot is also missing the "ASUS Customzied setting" menu option on the left, right under Apps. Looks like either custom ROM or not an ASUS tablet perhaps.
For what it is worth, I have noticed the same issue with my Wifi eating up tons of battery. I haven't done any tests, but it certainly feels like my battery is draining pretty quickly with Wifi on. It is certainly draining much faster than my TF101....I would expect that to be the case to some extent because of the processor and screen upgrade, but not this much. There is another thread going on TranformerForums about the same issue. Someone reported that leaving their device fully charged with Wifi turned on overnight had drained it down to 19% by morning, with no use.
Not sure yet if this is a real issue, but it seems strange that Wifi would use significantly more battery than Screen.
-Chris

Don't rely on the battery usage screen. It's not like it's got an ammeter coupled to every battery drain. It just calculates percentages based on the information it got, it's all guesswork and needs lot of calibration to be correct. The reason WiFi is blamed as the major drain is probably that it's running all the time (and its power usage might not be calibrated for the battery usage screen). The stats won't know at all if e.g. the kernel gets stuck in an infinite loop and drains the battery...
Personally, I only trust the info the battery usage screen gives me about apps. If an app has a high percentage, it's probably not right. The rest of the breakdown is mostly bogus.

firetech said:
Don't rely on the battery usage screen. It's not like it's got an ammeter coupled to every battery drain. It just calculates percentages based on the information it got, it's all guesswork and needs lot of calibration to be correct. The reason WiFi is blamed as the major drain is probably that it's running all the time (and its power usage might not be calibrated for the battery usage screen). The stats won't know at all if e.g. the kernel gets stuck in an infinite loop and drains the battery...
Personally, I only trust the info the battery usage screen gives me about apps. If an app has a high percentage, it's probably not right. The rest of the breakdown is mostly bogus.
Click to expand...
Click to collapse
Well something is eating battery fast.. I have my xoom and my infinity sitting side by side right now and my xoom is at 80% battery after 2:30 hours on while the Infinity is at 62% after 2:41 on. So the infinity is draining battery about twice as fast as my xoom. And the xoom shows the top battery usage as the screen where wifi isn't even making the list.

ethion said:
Ok I think I found an issue with my infinity and need some confirmation. Here is the test. Charge tablet to full. I remove from charger and spend 10-15 minutes browsing the Web. Now check battery usage. Is Wifi your number on power drain? Here is what mine looks like.
Click to expand...
Click to collapse
There are already some threads that discuss this topic. The battery meter has a bit of a bug where it shows the WiFi % based on how long the wifi has been connected rather than how much actual power it has used. Mine does the same thing with 85% battery atm but it has been running off of the charger for 1d 13h and still has 37% left.
It is a battery meter issue and not an energy drain issue.

Xoom is now 68% after 3:30
Infinity is now 50% after 3:40

ethion said:
Xoom is now 68% after 3:30
Infinity is now 50% after 3:40
Click to expand...
Click to collapse
Well, the Infinity has more hardware to give power to.
However, my Infinity is at 62% after 10 hours... Most (about 80%) of that time, it's been sleeping (but on), though. Did you actively use both your Xoom and Infinity during the reported time?
How does the detailed battery usage screen (touch the graph in the normal battery usage screen) look? Here's mine (the gap is a reboot):

Google services... Back in my day, these botnets ran silently.
Sent from my FHD porn machine.

firetech said:
Well, the Infinity has more hardware to give power to.
However, my Infinity is at 62% after 10 hours... Most (about 80%) of that time, it's been sleeping (but on), though. Did you actively use both your Xoom and Infinity during the reported time?
How does the detailed battery usage screen (touch the graph in the normal battery usage screen) look? Here's mine (the gap is a reboot):
Click to expand...
Click to collapse
Yes I've been kinda using them. I've had them in google plus and swipe around every once in awhile.
I left for lunch and turned them both off.
infinity is now at 40% and xoom is at 55%. a bit over 6 hours since both were pulled off the charger. Screen has been on over 4 hours.

Here is the current status of infinity 37 percent
Sent from my ASUS Transformer Pad TF700T using Tapatalk 2

Here is the picture of my xoom at 53%

From just eyeballing the two graphs it looks like the infinity sleeps better where my xoom is staying active constantly. None the less when the screen is on the infinity consumes power quite a bit faster.
It is clear that the xoom does quite a bit better on battery life than the infinity.

Mine does this too, but battery life is solid
Sent from my Jelly Beaned GNexus

Battery Drain
I just got mine yesterday and the battery drain is unexceptionable. I fully charged it last night and then was off and on it this morning before going to work. After getting into the office it was more than 50% drained and before lunch it was well below 30%. I have the TF101 and it hasn't been charged in two days and it is still at 79% with everything turned on.
I have not had a chance to look into this but I find that amount of drainage excessive.
On a side note I pretty much just have the stock apps running on this. I did just do a cold boot so I will see if that helps at all.
Rex

Anyone gets 8-9 hours of browse time?

I am still w bit confused wheather 2 units I had was faulty or not. ASUS definitely has bad QC. I was under the impression with constant browsing with low screen brightness and balance mode, we can only get 5-6 hours of battery. But some review sites state more and I even so similar discussion back when original transformer was released. So I want to verify.
Does anyone get over 8 hours of battery in balance mode, low screen brightness while constantly browsing? The easiest way to test is browse for an hour and see how much battery loss. If 20%, you get only 5 like I did.

last time i checked, i had 7.5 hours of screen on and wifi was actually my biggest battery hog by a 2:1 ratio, and still had 30 something % left. i dont have battery issues, i'm not sure if my transformer is a very recent build but i dont have ANY of the issues reported on this forum. no clicking, bleeping, battery problems or any other. my only problem is really just software related just like a lot of other have, lag, reboots, force close, but i know asus will fix that shortly

polish_pat said:
last time i checked, i had 7.5 hours of screen on and wifi was actually my biggest battery hog by a 2:1 ratio, and still had 30 something % left. i dont have battery issues, i'm not sure if my transformer is a very recent build but i dont have ANY of the issues reported on this forum. no clicking, bleeping, battery problems or any other. my only problem is really just software related just like a lot of other have, lag, reboots, force close, but i know asus will fix that shortly
Click to expand...
Click to collapse
Did you have a dock? That's impressive number even if you didn't use browser at all. Still far superior to way I had. Do you mind browse formalize 30min and see how much battery drop you see? Also ,let me know which mode and brightness you used.

>android in charge of battery life
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le rustle face

no of course no dock on...if i have a dock on i can last days. The most i lasted with a dock and moderate use like reading about 1-1.5 hours of zinio magazines, checking a few youtube videos, some fbooking, twitter, tapatalk and some browsing all that per day was at least 7 days...i'm not sure how much time exactly because when i use the dock the battery stats seem to reset every time i close the lid or at random times....
Look at these stats. My usage was: downloaded 2 issues of my subscriptions on zinio, downloaded tonights breaking bad episode off torrents, saw a few youtube videos (about two 5-7 min vids), facebooked a good half hour, read half my issue of XXL magazine while sitting on the crapper and while waiting for my ribs to cook for a total of about 45 minutes of reading, + making about 6-7 benchmarks test on antututu to play around with set cpu (all but 2 tests were on performance modem the rest were on balanced), and your requested 30 mins of non stop browsing which consisted of looking for a wallpaper and browsing on ebay, all that in 3:26 hours and i got 26% battery drain, brightness was at about 30%, and this is what i consider it to be HEAVY use as screen on time is 1:56h.
Usage before your 30 mins of browsing
after your 30 mins of non-stop browsing:
So about 8% drop in 30 minutes of browsing and this is including 24 wallapers i downloaded from google images.
P.S. I'm rooted, not unlocked and i'm not debloated as i,m waiting for JB to really start playing around with the pad

mine would drop about 10% every 30 minutes watching videos - netflix or local.
my note, however, droped 25% after 3.75 hours of straight usage. this was with 3 episodes of The Unit, drawing, web surfing, and streaming netflix. i had to do all this while my daughter played around at monkey joe's.
all the reviews i've seen show the that the infinity gets 8hrs at 50% brightness. all my usage on both infinities and the gnote were all under 20% with headphones.

With dock, I am able to get 10 hours of straight use (non stop) playing various games. Played Angry Birds, Dead Trigger, ShadowGun, Amazing Alex, Drisk, etc. No wifi was on. I get about 6.5 hours on tablet alone.
Sent from my ASUS Transformer Pad TF700T xda app-developers app

Keion said:
>android in charge of battery life
le rustle face
Click to expand...
Click to collapse
How did you manage to put android in charge of battery instead of asus, simply disabling asus battery?
Sent from my ASUS Transformer Pad TF700T using xda app-developers app

Nah

megamoz said:
How did you manage to put android in charge of battery instead of asus, simply disabling asus battery?
Sent from my ASUS Transformer Pad TF700T using xda app-developers app
Click to expand...
Click to collapse
It's a joke. All the ignorant ipeople always say android gets horrible battery life on the tech forums I go to. I find it funny that my tablet actually does get bad battery life. Then again, I never use powersaver mode so I guess its fine.
le rustle face

Thanks all for taking time to post a reply.
So I guess what I experienced with 2 units were indeed what it is. For some, perhaps many, infinity's battery life may be enough but unfortunately for my use it was just too short. Video play time or ebook reading time were totally fine. Its when we use browser, the jump to 20%/hr drain i.e. mere 5 hours of battery life with tablet alone. This won't last me a whole day. Sure dock would give extra power, but I got Macbook Air so if I want to carry actual laptop, I would actually do so. One reason I have been purchasing different tablet is mainly the use as tablet.
I don't know if it is fixable by firmware, but Samsung certainly does seem to achieve pretty similar battery life whether using browser or not, so I wonder it is something at the software level that ASUS is missing.
But I really appreciate all for answering this question.
Thanks

I too spent a considerable amount of time researching this as I thought my unit may have been defective. Long answer short it gets about 5 hours if you're web browsing even with low brightness.
I'm hoping a software patch can improve it at least somewhat, as having the WIFI on seems to drain the battery excessively compared with it off.

nonstop14 said:
I too spent a considerable amount of time researching this as I thought my unit may have been defective. Long answer short it gets about 5 hours if you're web browsing even with low brightness.
I'm hoping a software patch can improve it at least somewhat, as having the WIFI on seems to drain the battery excessively compared with it off.
Click to expand...
Click to collapse
Yeah definitely that's what threw me off. We all talk about/assume higher pixel density thus more battery drain, which made sense but infinity's battery life with book reading weren't bad at all. It's the WIFI, which is very strange.

Hi
The Wi-Fi usage seems very high on these. No way should the Wi-Fi be using more power than the screen, certainly doesn't on my HTC One X, which due to laws and regulation will be transmitting with the same power as the TF700, but the screen will be using a lot less power than the TF700 as it's smaller so needs less back-light, so if anything Wi-Fi would be an even bigger percentage on my phone compared to the TF700, but rarely is Wi-Fi a quarter of the screen use, often much less.
Unless that Wi-Fi is doubling up as a small microwave oven, power usage should be quite a small percentage, so either the TF700 is mis-reporting Wi-Fi usage, or their is a fault (software/hardware?) with the Wi-Fi card.
Regards
Phil

no , we can not
I think we can not , it is too fake to say the battery would last up to 9.5 hrs.....
The wifi indeed has some problems, which would comsume more than half of the battery life.
Maybe.... asus intends to increase the wifi power to improve the performance!

PhilipL said:
Hi
The Wi-Fi usage seems very high on these. No way should the Wi-Fi be using more power than the screen, certainly doesn't on my HTC One X, which due to laws and regulation will be transmitting with the same power as the TF700, but the screen will be using a lot less power than the TF700 as it's smaller so needs less back-light, so if anything Wi-Fi would be an even bigger percentage on my phone compared to the TF700, but rarely is Wi-Fi a quarter of the screen use, often much less.
Unless that Wi-Fi is doubling up as a small microwave oven, power usage should be quite a small percentage, so either the TF700 is mis-reporting Wi-Fi usage, or their is a fault (software/hardware?) with the Wi-Fi card.
Regards
Phil
Click to expand...
Click to collapse
Well many on this forum says its miscalculating, which may partly true but not entirely because as Battery drain was my concern on this system I did multiple trial and basically WIFI on with active browsing crank up the drainage to 20%/hr from 10%/hr without browser i.e. WIFI on but just reading ebook. So WIFI is truly consuming battery.
On my Galaxy Note 10.1, whether actively browsing or not the battery drain still remains 8-9%/hr. So yes. WIFI may consume more power but should not be twice... unless WIFI unit ASUS using is some weird one.
The storage brand and Wifi units are usually something most companies don't put on their specifications so hard to tell whether ASUS tried to use really cheap ones there to keep the paper specs great, yet functionally not meeting up the expectations. Or ASUS may simply have yet to catch up software people. Whether truth or not I heard Samsung hired quite few programmers relatively recently. And compared to my old Galaxy Tab 10.1, I definitely see marked stability/smoothness improvement on the Galaxy note 10.1 which also uses ICS just like transformer infinity.
The most interesting comparison for infinity would probably be though Xperia S tablet. Because that one also uses 1GB RAM, and Tegra 3 (inferior to one in infinity) and runs ICS. So if ICS there is as stable as Galaxy Note, at least we know its not memory, its not tegra architecture. Though storage will still remain as potential source.
But going back to the subject, battery life on infinity on the contrary to some here stayting dock providing extra battery, I find not great. Even with docking station, it either barely matches up with that of Galaxy Note 10.1 tablet alone or perhaps less especially if you play games.

Hi
HoushaSen said:
Well many on this forum says its miscalculating, which may partly true but not entirely because as Battery drain was my concern on this system I did multiple trial and basically WIFI on with active browsing crank up the drainage to 20%/hr from 10%/hr without browser i.e. WIFI on but just reading ebook. So WIFI is truly consuming battery.
On my Galaxy Note 10.1, whether actively browsing or not the battery drain still remains 8-9%/hr. So yes. WIFI may consume more power but should not be twice... unless WIFI unit ASUS using is some weird one.
The storage brand and Wifi units are usually something most companies don't put on their specifications so hard to tell whether ASUS tried to use really cheap ones there to keep the paper specs great, yet functionally not meeting up the expectations. Or ASUS may simply have yet to catch up software people. Whether truth or not I heard Samsung hired quite few programmers relatively recently. And compared to my old Galaxy Tab 10.1, I definitely see marked stability/smoothness improvement on the Galaxy note 10.1 which also uses ICS just like transformer infinity.
The most interesting comparison for infinity would probably be though Xperia S tablet. Because that one also uses 1GB RAM, and Tegra 3 (inferior to one in infinity) and runs ICS. So if ICS there is as stable as Galaxy Note, at least we know its not memory, its not tegra architecture. Though storage will still remain as potential source.
But going back to the subject, battery life on infinity on the contrary to some here stayting dock providing extra battery, I find not great. Even with docking station, it either barely matches up with that of Galaxy Note 10.1 tablet alone or perhaps less especially if you play games.
Click to expand...
Click to collapse
I think in the TF700 they are using a Broadcom SoC for Wi-Fi, what ever it is though, drivers will be provided and it isn't much different to plugging in a Wi-Fi stick to a USB port. Perhaps they have configured it wrongly or there is a hardware error or software reporting error with the Wi-Fi. I can understand why people say it is a software reporting error as most people acknowledge it should never be that high as a percentage of power use so don't believe the figures. If they are the correct figures for Wi-Fi usage then something is very wrong somewhere.
Regards
Phil

I've been having the same problem. Wifi really does seem to drain my tablet too. I usually turn it off as I use juice defender and it helps immensely but it is kind of ridiculous for wifi to eat so much, especially when I want to start using the internet.