JB battery trick - Asus Transformer TF700

I am quite surprised that I didn't find a thread about the new battery "performance" under Jelly Bean. I did now quite some test and I am now pretty certain that the better battery performance are mail of pychological nature. But first things first.
After I installed ghe JB update I did a cold boot and a fresh battery calibration.
I was positively surprised by the new battery performance. My device made under ICS between 4.5 and 5.5h on battery.
After the update everything seems to be much better. I could run almost 1h and lost only 10% battery.
I thought wow.
After various full cycles however I recognized that the changes are more of cosmetic nature. Asus or google seemed to have only changed the way the percentage is displayed, rather than really prolonged the battery life substancially.
Where in ICS the battery percentage was kind of linear to the time left, under JB it looks more like a hyperbal curve.
Here is what I measured (screen time) with continued surfing with JB
Bat% Time
100 0
90 1h
75 2.5h
50 3.5h
25 4.25h
1 5h
This is roughly the average of 5 sessions simply surfing and bewtween 12h-15h sleep time. Sometimes I get 5.5h sometimes less than 5h of screen time.
This is just a bit more than I had with ICS, but when ICS battery stats said I have 50% left, I had just about haft of the screentime left. I think the major difference is that JB has better battery saving in deep sleep, the rest is eye washing with stats to make us feel better.
That's at least my take away. Do you have similar experience?

Related

Again with the Battery

Is anyone that is having battery issues running Adao Task Manager and Battery Status Pro?
I just factory reset my phone and I got 24hours of batter life. About 8 standby but a good deal of texting, web, some calls and some you tube.
I installed Task Manager and Batter Status Pro last night and my battery this morning went down 15% in about 1hr.
I uninstalled these today and will post again but has anyone else seen big battery drain from these apps or does anyone that is having issues running something similar?
I have been playing with the battery for about a week now.
For me this phone runs pretty good during stand-by. I would have about 2-3% drop for a whole night (7 to 8 hrs), with Google (push), Twitter and weather syncing.
The problem is when you use it, it drops like crazy. When I read news or surf the web, it would drop 1% every 1 or 2 min.
This morning I read an ebook, with black background for about 30 min, it dropped about 3%.
So basically i think the screen, data connection, and non-black background are the ones that kill the battery.
Yea, I agree, the S-AMOLED screen in this thing is an energy hog. OLED's are supposed to be more energy efficient than typical LCD's but I'm just not seeing it. Whenever I look at battery usage stats it shows the display at 70-75% of battery usage. Thats ridiculous. I have until the 18th, but I'm quickly leaning towards returning this and just getting an iphone4. This phone is becoming more and more disappointing the longer I have it.
This morning I have been uplugged 4.75hrs and used 16% no battery monitor and no app killer. Basically done the same things I did yesterday. Some Bebbled,texting, email, phone calls .
I will update tomorrow with total hours battery life for today. Would be happy if I can replicate the 24hours I got the day before installing those apps.
I got like 45 hours of battery with moderate usage during the two days. Seems fine to me, I occasionally used system panel to monitor if anything was using high and constant CPU
This is pretty typical of a 1ghz phone My nexus would last a day of heavy usage, 2 days if i use it lightly. We need to wait for undervolted kernels to be developed xD
Also, it really helps if you disable 3G when you don't use it. This allows me to get 3-4 days of light usage out of my nexus. I haven't played with the Captivate long enough to know how much of a difference this makes on this phone though
when you guys refer to "stand by", what exactly do you mean? Just screen off/phone idle? The battery usage on my phone when I use it seems to be OK even if not amazing, but it continues to sap life from the battery when I'm using it at an alarming rate.
Standby is when the phone is idle/screen off/locked.
The display is definitely power hungry. Using the Power Control widget that comes installed definitely has helped with battery life. It will let you toggle WiFi, BT, GPS, Data Sync, and Brightness (at 3 levels). When I'm not using anyone of those, I turn it off. When I'm indoors, I'll set the brightness to the lowest level. I'm usually at my desk when I'm streaming music, so I'll have it plugged in.
derek4484 said:
Yea, I agree, the S-AMOLED screen in this thing is an energy hog. OLED's are supposed to be more energy efficient than typical LCD's but I'm just not seeing it. Whenever I look at battery usage stats it shows the display at 70-75% of battery usage. Thats ridiculous. I have until the 18th, but I'm quickly leaning towards returning this and just getting an iphone4. This phone is becoming more and more disappointing the longer I have it.
Click to expand...
Click to collapse
Actually they are more energy efficient on black screens, But screens with a lot of white in them suck battery bad.
alphadog00 said:
Actually they are more energy efficient on black screens, But screens with a lot of white in them suck battery bad.
Click to expand...
Click to collapse
This is true the white screens burn the battery etc. I just wanted to let everyone know what I did to make my battery last more that 24hrs.
First, read the Wiki guide and apply some of the battery saving tips.
Second, UNINSTALL a program called "gReader" created by noinnion. This program is a huge battery hog! At least it was for me.
Hope this helps.
Well I guess I am one of the "lucky ones" Im running a live wallpaper and have not run my battery down since the 1st day. Right now Im at 40% life and at 15 Hrs 30m since unplugged. This is with checking facebook, twitter, email, phone calls, internet browsing\video watching and following the steps for the GPS fix. The only thing I have done is install ATK on the phone, besides that its all stock.
One thing I know is a huge battery drain is Time without Service. Check that stat and see if you have anytime at all without service, if so, I am pointing to that as a major drain on the battery. I know currently I have 0% Time without signal, my fiancee however is usually in the 20+% range and her battery drains like many reports I have seen here (she has an EVO).....
Yesterday I only managed 16 hours. Web, Email, A bluetooth file transfer, short bit of gaming. I have about 5% of the cell standby time (26%) without signal. My girlfriend has the Aria which is running Android 2.1 also, has all sorts of widgets, haptic feedback on and can make it at least 24 hours. I get that it has a smaller screen but it is also an LCD. Shouldn't the Super Amoled be saving our battery some display consumption.
i get about 14 hours or so moderate usage and at the end of the day, i have about 35% left at night.
If you detail the "Display" usage in the battery usage details how many minutes has your screen been on? Mine says 1hour 2mins ...this is for 8 hours of running time. My display is using 50% of the battery (which is at 68% now).
W00t W00t today I have reached a new high 2 Days 6 hours and 29 minuts with 12% battery left.....
What I have found is keeping Wifi on while I am at work and home like almost doubled my battery life. Which is great that I can use Wifi all day and not drain the battery so fast like my Fuze. Right now been off charger since 7:30am and I have 84% left. Yesterday after 9 hours I was still over 50%. For me its better than any other smartphone I have owened.
I used manual brightness, (swipe notification bar), turn off GPS/BT. black wallpaper and set Wifi to never sleep. Also the power saving mode in settings is off for other reason and doesn't affect battery.
At 18% right now and it's been off the charger for about 30 hours. I noticed yesterday that while I was connected to wifi at home (with Y5 app), it was draining faster than when I was connected to 3g. Did some tested back and forth and JuicePlotter clearly had a noticeably steeper downward slope for when wifi was connected than when it was using 3g. Weird :\

Foyo update...Battery life shortened ?

Has anyone noticed their battery life seems shorter since the update ? I installed the official froyo update last night and it seems I'm running out of juice much quicker than before.
At first mine ran down faster. I ran it all the way down. Charged it. And ran it all the way down again and charged. It seems back to normal.
I didn't have any issues. Maybe you changed something else as well? Could always try a few recharge cycles and see if it stabilizes..
I was running the leaked 2.2 and I flashed to official 2.2. My battery life is almost double what it was. I can't complain one bit about battery life, although I have other gripes with the official Froyo release.
I'm with icepop on this one.. I was running the stock rogers rom pre-update and now with the official rogers 2.2 I'm getting at least double the use before having to charge again.
I'm having battery issues with the new stock Froyo. I lose a huge amount of juce when in standby. I thought I may have my widgets updating too often so I charged it up and put it into airplane mode last night. The phone lost about 1% per hour in airplane mode. IDK what is normal but that seems like a lot to me. I didn't have any apps running, except my alarm was set for the morning.
I have SystemPanel installed and my cpu load NEVER goes below 10 percent, even in airplane mode. I suspect this is a large part of the issue. In app history, system and system processes are always on the top of the list and are around 3% each. IDK what controls this or how to lower it. I would love some feedback from someone else with SystemPanel just to see how our numbers compare. Overall the battery life I'm experiencing is pretty terrible and a buddy of mine's Fascinate has much better battery life (hence something must be wrong somewhere). He and I were skiing all day over the weekend and when we got back to our cars, my phone was half dead and his had lost almost zero juice. This displeases me.
mine's was better actually. but i didnt stayon it for long
My initial results with 2.2 were very bad (10% drop per hour when idling). I reset the phone back to 2.1 then re-installed 2.2. This did not help. Now I did this again (2.1 then 2.2) but this time I have not re-installed my apps and have not rooted (yet). So far, battery life seems to be normal. I suspect that some of my applications might mis-behave when installed on 2.2. I am planning to add them slowly and watch the battery.
Not here, seems the same to me
Mine is terrible ! I don't know what it might have been on 2.1 as I upgraded fairly quickly. Essentially I charge all night and then disconnect from power at 6:30am and then by 4:30pm I'm out of juice (phone shuts off). Any ideas here? I'm not running anything extravegant (email only) and hardly make any calls.
Whenever you flash to a new ROM, wait for at least a week of normal usage before you judge the battery life. The reason is simple, your battery stats are reset after ROM flash and your new OS needs time to learn how your battery drains before it can give you accurate readings.
If you can't wait for that long, you need follow the battery calibration thread to force a manual calibration of the battery.
I'll give it a week and see how it is then. Definitely is draining much quicker now though. I think It acted similiarly when I first got the phone as well. If I recall correctly the batter life sucked when I first got it, but then a week or so seemed to get much better.
I did the manual battery recalibration (let it die, charge while off, turn on and bump charge...etc). Last night I lost about 2.5% of battery per hour while in standby. This seems improved since calibration but its still pretty terrible IMHO. Is this in line with the amount of drain other are getting or am I draining more than usual?
TheSopranos16 said:
I did the manual battery recalibration (let it die, charge while off, turn on and bump charge...etc). Last night I lost about 2.5% of battery per hour while in standby. This seems improved since calibration but its still pretty terrible IMHO. Is this in line with the amount of drain other are getting or am I draining more than usual?
Click to expand...
Click to collapse
Running stock since purchasing the Captivate back in August, and so far battery life actually seems to be routinely as good if not better than 2.1. I must admit I didn't use my phone a huge amount yesterday (except for about an hour plus of downloading a bunch of wallpapers off Zedge for some ungodly reason lol), and after 18 hours of the phone being on I was still over 50% battery life left. 2.5% in standby doesn't sound like all is well - you must have something running in the background or similar issue. I have a live background, sync 5 e-mail accounts (granted, only one of those is every 15 minutes - the others are every thirty minutes, every hour, and once a day on two of them), and with light use I am getting over 40 hours with 2.2 so far (about in line with 2.1, but seems maybe just a little better). Heavy use I am dropping more like to the 12 - 18 hour mark (heavy use for me means the screen on more than off, actively playing games or using apps, large amounts of texting, etc. Solid game playing I haven't figured out a drain yet, but on some games it seems like I can drop almost the whole battery in close to 10 hours). At your rate of 2.5% per hour in standby you would only make it forty hours without even using the phone. I have been using mine just a little this morning (FB check, logging in to one of the desktops at work remotely to make some changes, live background running, WiFi sleep policy is set to when screen is off, but to be honest that is about it) and I haven't moved off the 100% mark yet and the phone has been unplugged over an hour and a half.
All that said though, as other users have stated you might want to give it a little more time for the system to recalibrate the battery usage. I would definitely check your processor usage though regularly to see if anything seems 'off'. One thing that caused me problems was that my SNS service would be running but then would get stuck in a pattern of 'Restarting' - would drain my battery rapidly.
It has been said that bettery drain is not linear. First 5% goes real fast. So, you need to judget the average over a day of use, not first hour or so. I'm still in first week of ROM flashing. So I can't confirm anything yet.
See my battery stats recalibration steps here:
http://forum.xda-developers.com/showthread.php?t=765656
Also, TheYar has a great write-up on identifying battery drain issues here:
http://forum.xda-developers.com/showthread.php?t=806211

[Q] Battery life with firefly 2.3

I am getting a very short life out of my battery. I run firefly 2.3 and with everything off i am at 50% after about 4 hours. any ideas please.
Samsung Captivate
Firefly 2.3
speedmod k13b-500hz #54
I'm not too sure.
I almost get 1% a little bit less than an hour 45~50 mins at idle.
This is no data and nothing on.
But once wifi is on, it ate about 15~20% in under 30 mins. This is with browser open and msn
I suppose data would be around the same if not a bit less or more underload.
I suggest do all those things that increase battery life ppl suggest on the stickies.
4 hours doesn't meant much without more info. You can have your phone on for 3 hours and been surfing the net or playing games the whole time so I'd expect your battery to be nearly drained.
How long is your phone on for?
What % is the display using up your battery?
How long has your screen been on?
After display what's next for battery usage?
tric2009 said:
I am getting a very short life out of my battery. I run firefly 2.3 and with everything off i am at 50% after about 4 hours. any ideas please.
Samsung Captivate
Firefly 2.3
speedmod k13b-500hz #54
Click to expand...
Click to collapse
I would go through all the basics:
- Charge to 100%, wipe back to stock and do a fresh install
- Charge the battery to full again, do all the basics to get a legitimate read (plug/replug, wipe battery stats)
- Check your about phone settings and look at battery use, check for battery hogs.
- Check to see if you are in an area with poor signal. I lose signal if I'm indoors where I'm at so I turn the phone to flight mode. If I don't it eats about 15% of my battery an hour.
I get consistently good battery life with my captivate/FF2.3, so I'm betting it comes down to a faulty install or battery measures.
I've also noticed this after I upgraded to 2.3 (from stock Rogers captivate). My battery used to be at maybe 70% at the end of the day, now it is at 20%.
I just checked it, and it is reporting 93% after 2 hours. The display has only been on for 2 minutes but has used 48% of the battery.
I have the display set to the lowest setting, no gps, no wireless, limited background apps.
ok i turned everything off and put into flight mode and set the screen to turn off after 15 seconds brightness set to the lowest point on the slider and starting out at 99% on my battery, after letting it sit for exactly one hour with no use at all i turned it back on and it was at 83%. how did it eat 16% doing nothing. I also did like you said with the reflashing and clearing of the battery info and still get the same results. do you think it may be a bad battery.
tric2009 said:
I am getting a very short life out of my battery. I run firefly 2.3 and with everything off i am at 50% after about 4 hours. any ideas please.
Samsung Captivate
Firefly 2.3
speedmod k13b-500hz #54
Click to expand...
Click to collapse
I'm getting great battery life with Firefly 2.4(no mods added) with WiFi on 24/7...might wanna upgrade, it is so easy with the on-board download and upgrade built in!
I made the mistake of flashing when I wasn't at 100% battery not knowing how much of a pain it was to calibrate the damn thing. I did however realize that after a couple of full charge/discharge cycles my battery life improved. FF 2.4 seems to have better battery life, but I haven't had it on the phone long enough to say for sure.
KayvinM said:
I made the mistake of flashing when I wasn't at 100% battery not knowing how much of a pain it was to calibrate the damn thing. I did however realize that after a couple of full charge/discharge cycles my battery life improved. FF 2.4 seems to have better battery life, but I haven't had it on the phone long enough to say for sure.
Click to expand...
Click to collapse
My first charge on 2.4 never displayed "FULL" in the top left like I'm used to seeing. I bump charged just once and cleared stats. Still couldn't get that "FULL" up there.
That said, my batt lasted 2 full days on the charge with minimal usage (3 or 4 calls, a few short youtube videos, 4 or 5 rounds of Angry Birds, otherwise with display off sitting by my chair on my wifi).
That seems like ridiculous good standby to me... perhaps too good. I'm afraid I might be badly overcharging my battery, so I let it drain until it I couldn't turn it on and it's back on the charger. I'm hoping I'll see a "FULL" up there this time. On the other hand, I sure could get used to that kind of standby time...
There is a Q&A thread in the Q&A forums please use those instead of opening a new one.

Battery consumption

Is my battery life ok?
I think my battery is losing capacity or something is draining it a lot since few months ago i still could squeeze out of it about 3.5 hours screen on time, nowadays i get barely 2 hrs.
What also bugs me is that when i unplug it from the charger it loses top 10% very quickly. It goes from 99% to about 90% in just an hour or two in standby. Here are some screenshots, I don't see anything suspicious, still, I get less from it than before.
All screenshots are standby with everything shut, no sync, no internet on, nothing, it consumed 15% in about 9.5 hours and before, i got to lose about 1% in about 10 hours in standby.
Stock austrian rom 2.3.6. rooted.
Why are you still on GB?
lol. Because of the battery life and need fully working rom, but battery is very important to me. Tried stock ICS, after 2 weeks had to get back to GB cause of the battery.
Also, is there something wrong when battery monitor reports high kernel consumption? Sometimes in standby when there is more battery drain it shows high kernel consumption
More than 100 views and no comments.
Can you at least say is it normal for launcher to use about 10% of the battery? It's Holo launcher

Battery Drain in 2 Hours

I had this problem before I flashed the ROM, but that was several years ago so I can't compare between now and then, but it is clear that my device drains battery abnormally fast. I would say it lasts about 2.30 hours and it gets very hot over time.
To give a perspective, the miscellaneous battery drain went from 33% to 71%
Granted, I was installing new apps during that time, but I still don't see why it should drain so much, especially when it is miscellaneous that drains the most.
Buddy! You got a rom on there for just 4 hours! Way too soon to tell anything about battery usage and forget the on board battery statistics. Might as well read your coffee grounds...
Plus, tons of stuff is going on in the background after flashing a rom, indexing is one of them, AND Katshmallow is overclocked which makes the tablet run on the hot side anyway and eats battery. That's the price to pay for speed.....
Run it for a week, install Battery Battery Stats, maybe Wakelock Detector too, then we can talk about battery drain....

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