[Q] Battery Math - HTC Sensation

Hey all, been on the forums a long time without much in the way of posting, but thought I would share some numbers with you all to see if others are in the same boat...
I love the Sensation, but I am highly looking forward to S-Off and rooting to get rid of Sense (Sure it's cool, but it's not THAT cool). However, I don't think that custom ROMs will help with my battery, as the major (read HOLY COW) drain on my MAh is from the Screen.
Currently:
Battery Level: 80%
Time on Battery: 3h 40m 41s
Display on: 48m 28s
Percent of Drain:
Display: 80%
Cell Standby: 8% (Time on: 3h 40m, W/out Signal = 16%)
Phone Idle: 6% (2h 51m 13s)
Wi-Fi: 4% (1h 25m 45s)
Voice Calls: 3% (50 seconds)
This is a pretty standard breakdown of my phone on a normal day by lunch.
The math itself becomes pretty easy:
Display = 80% of 20% = 16% of the battery over the course of 48 minutes (rounded down for easy math).
This means that every 3 minutes the display is on, I drop 1% of battery. That is 5mAH per minute. Mind you, this is with brightness set at 0%... When backlight is on at 100%, it goes to about 1% drop in every 2 minutes. (Unless I'm actually doing something and then i can drop almost 1%/minute)
This means to me that, if you are doing NOTHING on your phone, but have the screen turned on with 0% backlight, you will get 300 minutes, or 5 hours. That doesn't seem so bad, but if you are actually doing something on your phone (watching video, using any of the radios, etc.), you will get between 1-3 hours of usage.
This seems a little insane to me, as I am able to watch more than two full length feature films on my iPod Touch before the battery is anywhere NEAR drained.
How do these numbers stack up with what you all have experienced.
P.S. I know there are other battery discussions, but they all seem to be centered on extending battery life, which this is not. It is a simple discussion of the displays drain.

There's a problem: Your computing with 101% total Just kidding. I don't think the measurements are very accurate. For example, it showed me that 3% of my battery drain was due to the Dice application. Well, I rolled the dice about 3 times. Should not exactly drain that much... Now let me show you some other math: The Sensation battery has 1580 mah. There are various tools that will show you the current drain in ma. Dividing mah by ma leaves you with h, i.e. hours. Yesterday, I did the following: Turned on Wifi Access Point, Bluetooth, GPS, Mobile data connection, Music player, display @ max brightness and LED flash, plus me swiping the homescreens around for some time. The drain reached a peak of 900 ma. You will find 1580 / 900 = 1.75 which is already close to 2 hours for which you could do such funny things When watching a video, your power consumption will be much less (The flahs alone is like ~200 ma). I think you will get 4-5 hours with a moderate brightness setting and headphones if you're not streaming over WiFi or something. Try it out and tell us!

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 :\

[Q] Main culprit of Battery Use?

My Nexus S 4G always says that the display is using the most battery. What do y'alls say?
I would hope the display is the most.... if it wasn't you would have a really nasty misbehaving process!
Mine states the following FYI:
7h 45m 30s on battery
28% - Display
27% - Voice Calls
14% - Android system
12% - Cell standby
4% - Phone idle
The rest is 2-3% misc stuff, and by battery is currently @ 66%. I run CM7 w/ matrix kernel @ 1.2GHz and smartass governor
Whoa.. You're lucky.. My display eats up 40-55% of my battery, and that's with the lowest brightness setting. I'm using the SC-LCD version though, if that matters. And I do play with it quite a lot, so I expect the uptime on the display to be quite high.
Still manages to last a day, though, even with an hour of hurling birds and feeding frogs, plus Plume-ing scattered throughout the day.
My Optimus One's display only used to eat 11-17% of battery, though, so there's that. (The Android OS was around 30-40% OTOH..)
Okay, enough about old flames
Bottomline is, it's fine
It varies on the day. I've seen days where I make no phone calls (unlike today) and display is 50+%
What are the max temps you ever got? I get up to 41C when playing some intesive games, brightness set to lowest when in dark enviroments. Is this normal or too much?
Usually I get 40-45% display (LCD). Today after some flight travelling I had 20% display, 35% music and 10% calls.
So everyone worried about 50-65% display use, this is totally normal if you play games, surf the web, do anything where the display is not turned off.

mA standby Sensation XE

I have a long experience with custom ROMs on my HD2 were the battery drain during standby is a real checkpoint, usually being around 4 mA.
Having wifi on (never sleep), sync on (2 email accounts - refresh every 5 minutes on peek hours, fb acc and news reader with 27 topics to refresh every 1 hour), 20-40 minutes of call and about 20 minutes internet browsing with 4 mA batt drain in standby, the total autonomy of the battery was around 12-14 hours.
Now, I've got my first Android native phone: Sensation XE. Knowing that battery best performances arise after several charge-discharge cycles, I believe these days the battery will perform at maximum capacity.
What is intriguing me, is the standby battery drain: 120-350 mA. The good record was seen this morning (not charging over night): 32 mA.
Despite this "huge" drain the phone is up, 32% available after 24 heavy hours: 5 hours internet browsing, wifi on (never sleep), sync on (2 email accounts - refresh every 5 minutes on peek hours, fb acc and news reader with 27 topics to refresh every 1 hour) and 10 minutes of call.
The question is: Is there so important to have a low standby batt drain?
The HTC battery driver is horridly coded. It "sticks", it jumps, and I wouldn't even be surprised if the ma drain was severely off.
Until HTC (or a kernel dev) fixes the driver, take all ma readings with a grain of salt.
As for my evidence; battery monitor widget reported consistent 150-200ma drops, yet I was averaging over 18hrs of uptime, and these readings were idle readings. Just the math alone doesn't work out to fit the 1520mAh battery.
Sent from my HTC Sensation 4G using XDA App
geoffcorey said:
The HTC battery driver is horridly coded. It "sticks", it jumps, and I wouldn't even be surprised if the ma drain was severely off.
Until HTC (or a kernel dev) fixes the driver, take all ma readings with a grain of salt.
As for my evidence; battery monitor widget reported consistent 150-200ma drops, yet I was averaging over 18hrs of uptime, and these readings were idle readings. Just the math alone doesn't work out to fit the 1520mAh battery.
Sent from my HTC Sensation 4G using XDA App
Click to expand...
Click to collapse
Indeed. That's why I still use current widget only to view battery % and don't care anymore about mA drain as I don't want yet to change stock ROM and root my device (and change battery icon to a percet one).

My Battery stats

I am on CatyROM 2.0
My battery stats are:
current battery is: 33%
11h 13m 28s on battery
Voice Calls: 31% --> Time on: 12m 40s
Cell stand by: 30% --> Time on: 11h 13m 28s
Display: 18% --> Time on: 11m 9s (My display is at around 25% - not on auto display)
Phone idle: 12% --> Time on: 11h 2m 18s
Face book: 4% --> CPU usage: 55s, CPU foreground: 55s, stay awake: 5m 34s, GPS: 38s (2 hours after disconnecting the phone from charger, I signed out facebook, so these times are for first 2 hours only)
Android OS: 3% --> CPU usage: 2m 2s
These are my phone stats after I woke up today. As you can see I rarely used my phone after I disconnected my phone form charger. Is these stats or normal. Without using anything, my phone is dying in 15 hours. Is this expected?
My GPS, blue tooth and wifi are off. I am not at auto brightness, brightness is less than 30%.
My auto sync with Gmail is on.
My email app (yahoo) sync settings i changed to never. As per my knowledge, no other apps are running.
If is normal I will stop worrying about battery.. please advice...
Any one help me, whether these stats are normal or not?
15 hours is good. If you were on Froyo, I'd say that's phenomenal. GB definitely improved battery drain though.
The litmus test I use is if it lasts me all day without the need to charge, it's good enough.
Hope this helps.
jvanlew said:
15 hours is good. If you were on Froyo, I'd say that's phenomenal. GB definitely improved battery drain though.
The litmus test I use is if it lasts me all day without the need to charge, it's good enough.
Hope this helps.
Click to expand...
Click to collapse
I am on GB. and during this 11 hours, I rarely used the phone. once to check gmail, and once to logoff facebook, other than that, I didnt touched my phone. so my point is without using phone, 15 hours battery time is good?
Your cell standby % being so big indicates that, your phone is struggling to get service.
I am also on caty. If I leave my phone at 100% and fall asleep I will wake up 8 hours later and about 10% will drain.
In contrast, when I'm at work, I get no service. I work in a kitchen and the walls are pure steel. When I leave after a 12 hour shift my cell standby is ridiculous.
BadFishCM said:
Your cell standby % being so big indicates that, your phone is struggling to get service.
I am also on caty. If I leave my phone at 100% and fall asleep I will wake up 8 hours later and about 10% will drain.
In contrast, when I'm at work, I get no service. I work in a kitchen and the walls are pure steel. When I leave after a 12 hour shift my cell standby is ridiculous.
Click to expand...
Click to collapse
So you mean to say that, I dont have enough signal at home, and its keep on trying to get the signal, so thats why my battery is draining fast?
if so what should I do? like if i switch of 3G, it will stop searching for 3G signal, but still i can get the phone calls?
and how can I make sure that, i am having signal fluctuations at home?
atrix4nag said:
So you mean to say that, I dont have enough signal at home, and its keep on trying to get the signal, so thats why my battery is draining fast?
if so what should I do? like if i switch of 3G, it will stop searching for 3G signal, but still i can get the phone calls?
and how can I make sure that, i am having signal fluctuations at home?
Click to expand...
Click to collapse
Check something for me, click on cell standby next time and tell me how long it says under "time without signal". That should help narrow down the issue.
No matter what though your cell standby shouldn't be that big.
If you turn 3g off you should still be able to receive texts/calls.
BadFishCM said:
Check something for me, click on cell standby next time and tell me how long it says under "time without signal". That should help narrow down the issue.
No matter what though your cell standby shouldn't be that big.
If you turn 3g off you should still be able to receive texts/calls.
Click to expand...
Click to collapse
ok, I will check these details tonite..
Yea that's high...I'm on my rom also and my cell standby is %5.... after 11 hrs %13 of the time without signal....
Sent from my SAMSUNG-SGH-I997 using xda premium
this seem to be fine :S.
but what helped me a lot
its advance task killer
and if your phone is rooted get set cpu
amazing apps that can help you with your battery
android2.0 said:
this seem to be fine :S.
but what helped me a lot
its advance task killer
and if your phone is rooted get set cpu
amazing apps that can help you with your battery
Click to expand...
Click to collapse
Try advanced task manager. Works better if your in froyo or gingerbread. Anyway, I don't know if I need to do this or not but I will reset my battery stats every once in awhile to help with battery life.
Sent from my SAMSUNG-SGH-I997 using xda premium
Just thought I'd chime in here but, most task killers from the market are pretty pointless. They can actually make things worse especially if your constantly FCing apps. Android has a built in task killer which means your running two task killers if you have a third party one. If your rooted use Juice Defender for slight batt life gains.
Also the battery in our Infuses don't need to have battery stats reset, just pull your battery and reinsert.
People look for some kind of miracle app when in all reality, Android OS/devs already have optimized the system to be pretty conservative while also maintaining a stable system.
I got the issue..
Problem is with Microcell (ATT signal booster).
I dont know exactly whats the reason, but this is what I have done yesterday..
can some one confirm this, who has a Microcell or my microcell may be buggy..
yesterday I fully charged the phone, within 30 mins i lost 5% battery without much use..
Switched of my microcell..
My current battery is: 41%
and phone on battery is 15h 4m 34s..
voice calls 1h 10m 34s
display 1h 1m 1s
i am pretty satisfied..
I'm on CatyRom 2.0 also, I'm on 21 hrs at 37% battery. Light/medium use. What I've really found makes a difference is to turn location services and GPS off. I leave the Wifi on but it only turns on when the phone screen is on. (menu button>advanced in Wireless Settings). Before I was getting 40% drain overnight sometimes. Now about 5-8% overnight (6 hrs).
EDIT: And use the built-in task killer.
Todays stats
current battery: 15%
time since unplugged: 1d 1h 35m
Cell stand by: 50% (time on: 1d 1h 35m)
phone idle: 20% (time: 1d 1h 19m)
Display: 12% (time: 15m 40s)
Android OS: 4% (CPU Usage: 4m 21s)
Facebook: 4% (CPU Usage: 45s, CPU foreground: 45s. Stay awake: 7m43s)
Android System: 2% (CPU Usage: 25s, CPU foreground: 22s, stay awake: 1m 29s, Data sent: 744 bytes, Data received: 30.9 Kb)
Google Search: 2% (CPU Usage: 12s, CPU foreground: 0s, stay awake: 3m 58s)
GMail: 2% (CPU Usage: 58s, CPU foreground: 58s, stay awake: 2m 48s)
google+: 5s (CPU Usage: 5s, stay awake: 2m 15s)
As you can see I rarely used my phone (16m in more than a day).
is these stats are fine, or still some thing eating my battery?

Battery Problem

Hey Guys
i have a strange Problem
my last one plus one had a good battery life time but the sound buttons get brocken , so one plus change my mobile.
1 wekk ago i get my new phone, everything is working but the battery drain was very fast.
i decided to install blisspop with bueffola kernel tweaked it a little bit for battery saving and install BBS for wakelock detections.
I elimenate all the wakelocks that cause a fast battery drain and since that te battery drain in idle is minimal but when my mobile phone is on the battery drains 3% in 1 hour.
That's weird cause as i say i eliminate all the wakelocks that causes fast drains and use the phone most time for spotify and whatsapp.
And if i start to browse on the Internet the battery life drops even faster
So what can i do?
Am i do something wrong
or is the battery of this new phone crap and i'm so luckily to get a phone with a failiure battery?
Any suggestions would be nice and sorry for my bad english.
German or russian is better
on 50% battery i have something like 2h of screentime so i thing till 0% battery i will have 4h SOT and this is nothing (don't use the Phone much a saing above only whatsapp and spotify)
Well, to be honest, 13% in 4:30h is not "very fast" considering you had 30 minutes of screen time. Mine loses about 10% per 30 minutes of using the device, going by that there are only 3% unaccounted for which easily fit the 4h standby your device was in.
Anyway. In 4:20h of tracked time, you have 1h awake time of which you had 35min of screen time. The remaining 25 minutes can be split up in roughly 15min of AudioOutput and 10min for several wakelocks such as the proximity sensor doing stuff for 3 minutes, the phone doing stuff for 4 minutes, basically everything is accounted for. All in order I'd say.
What I spotted:
You are on Lollipop. Did you wipe after/before upgrading to Lollipop or did you dirty flash from CM11s?
Do you have the new Lollipop-compatible firmwares (they come with CM12) installed? Not sure they come with Blisspop.
BetterBatteryStats has the CPU sitting on 1500MHz for half an hour. Check whether you configured your system to stay at 1500MHz with screen on which of course would be crap, the CPU should idle at around 300MHz.
It seems you had the device shut-down and then booted. Booting up the device eats massive amounts of juice.
Android reckons 3 days of usage like that, what's not ok with that?
1. Yes i wiped it and don't dirty flash the rom befor i was going to lollipop
2. Not sure have the latest bissplop
3 Where can i check what i configured to stay at 1500MHZ , in the kernel settings?
4. i know i rebootet it once
5. The reckons of the 3 days is not true , it only affects if my device is staying in standy cause i lost nearly nothing (as you will see in the logs i posted in the spoiler.)
The first BBS log shows the Device fully charged at 100% with wifi and Mobile Data on. I left the Phone in standby for the night (8h) and i didn't lose any precent.
So after 8h standby i still have 100%
After 11 o'clock till now i used the Phone mostly for spotify , a few times Whatsapp and something like 30-50min for internet.
In the second BBS log you will see that i lost Bat.: -35%(88% to 53%) [4,5%/h] although the SOT time is only at something like 2h.
The SOT time of 4h would be total normally for me if my reckon of android would be 3 days cause this is the case on my lg g2.
Because i use the phone most of the really only for spotify.
So the main problem of my device is not the idle drain but the drain if the screen is on or spotify works in the background with screen of.
I hope that the BBS logs in the Attachment and the 3 pictures can help you.
Thanks for your help
Don't go by the sudden drop of battery percentage after staying in standby for a long time, eg. over night. The very subtle decline of the voltage over the course of the night is smoothed out and reported as 0% lost. Once you start using the device, and the change in voltage gets more noticeable, the situation is re-evaluated and the previous drop of 0% gets counted in and a sudden drop of several % over a short amount of time will occur. This is physics and by design.
As for the rest, I'm by no means a pro in reading BBS Logs but from what I see, yes you are on Lollipop firmwares/baseband so we're good. The device enters deep sleep just fine, excellent in fact. No major or irregular wakelocks seem to occur, perfect.
As for the daily usage log, I see 7:45h. Of which 4:10h in deep sleep and 3:35h awake, of which ~2h screen on and ~30min phone on. You lost 35% in that time, averages 4.5% per hour. This seems perfectly ok. This would translate to 7h awake time with 4h screen time. I seem to fail to see your problem.
Interestingly the frequency tops now at 1500MHz. Did you change something?
To take myself as an example, on my way to work, I lost 19% in roughly 45-50 minutes of playing ingress. I had about 45 minutes of screen time, GPS constantly active and of course constant data traffic. I arrived 2h ago, barely touched my device in those 2h and lost another 2%. This is more or less in line with your usage, 1-2% when sleeping, 4% when awake with screen off, ~20% with screen on. You're not happy? You reckon you had more on your previous device?
Thanks for reply and help
My goal is to have a few days with android e.g 2-3 days
SOT is not so important.
Important is that there is not hudge battery drain wenn i hear spotify cause it dosn't mather if the screen is on or off it drains hard
On my lg g2 it's not so hard
And no didn't change anything about 1500MHZ
Any suggestion ?
Greetings
EDIT:
Open the back cover of the Phone
The battery is bloated
Video and Pics attached
View My Video

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