Android Forums 10 Hour Evo Battery Life: Graph of Battery Usage

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June 2nd, 2010, 02:37 AM   #1 (permalink)
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10 Hour Evo Battery Life: Graph of Battery Usage

We've seen a lot of people claim very different battery life for their Evo. I used to claim 8-9 hours, some guy claimed 61+ hours of battery life http://androidforums.com/tips-tricks-evo-4g/85497-tip-trick-61-hours-24-battery-remaining.html

I propose that we all post our battery life graph like the one I am about to post below. This way we can look at these claims in scrutiny, and perhaps figure out why it is that some people's Evos seem to last longer than others.

Here is a graph of my Evo's Battery Charge over 1 day:

Wake up at 7:30am to disconnect the charger, listen to Pandora on the car to work until I arrive at 8am. Idles until lunch time at 12pm. Use the Evo to read up on some news at lunch until 1:30pm. Listen to Pandora while working until 5pm. Drive home while listening to Pandora in the car. Battery starts giving warning indications while driving, and phone dies when I get home at 6pm.

Very usual day, and matches what the battery charge graph shows. The top apps of the day are:

System Processes contains mediaserver (2.4% due to Pandora), akmd (0.3% accelerometer polling), and everything else is <0.1%. As you can see I barely used my phone during the day for anything but Pandora.

So based on my data, I'd say that the normal battery life for the Evo is under 10 hours. My settings are: no 4g, no wifi, no bluetooth, yes gps, yes bckgrnd data, auto brightness, no live wallpaper, yes taskmanager (ATK, set to "safe" setting. Will probably get rid of this..), no friend stream, no flickr.

I'd love to see other people post up their Battery Usage graphs as well. The App used is "SystemPanel App / Task Manager", available for free in the market. Go into Settings and allow it to Monitor. The screenshots were made by ShootMe, also available in the market.

 Last edited by pingpongboss; June 2nd, 2010 at 09:38 AM.
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June 2nd, 2010, 02:44 AM   #2 (permalink)
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Nice idea. I will participate Friday morning

June 2nd, 2010, 02:50 AM   #3 (permalink)
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Quote:
 Originally Posted by freeza Nice idea. I will participate Friday morning

June 2nd, 2010, 03:05 AM   #4 (permalink)
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That is an incredibly badass program.
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June 2nd, 2010, 03:07 AM   #5 (permalink)
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Is this app already included on the Evo or would I need to grab it from the android market? I'd really like to try this when I get my Evo on fri. (yee! so excited)
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June 2nd, 2010, 03:19 AM   #6 (permalink)
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I can't wait until they come out w/ 3000mAh batteries w/ the extended door. I don't care how awkward and crazy they look. That thing will power it all day under 4G indefinitely.

June 2nd, 2010, 03:35 AM   #7 (permalink)
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Quote:
 Originally Posted by keyholeSecrets Is this app already included on the Evo or would I need to grab it from the android market? I'd really like to try this when I get my Evo on fri. (yee! so excited)
The apps are listed in the last paragraph of the OPs post, I missed it the first read through also:

Quote:
 Originally Posted by pingpongboss The App used is System Panel, available for free in the market. Go into Settings and allow it to Monitor. The screenshots were made by ShootMe, also available in the market.

Very nice breakdown ping. I'm interested in seeing other results and once I've gotten into a normal routine with the EVO I'll post some results as well.

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June 2nd, 2010, 03:53 AM   #8 (permalink)
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I did this yesterday. Tried to screenshot my chart but the included Sd card crapped out again while i was doing so ;(.

Basically after 10 hours of moderate out and about usage (texting, couple quick calls, push email, handful of pics, few videos, 10 minutes of charging while i transferred some stuff, and more i cant remember--(GPS< WIFI< 4G all off) I got about 10 hours by the time i went to sleep and still had 28% battery left. Prolly coulda got 11 or 12 out of it total. Not too shabby. But if you hammer it you can kill the battery in No time

June 2nd, 2010, 06:54 AM   #9 (permalink)
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Quote:
 Originally Posted by pingpongboss I'd love to see other people post up their Battery Usage graphs as well. The App used is System Panel, available for free in the market. Go into Settings and allow it to Monitor. The screenshots were made by ShootMe, also available in the market.
strange, I can't find it on AppBrain..

June 2nd, 2010, 07:21 AM   #10 (permalink)
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I love analytical software like this! I'll contribute too when I can.

...but part of me has to wonder how much battery is being consumed by having a such a service thread constantly running. :lol:

June 2nd, 2010, 07:30 AM   #11 (permalink)
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Quote:
 Originally Posted by skpd strange, I can't find it on AppBrain..
Me neither. Can someone post an AppBrain link?
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June 2nd, 2010, 09:37 AM   #12 (permalink)
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Quote:
 Originally Posted by skpd strange, I can't find it on AppBrain..
Quote:
 Originally Posted by esone1ll Me neither. Can someone post an AppBrain link?
Full name is "SystemPanel App / Task Manager". Here you go SystemPanel App / Task Manager - Android app on AppBrain

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June 2nd, 2010, 01:07 PM   #13 (permalink)
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Very cool app.
Plot started now at 42% battery since I didn't charge last night.

June 2nd, 2010, 05:05 PM   #14 (permalink)
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Pingpongboss,

From your screenshots I see you have two bars, and three bars of reception out of five. Transmitting power is a huge battery drain, so your proximity to a tower will radically alter your mileage. It would be nice if we could somehow include reception bars in our usage graphs.

June 2nd, 2010, 05:08 PM   #15 (permalink)
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Quote:
 Originally Posted by ChristmasLights From your screenshots I see you have two bars, and three bars of reception out of five. Transmitting power is a huge battery drain, so your proximity to a tower will radically alter your mileage. It would be nice if we could somehow include reception bars in our usage graphs.
Actually, 3-4 bars out of 6, but that's not important. At work (8am-5pm) I always have full bars of reception. But still it does not seem to drain less battery than at home.

June 2nd, 2010, 06:04 PM   #16 (permalink)
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Quote:
 Originally Posted by robertdahlgren Very cool app. Plot started now at 42% battery since I didn't charge last night.
Just be careful with the widget it's a big red x that will kill all apps running on the phone...

June 2nd, 2010, 07:02 PM   #17 (permalink)
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Couple of observations:
- Autobrightness is a killer on my hero. I shut that off and saw immediate battery life increases.
- Apps that are constantly running like task killers and battery graphs also hit the battery. I used to run a battery profiler until I realized how much battery it consumed after killing it for a few days.
- Wonder why your CPU spends so much time around 20%? It looks like from around 12-6pm your CPU averaged around 20%. That cannot be good for battery life.

Would you be willing to turn off the task killer, battery profiler, autobrightness, and report your findings?
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June 2nd, 2010, 08:03 PM   #18 (permalink)
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Quote:
 Originally Posted by jmxp69 Couple of observations: - Autobrightness is a killer on my hero. I shut that off and saw immediate battery life increases. - Apps that are constantly running like task killers and battery graphs also hit the battery. I used to run a battery profiler until I realized how much battery it consumed after killing it for a few days. - Wonder why your CPU spends so much time around 20%? It looks like from around 12-6pm your CPU averaged around 20%. That cannot be good for battery life. Would you be willing to turn off the task killer, battery profiler, autobrightness, and report your findings?
Good idea I'll do this for tomorrow's test. I think that's Pandora using the CPU.

Today my Evo's battery is lasting way longer than yesterday. I'm not sure why. This is the longest it's ever lasted:

It's 6pm right now, and usually the battery should be dying. But it's still got a good 60% right now. The only difference from yesterday is that I didn't listen to Pandora in the afternoon. I wonder if Pandora affects the battery life that much...

mediaserver leads at 0.4% under System Processes. I'll update when this battery dies.

June 2nd, 2010, 10:33 PM   #19 (permalink)
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I think the hint is in your CPU usage. Notice the CPU graph: It only momentarily peaked above 10% for a short period compared to 30% for a sustained period.

June 3rd, 2010, 01:19 AM   #20 (permalink)
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Honestly, I vote against Pandora on our phones until they optimize it for android. Lastfm works hella better.

June 3rd, 2010, 02:23 AM   #21 (permalink)
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Off topic: any opinions on Slacker?

June 3rd, 2010, 03:35 AM   #22 (permalink)
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Quote:
 Originally Posted by bodu Off topic: any opinions on Slacker?
Hmm the reason I stuck with Pandora is because on my Moto Droid slacker wouldn't let me log in no matter what, and Last.fm would consistently crash the whole phone after streaming for 30 minutes.

June 3rd, 2010, 03:36 AM   #23 (permalink)
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What's wrong with Pandora now? I like both Pandora and Last.fm, but personally I feel like Pandora tends to pick better choices of songs based on your artists, not always, but for the most part.

Another thing is, from what I've read, Last.fm does not offer a higher quality setting, with them you're stuck at 128 kbps which is just ok, but with Pandora, you can set the quality to 192kbps.

June 3rd, 2010, 03:52 AM   #24 (permalink)
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Yea I kind of abandoned the graph for my 2nd day battery test because Root came out. going to do another graph tmr

June 3rd, 2010, 12:46 PM   #25 (permalink)
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almost a full 24 hour plot

Here's a plot of 23 hours. This was a lower than normal usage day with a few phone calls in and out, lots of email, a fair bit of web browsing, a couple youtube videos, but no extended data session on 4G or 3G while out.

Normally this type of day wouldn't use a close to a full battery for me but in this 24 hours I went from 40% to 15% charge to 98% back down to 40% so essentially a full battery drain.

Gaps in data:
The two day-time gaps were while playing sports (hence the lower than normal usage day).
I shut off monitor recording but did not power off the phone or charge overnight for the 8 hour nighttime gap. Recording seems to be taking a decent chunk off battery life as I haven't been using a full battery up in 24 hours unless I have an extended GPS or 4G sessions (or mobile hotspot usage) while out and about. It looks like the idle usage was substantially lower with recording off based on battery consumption over those 8 hours versus the day-time idle periods.

Auto-brightness off (medium and high manual settings used while indoors / outdoors)
GPS off except when using maps
Bluetooth off except when driving and making / taking a couple phone calls
ATK used to clean up
Off wi-fi on 3G during day-time idle periods plus gaps around them.

Time to go root now. Should be entertaining to take a rooted Evo into the local sprint store to look at accessories tomorrow.

 Last edited by robertdahlgren; June 3rd, 2010 at 12:49 PM. Reason: bigger first picture
June 3rd, 2010, 12:57 PM   #26 (permalink)
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Can you post an update and screenshot when the battery reaches 0%? I wonder how long it'll last.

June 3rd, 2010, 02:04 PM   #27 (permalink)
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Did you cycle your battery correctly? I think you are seeing the longer cycles because your battery is getting broken in.
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June 3rd, 2010, 02:14 PM   #28 (permalink)
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Quote:
 Originally Posted by bmwboyee Did you cycle your battery correctly? I think you are seeing the longer cycles because your battery is getting broken in.
Are you asking me? I've had my Evo for 2 weeks now, I doubt the battery still needs more "breaking in"

June 4th, 2010, 03:47 AM   #29 (permalink)
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Quote:
 Originally Posted by robertdahlgren Normally this type of day wouldn't use a close to a full battery for me but in this 24 hours I went from 40% to 15% charge to 98% back down to 40% so essentially a full battery drain. Gaps in data: I shut off monitor recording but did not power off the phone or charge overnight for the 8 hour nighttime gap. Recording seems to be taking a decent chunk off battery life as I haven't been using a full battery up in 24 hours unless I have an extended GPS or 4G sessions (or mobile hotspot usage) while out and about. It looks like the idle usage was substantially lower with recording off based on battery consumption over those 8 hours versus the day-time idle periods. Auto-brightness off (medium and high manual settings used while indoors / outdoors) GPS off except when using maps Bluetooth off except when driving and making / taking a couple phone calls ATK used to clean up Off wi-fi on 3G during day-time idle periods plus gaps around them.
Still suggest you kill ATK and as previously suggested, run the battery all the way down. Run the battery down to see how much time you gain below 15%.

Some batteries (I have the stock 1500, Andida, and Mugen) have different discharge profiles. ie They'll hang above 40% forever then drop like rocks (Andida), or they'll show consistent discharge (stock), or they'll drop rapidly to 50% and coast the rest of the day (Mugen).

Either way, if you're getting through most of the day above 40%, I consider that a win. Thanks for sharing and testing.

June 4th, 2010, 09:26 AM   #30 (permalink)
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Here's my "yesterday" submission. It was an odd day for me. I spent about 25% of the day in an inside lab where I had no cell reception. This kills battery life as the damn radio keeps trying to connect. This happened in the morning which is why I went from 100% (can't see it) to 70% in about four hours. Anyway, even from 12-24h I only went from about 70% to 10% and you can see I beat on the CPU at times. Will post every few days to see how this goes. It's really pretty good, in my opinion. I've experienced worse battery life in other smartphones I've had, recently.

 Last edited by dzar; June 4th, 2010 at 09:29 AM. Reason: Inline picture
June 4th, 2010, 10:26 AM   #31 (permalink)
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Quote:
 Originally Posted by dzar Here's my "yesterday" submission. It was an odd day for me. I spent about 25% of the day in an inside lab where I had no cell reception. This kills battery life as the damn radio keeps trying to connect. This happened in the morning which is why I went from 100% (can't see it) to 70% in about four hours. Anyway, even from 12-24h I only went from about 70% to 10% and you can see I beat on the CPU at times. Will post every few days to see how this goes. It's really pretty good, in my opinion. I've experienced worse battery life in other smartphones I've had, recently.
Wow 16 hour battery life. That's pretty good

June 5th, 2010, 02:28 AM   #32 (permalink)
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Wow I managed to get my own 16+ hours of battery life. The black block in the middle is when I forgot to turn Monitoring on.

This is right after I rooted (and wiped) my Evo. So some app must've been going crazy to cause the 10 hour battery life.

June 5th, 2010, 05:34 AM   #33 (permalink)
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I am super new to android so I am hoping you all can help...

I checked my Battery Usage and the screen say 98% to Apps and 2% to cell stand by. Is this normal? If not, what should I do?

Thanks for the help in advance!

June 5th, 2010, 12:06 PM   #34 (permalink)
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Quote:
 Originally Posted by metchick01 I am super new to android so I am hoping you all can help... I checked my Battery Usage and the screen say 98% to Apps and 2% to cell stand by. Is this normal? If not, what should I do? Thanks for the help in advance!
Hmm not normal. Did you just unplugged the charger? That might explain why.

June 5th, 2010, 04:44 PM   #35 (permalink)
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No. It now says 96% Android system 2%cell stand by and 2% phone idle

June 6th, 2010, 03:55 AM   #36 (permalink)
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Quote:
 Originally Posted by metchick01 No. It now says 96% Android system 2%cell stand by and 2% phone idle
Still not normal... Get the Spare Parts app from the Market and look inside Battery History. See if you can find what is causing Android system to go crazy.

June 6th, 2010, 10:57 PM   #37 (permalink)
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Quote:
 Originally Posted by metchick01 No. It now says 96% Android system 2%cell stand by and 2% phone idle
that's because you just took it off of the charger.

June 7th, 2010, 08:59 AM   #38 (permalink)
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Another day... Not shown but I started at about 7 a.m. That's 17+ hours and I had 4G and bluetooth on all day (note that bluetooth is a dog when the phone is not in standby... it was unpaired almost all of this day which I also think matters). I only get 3G at my office which is where I took this screen shot and I've turned bluetooth off, now, also. Today I see how far I can go... I'm going to push it!

June 7th, 2010, 09:13 AM   #39 (permalink)
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Quote:
 Originally Posted by dzar Another day... Not shown but I started at about 7 a.m. That's 17+ hours and I had 4G and bluetooth on all day (note that bluetooth is a dog when the phone is not in standby... it was unpaired almost all of this day which I also think matters). I only get 3G at my office which is where I took this screen shot and I've turned bluetooth off, now, also. Today I see how far I can go... I'm going to push it!
Pretty good considering the CPUs keeps hovering between 10-30%

June 8th, 2010, 10:54 AM   #40 (permalink)
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ill give this a try today. For some reason my CPU was at 100% running at 1ghz when i started the app. ill do a full days test tomorr and play with app today.

June 10th, 2010, 07:40 AM   #41 (permalink)
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Great thread. I followed some advice from that link you posted a few days ago. I've now installed the SystemPanel app and have it monitoring today. Yesterday was really my first full day without a task killer app running. Un-plugged from charger around 6:45am and, when I was going to bed at midnight, it was at 7%. So, it got me through the day. I was more concerned with it lasting without a task killer. Given all the debate around it, I'm now going the route without it.

Again, THANKS for the thread. Good stuff!

June 10th, 2010, 07:46 AM   #42 (permalink)
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I will post graphs later, but I had 16+ hours of use and over 30% battery left when I plugged in last night. I've seen 16+ hours but only 5% or so left in the past. The big difference, yesterday, was I had very good cellular signal all day. Turns out my office is a bit on the low side so when I'm at work I spend a good amount of time with 1-2 bars, only. Seems that's the big "sucker" as I used GPS (a bit), some 4G, Bluetooth and several voice calls along with email and web work. I didn't try to conserve battery and it's doing just fine.

June 10th, 2010, 02:51 PM   #43 (permalink)
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Battery = Not so hot today. :-(

I'm actually getting bad battery performance today compared to yesterday. Only thing different is the monitoring. I haven't really used it any more or less. Maybe a little more web browsing, but nothing significant.

I'll repost late once I hit the red just to compare.
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 Last edited by Zippydo; June 10th, 2010 at 02:55 PM.
June 10th, 2010, 03:14 PM   #44 (permalink)
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Quote:
 Originally Posted by Zippydo I'm actually getting bad battery performance today compared to yesterday. Only thing different is the monitoring. I haven't really used it any more or less. Maybe a little more web browsing, but nothing significant. I'll repost late once I hit the red just to compare.
Looks like something is running 30% cpu time in the background... Is see GPS is on... do you have mapping or something running? I've had things running in the background that had no business doing so and that killed the battery. Keep CPU low and you're home free

June 10th, 2010, 03:22 PM   #45 (permalink)
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Quote:
 Originally Posted by dzar Looks like something is running 30% cpu time in the background... Is see GPS is on... do you have mapping or something running? I've had things running in the background that had no business doing so and that killed the battery. Keep CPU low and you're home free
GPS is running, but it was yesterday too. I havent launched anything crazy needing it and have the weather widget polling at 3 hour intervals. Ill see how the rest of the evening goes. I made it to midnight last with 7% left. Ill check the running apps CPU use later too. :-)

June 10th, 2010, 08:41 PM   #46 (permalink)
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 Originally Posted by metchick01 I am super new to android so I am hoping you all can help... I checked my Battery Usage and the screen say 98% to Apps and 2% to cell stand by. Is this normal? If not, what should I do? Thanks for the help in advance!
I also have this. And I havent had it on a charger all day.

June 10th, 2010, 10:31 PM   #47 (permalink)
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Well I ended up putting the phone on the charger while I took a 20 minute nap. Battery charged up to almost 62% in that time frame (odd IMO, yours?)

While I was teaching my Zumba class, CPU usage was actually really low. I then went on a bike ride with SportyPal running. CPU was at 100% for almost 40 minutes (ouch).

What do you guys think? Is there anything running here that may be out of sorts or is it pretty normal. My high usage earlier in the day may have just been caused by me going in and checking stats in SystemPanel maybe. I'm bad and fidgety with leaving new apps alone.
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June 10th, 2010, 10:46 PM   #48 (permalink)
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Quote:
 Originally Posted by Zippydo ...I then went on a bike ride with SportyPal running. CPU was at 100% for almost 40 minutes (ouch).
If you look, SportyPal used 40 min of CPU! It ran your phone at full power the entire time. I'd check with those folks to see why. Maybe that's what it does, in which case you better charge up before a ride and not go more than about 2-3 hours at a time.

SystemPanel is not a hog... I use it all day long to track stuff as I'm learning.

June 10th, 2010, 10:48 PM   #49 (permalink)
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Yeah. SportyPal uses GPS and Google Maps to track your workout. So yeah, GPS and 3G data all at once is going to chew the battery like it was just an appetizer.

It's stated it's a hog so I did expect that. I also wanted to test it analytical software just to see.

June 10th, 2010, 10:53 PM   #50 (permalink)
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Here is my history, today... after about 16 hours I'm at 30% battery life, left. Today I did 10-15 minutes of GPSing, a 1-hour phone call (with 2-3 bars, at most) and some Google mapping aside from my usual email reading/sending. I'm happy.

The droupout around 9 a.m. is when I was moving my I/O phone over to my account and there was a power cycle before the update.

 Tags battery usage, graph, htc evo 4g

 Android Forums 10 Hour Evo Battery Life: Graph of Battery Usage