Because of an issue unrelated to stability I have been watching my history in Battery Monitor Widget very closely. I do have some instability from time to time, 2-3 spontaneous reboots since I got the phone. I have had one spontaneous reboot and a couple FC incidences with GOF2 while watching BMW history. BMW history includes the battery temperature. I noticed that at all of these times the battery temperature started to spike several minutes before the instability. Typically it sits around 23°C while completely idle and around 30°C while being used. Going back and looking at the logs I can see that it would raise to around 42°C and that is when the phone starts to get unstable or reboot entirely. Each of the times I saw that it did this, it started to raise and in about 5 minutes it was high enough to cause the instability that made me look at it. In one case the Ma draw was very high (900+) though the others it was normal, in-use draw (100-200).
I am no expert in this and really this brings up more questions than answers for me than anything. Is heat causing instability or is instability causing heat? Is the battery getting hot or is some other component getting hot and heating up the battery? Is it even related?
I just wanted to post this observation in hopes that others can maybe scrutinize what is happening at the time that they are experiencing instability or reboots.
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Today when I woke up, the battery was 40%. Not TOO strange (I am not very sure how much I left it last night) but strange.
That is not the problem though. The problem is that 3 minutes later while I was playing some backgammon on the device (don't ask), the power was already 37%.
Since daylight savings today, must have confused a couple of apps in my device (notably Klaxon - will post in its thread for that), while I was playing klaxon I got some delays so what do we do? Soft reset of course.
This is where the strange thing happened... After soft reset, just a few minutes after the 40%... I got... 23%!
Anybody noticed something like that?
I usually don't let my batter go so low (li-ion batteries don't like low numbers), so I don't know if this is a known issue.
This is a common problem, check out the other battery threads. The battery maagement on this device is a little suspect. A soft reset usually results in a different battery level - some people including me sometimes find chargin stops around 87% however a soft reset will give 100%.
Hopefully a new rom update will provide better drivers.......but only if people are telling htc about it.
A full discharge in every 20 charge cycles is recomended as posted in other threads, in order to calibrate the battery indicator.
ok thanks man
That capping at 87% thing happens on my Elfin. When I softreset, it's 100%. Though it doesn't always happen.
It would seem that looking at my Battery Moniter I would get random spikes that send the (mA) into the 900's. Then slowly begin to drop after watching it for about 10 minutes where it starts off at 2(mA) for about an hour and a half. I'm not sure if its the 4g kicking in or not but Juice Defender should be stopping the 4g while the phone is off.
If I could get some input on what would cause such a spike then I would have an above average battery to last throughout the day.
Zspy1985 said:
It would seem that looking at my Battery Moniter I would get random spikes that send the (mA) into the 900's. Then slowly begin to drop after watching it for about 10 minutes where it starts off at 2(mA) for about an hour and a half. I'm not sure if its the 4g kicking in or not but Juice Defender should be stopping the 4g while the phone is off.
If I could get some input on what would cause such a spike then I would have an above average battery to last throughout the day.
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I am kinda curious about this too. I don't personally have this problem but i read on one of the forums(outside of xda) that it was either a radio tower switch (back and forth between 2G and 3G/4G) or a loop in the actual programing.
Until the battery drivers are fixed none of the numbers reported will be very accurate.
Next time you think it is spiking to 900 or a high number try using a task killer and kill the battery monitor widget and then restart it...anytime I do that it then displays back down to 2mA.
...so to make a long story short dont trust anything it is telling you. The only accurate guage is physically how long the phone runs before it turns off.
After logging the temperature for a few days I've noticed a direct correlation between phone temperature and battery life. The phone drains 1% every 3-4 minutes when its at or above 35. when its around 27° or lower it only drains about 5% per hour... I'm having an issue however. Today my phone was extremely hot. Right under 40° all day... with the screen off 90% of the time. Tonight I'm doing a test I've removed the back cover and its nowhere close to as hot as it was.before. I'm starting to think the battery cover is too close to the battery and internals thus causing overheating issues. I love this phone but I may try to swap it out for another while I still can. Has anyone else noticed similar issues? I'm underclocked at 800mhz screen brightness 10%. Does at&t charge a restocking fee if I return it?
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jthornton71707 said:
After logging the temperature for a few days I've noticed a direct correlation between phone temperature and battery life. The phone drains 1% every 3-4 minutes when its at or above 35. when its around 27° or lower it only drains about 5% per hour... I'm having an issue however. Today my phone was extremely hot. Right under 40° all day... with the screen off 90% of the time. Tonight I'm doing a test I've removed the back cover and its nowhere close to as hot as it was.before. I'm starting to think the battery cover is too close to the battery and internals thus causing overheating issues. I love this phone but I may try to swap it out for another while I still can. Has anyone else noticed similar issues? I'm underclocked at 800mhz screen brightness 10%. Does at&t charge a restocking fee if I return it?
Sent from my SAMSUNG-SGH-I997 using XDA Premium App
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Click to collapse
well there must be a big current draw for it too get hot. android has a bug that shows up occasionally where the radio consumes large amounts of power. also 2.3.3 has a similar bug where the system wont sleep, this should only effect gingerbread but it may just be more frequent in gingerbread.
check battery usage in settings>about phone. if anything other than the display is over 50% there is a problem. if it is android system then shut it down and pull the battery for a few minutes, start it back up. if it is the cell radio then put it in airplane mode for a minute and take it out of airplane mode.
removing the cover may help it stay cool but there isnt enough heat there to cause battery drain, instead the cause of the battery drain must also be the source of the heat.
was almost thinking bout buying this phone as its very hot in africa this could burn my hands
I am on my second Infuse.
My first one had battery charging issues, and compare to the current one it was also a battery hog. I did not put two and two together until the current one i have, but the first one would get hot around the camera area with just streaming slacker while browsing the web.
I exchanged it like 4 days after i got it due to it taking 6.5 hours to charge from 5% to 100%.
I just had the same issue... it was down to 10% so I put it on the charger... 3 hours later I looked back and its barley on 40%. It took 7 hours to fully charge last night. Something isn't right. Now my screen is completely set to off and I'm underclockong and its gone from 24° to 39° in 5 minutes.
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please check the battery usage in about phone. if anything other than the screen is around 50% there is a problem, the solution may be as easy as starting airplane modeand turning it off
When I keep my phone on & just charge it up while its idle, when its at 100%, the phone is hot to the touch. Once I take it off, it cools off in 5-10 minutes. It also starts to overheat when I play games on it for at least 5 minutes. What could be the problem?
Do you have a custom rom or kernel on the phone. Mine gets mildy warm every now and again but nothing serious.
Id suggest reverting back to stock rom using your ruu and use it for a bit to see if it happens again.
i had a similar problem. my phone would overheat and not charge or charge fast enough. also after a short use the battery level would plummet. i fix the problem by changing to a new charging plug.
It shouldn't get that warm at all.
Infact, I noticed that it actually cooled down once I plugged it into the charger. I was playing a 3D game and I noticed it was getting warm, but also the battery was getting low, so I plugged it in and kept going for a bit longer, the phone actually started cooling down. I thought it was the game making the hardware heat up, but in fact, it was the battery heating up due to the power drain
Perhaps a custom rom could cause it, but I am already running mikes 6.5.2 with the 1.5Ghz firmware. But im sure others will vary.
Perhaps, if nothing else, and you're ok with taking the back off the phone, check the contacts, both on the battery and the phone, make sure they are clean. Resistance can cause heat.
I have a question. I have been doing battery research for the last few hours, and still do not TOTALLY know the answer to my question. My question is, at what temperature does damage occur to a Lithium Ion Battery. Here are a few things I have found...
1.The first stage is the breakdown of the thin passivating SEI layer on the anode, due to overheating or physical penetration. The initial overheating may be caused by excessive currents, overcharging or high external ambient temperature.The breakdown of the SEI layer starts at the relatively low temperature of 80ºC and once this layer is breached the electrolyte reacts with the carbon anode just as it did during the formation process but at a higher, uncontrolled, temperature. This is an exothermal reaction which drives the temperature up still further.
(Lithium Titanate anodes do not depend on an SEI layer and hence can be used at higher rates.)
So at around 170F the first layer of defense is broken down, which will cause the battery to begin "Thermal Running" which will cause a chain reaction until the battery explodes. As the battery is reaching that temperature, the batter slowly loses charge capacity, cycle life. So my question is....
If my battery raised to 121F will the only damage that was caused be cycle life? The tablet did not shut its self off, to prevent overheating, and did not display any overheating warnings. The only reason I know the temperature of the battery, is because I happen to have an app, that allows displays battery temperature, though I do not know how accurate this could be. When my battery is still in green, the app starts sending me warnings that my battery is low. My tablet is expensive, and I love it, so I am just wondering what, if any, damage was caused operating at that temperature. Thanks in advance for your answers, I appreciate it.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Thank you for the link, I have read it, and am still a little confused, though the information does help... If you could do any clarifying it would be appreciated.