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Old April 11th, 2010, 06:21 PM   #1 (permalink)
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Default Battery temperature

hi to all,
wanted to ask or just share what i observer, my battery is running quite warm according to battery information (type in your htc dialer screen *#*#4636#*#* battery information = 35C degrees) compared to my samsung galaxy (3.2c degress). as you see the difference is huge so dont know what should be considered normal.
so could you check your battery temperatures and let me know
thanx
btw both temperatures taken with everything off: no widgets, 3g off, background, wifi, bluetooth, sync, gps, a-gps. which shows that not the processes are keeping the battery warm.

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Old April 11th, 2010, 06:50 PM   #2 (permalink)
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3.2??! Above freezing? Lower than the ambient temperature in your room? 25c on my desire, WiFi on n playing about. I suggest your reading on other done is wrong? You think?
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Old April 11th, 2010, 08:37 PM   #3 (permalink)
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nope nothing is wrong in my readings just checking now my samsung galaxy is showing 2.7C degrees ( centegrates not farengeights) so it is above 0 trust me with 3g on.
htc desire:
Imageshack - img1678pl.jpg

samsung galaxy:
Imageshack - img1677m.jpg

so can anyone else comment on this or people with other android phones could take their readings? would be interesting to know what temperatures orthers get as i think cooler battery can last longer
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Old April 12th, 2010, 01:21 AM   #4 (permalink)
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Do you keep it in a fridge?
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Old April 12th, 2010, 03:52 AM   #5 (permalink)
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28.0C for mine, that is with everything off. But got a few widgets running.
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Old April 12th, 2010, 04:03 AM   #6 (permalink)
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Do you keep it in a fridge?
that made me rofl
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Old April 12th, 2010, 04:17 AM   #7 (permalink)
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mine is useually at around 30

3.2 is near impossible btw
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Old April 12th, 2010, 04:29 AM   #8 (permalink)
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Mines at 24.2 C, its just idling at the moment.
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Old April 12th, 2010, 04:29 AM   #9 (permalink)
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hmm i don't keep it in the fridge, lol. but i see you don't believe what you see. it either due to processor being around 500 mhz or RAM or 192MB or all some other things. or samsung managed to keep it somehow that cool.
if you don't believe in screenshots you can ask guys at samsung galaxy thread and i believe their reading will be similar (up to 10C degrees (centegrate))
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Old April 12th, 2010, 04:31 AM   #10 (permalink)
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thanx for replies
so i see that everyone's battery is almost the same. as i was a bit afraid when first saw how much warmer battery is on Desire compared to Galaxy.
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Old April 12th, 2010, 04:48 AM   #11 (permalink)
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I'd think it was faulty temperature reader, how would they make the battery be so much lower than ambient temperature?
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Old April 12th, 2010, 08:08 AM   #12 (permalink)
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as i said it might be due to processor being on much lower frequency and little of ram and smaller screen and maybe some kind of other matterials that they put in to make sure the battery stays cool (which should enable for longer battery life - which in galaxy case is completelly useless and barelly last a day with all off and various tweeks and tricks ) so so far im very happy with battery life of HTC desire and i know it will improve after a week or so usage
however this thread was open as i was concerned with high temperature as i've been used to see 1.5 - 4C degrees (centegrate) temperature on my galaxy
but i think the temperature could be brought down on desire as well if we used SetCPU on rooted desire to set cpu on lower frequencies which should keep the battery cooler as not much processing power would be involved
will root my desire one day and will come back to this thread with new readings but for now keep posting your temperatures so we can see some kind of consistency and maybe we can help each other if we see some odd readings
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Old January 20th, 2011, 07:14 PM   #13 (permalink)
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In the Galaxy they are probably measuring the temperature diference related to the "average" or "standard" value, or if that phone is fancy enough it may be showing the additional temperature with respect to the room temperature.

It can't be 2 - 5 degrees above 0, regardless the CPU speed or memory, just take the battery off the phone and see if it feels like a piece of ice, if that is the case then I will buy a few of those batteries to keep my beer cold in the cooler.
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Old January 20th, 2011, 07:31 PM   #14 (permalink)
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The coldest ive seen my Desire battery is 7c (after leaving it in the car glove box this winter) and the hottest is 41c (after internet browsing for a long time in a very weak signal area), average temps seem to be 25c to 35c during general indoor usage.

Cheers
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Old January 22nd, 2011, 08:00 PM   #15 (permalink)
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mine hits 37 oc when on the internet..
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Old January 23rd, 2011, 05:12 AM   #16 (permalink)
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I know this is an old thread, but I just had to comment.
3.2°C - really?
Maybe there's just a decimal point in the wrong place perhaps?
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Old January 27th, 2011, 03:15 AM   #17 (permalink)
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just found this thread by googlin... i got a new LG Optimus One a few days ago and it has the same problem.. and I agree with the person posting before me.. the decimal point seems to be in the wrong place.. Any ideas how to fix that? Its getting on my nerves.. lol
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Old January 27th, 2011, 12:50 PM   #18 (permalink)
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Quote:
Originally Posted by gie62001 View Post
temperature as i've been used to see 1.5 - 4C degrees (centegrate) temperature on my galaxy
but i think the temperature could be brought down on desire as well if we used SetCPU on rooted desire to set cpu on lower frequencies which should keep the battery cooler as not much processing power would be involved
For starters, SetCPU isn't really necessary as the Desire adjusts the processor speed from as low as 200MHz when idle, up to its full speed which is 998MHz. The only reason to use SetCPU would be to drop the top speed down permanently for battery saving, which I think defeats the purpose of having a fast processor and a smartphone.

As for temps, I would say the Galaxy is not reading the actual battery temp as that would be impossible, unless it's in a cold environment all the time. The only way it could be so far below typical room ambient temps is if it had active cooling, like a large heatsink and fan, which it doesn't. I think either the software is reporting with the wrong decimal place as suggested earlier, or the sensor is just completely wonky. All batteries produce heat when they are charging/discharging, it's simple physics, so it's not possible for the battery temp to be a few degrees above zero inside the Galaxy.

My Desire reports ~25C when idle and ~35C when heavily used in a room at typical temps of about 20C. When I'm outside on a cold day (-10C outside) and it's in my jacket pocket, it may read ~10C. During a warm day (30C outside) it may read ~40C at idle. I would say my Desire is reporting fairly accurately. The Galaxy clearly is not reporting correctly, for whatever reason.
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Old January 28th, 2011, 03:00 AM   #19 (permalink)
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Quote:
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...
As for temps, I would say the Galaxy is not reading the actual battery temp as that would be impossible, unless it's in a cold environment all the time. The only way it could be so far below typical room ambient temps is if it had active cooling, like a large heatsink and fan, which it doesn't. I think either the software is reporting with the wrong decimal place as suggested earlier, or the sensor is just completely wonky. All batteries produce heat when they are charging/discharging, it's simple physics, so it's not possible for the battery temp to be a few degrees above zero inside the Galaxy.
...
Even a H/S + Fan won't get anything below ambient. Ye cannae break the laws of physics Jim.
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Old January 28th, 2011, 06:10 PM   #20 (permalink)
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Even a H/S + Fan won't get anything below ambient. Ye cannae break the laws of physics Jim.
Oh wow I wasn't thinking straight with that one...maybe I was sleepy.

I know a heatsink can't go below ambient air temps. That wasn't my point...my point was that the temps reported were impossible.
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Old January 29th, 2011, 08:41 AM   #21 (permalink)
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Oh wow I wasn't thinking straight with that one...maybe I was sleepy.

I know a heatsink can't go below ambient air temps. That wasn't my point...my point was that the temps reported were impossible.
I know, sorry. Was having a hard day at work (doing some thermal testing, as it happens!), and needed a little a little facetiousness to lighten the mood.
It's quite obvious that the Galaxy is reporting incorrectly, why some people believe it amazes me.
And why I'm commenting on a thread that's nearly a year old is also quite puzzling. I'll get me coat.
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Old January 29th, 2011, 05:26 PM   #22 (permalink)
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Quote:
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I know, sorry. Was having a hard day at work (doing some thermal testing, as it happens!), and needed a little a little facetiousness to lighten the mood.
It's quite obvious that the Galaxy is reporting incorrectly, why some people believe it amazes me.
And why I'm commenting on a thread that's nearly a year old is also quite puzzling. I'll get me coat.
Ha, I didn't even realize it was that old...the thread was revived I guess. I also didn't use Android until July 2010 and joined these forums some time later, so I missed a lot of older threads. I have to say though, I've never been a fan of Samsung phones - too many problems and failures. I like their TVs though. Go figure.
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Old January 31st, 2011, 12:09 PM   #23 (permalink)
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Quote:
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Ha, I didn't even realize it was that old...the thread was revived I guess. I also didn't use Android until July 2010 and joined these forums some time later, so I missed a lot of older threads. I have to say though, I've never been a fan of Samsung phones - too many problems and failures. I like their TVs though. Go figure.
I agree, I hate their phones....but without fail, they always have the best picture on the tv's when I go to an electronic store.
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