[Q] Warm when charging? - Eee Pad Transformer Q&A, Help & Troubleshooting

Hi,
My TF101 seems to get warm when charging. I didn't notice this with the other ones I used, but perhaps I just missed it. Can anyone else confirm or deny this happens with theirs please?
Thanks.

Yup it happens, nothing to worry about, it also gets a little warm when running a CPU intensive app.

Yeah, mine heats up a little bit when it's charging as well. I can still hold it though, so I'm not afraid of it being too hot.
I decided to do a quick test to see what the temperatures really were... The unplugged temp was after I had left the screen on for 30 seconds and haven't run any games/applications recently.
Plugged in temperature was measured after being plugged in for 5 minutes and screen on for 30 seconds.
Battery temp unplugged: 24~25C
Battery temp plugged in: 26~26.5C
So not too much difference but I'm sure if you were using it while it was charging, it would heat up a lot more.

It's a common effect for many portable device. My EVO 4G gets fairly warm, my old iPhone 2G got super warm, my laptop gets piping hot, my Sprint Overdrive gets a bit warm. The only portable device that doesn't get warm while charging is my BB 9700.

Yep, mine gets warm to when its being used, in the right-hand quarter in back. But when I say "gets warm," I mean literally just a tad warmer than the rest of the unit. It never approaches "really warm," and certainly not "hot." I can't say if the Xoom ever gets warmer when in use because I've always used it in its case.

it should fine..
the charger itself is not warm..it's actually very very hot...

seshmaru said:
Yup it happens, nothing to worry about, it also gets a little warm when running a CPU intensive app.
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Click to collapse
I heard about ASUS update FW this week.
However, you maybe go to RC (repair center) for updating the newest FW.

magicpork said:
it should fine..
the charger itself is not warm..it's actually very very hot...
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Click to collapse
Never really felt it before you mentioned this but... you are right, it is really hot.
Also, when I touch the dock lightly while charging, I can feel it vibrating.

Related

How hott does your sensation get when just browsing?

Mine is always at about 101 degrees just surfing etc? is this normal? or is it too hott? games get to about 110 or whatever. Charging about 104 degrees.
Also, I noticed a bubble under the battery on the phone. Its just like the sticker didnt stick and made a bubble. I basically flattened it down, but it dont look perfect, but should I be worried about that?
Reason Im asking is phone feels warm and battery is draining. Damn we really need to get rid of this BLOOOAT.
I found a primary culprit to be screen brightness. I'm not saying WiFi and processor intensive apps won't do it, or GPS, but I have had to settle for about 40% screen brightness or I get heat and a battery that drains really fast.
Barely gets warm, might be my own heat from my hands. Using wifi with screen brightness low. Does get a little warmer charging, nowhere near hot
My Phone too gets warm during use espcially using GPS while driving and charging. 45degC ~ 113degF was the max so far.
Screen brightness seems to have an effect on warmth of case, for sure, as well as battery life, obviously.
I think mine gets the hottest when I am surfing on an adapter, using WiFi, and GPS. That's only logical.
I'm thinking T-Mobile pushed something to my phone over the last couple of weeks though since it does not get as hot or blow through the battery as fast, and they also solved a corrupted video issue as well.

Shield battery charging issue?

Anyone having charging issue. I ran my shield battery down when I first got it. Then I plug it in to charger. Its been charging over 8 hours and still not at 100 percent. took it off charge at 80 percent. No way it should take this long. I read on reviews it took like 4 to 5 hours.
evobunny said:
Anyone having charging issue. I ran my shield battery down when I first got it. Then I plug it in to charger. Its been charging over 8 hours and still not at 100 percent. took it off charge at 80 percent. No way it should take this long. I read on reviews it took like 4 to 5 hours.
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Click to collapse
You used the charger that it came with? And you're not playing games the entire time it's charging, right?
agrabren said:
You used the charger that it came with? And you're not playing games the entire time it's charging, right?
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Click to collapse
yes I use charger that came with it. and it was charging over night when I was sleeping.
That sounds really odd. What does the battery usage say for the device? Was it awake the whole time? Does it think it was charging all night?
Sent from my HTC One using XDA Premium HD app
I feel like that has happened on my nexus 7 before. I bet it is an android thing. I would try again and see if it acts up a second time.
agrabren said:
That sounds really odd. What does the battery usage say for the device? Was it awake the whole time? Does it think it was charging all night?
Sent from my HTC One using XDA Premium HD app
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Click to collapse
when I was charging, i close the screen. so it went to sleep. I dont know how you can tell if it think it was charging all night. I went to battery info and its said 13.6 hours on battery. and 48 percent of that was screen usage. rest was on game and apps.
evobunny said:
when I was charging, i close the screen. so it went to sleep. I dont know how you can tell if it think it was charging all night. I went to battery info and its said 13.6 hours on battery. and 48 percent of that was screen usage. rest was on game and apps.
Click to expand...
Click to collapse
If you go into the "Battery Info" and touch on the graph area, it'll show you below some bars of time spent on different functions (like charging)
evobunny said:
when I was charging, i close the screen. so it went to sleep. I dont know how you can tell if it think it was charging all night. I went to battery info and its said 13.6 hours on battery. and 48 percent of that was screen usage. rest was on game and apps.
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Click to collapse
1. Sometimes the battery indicator on Android can take a while to figure out your battery. It might drop 5 percent in ten minutes then take an hour to drop 5 more.
2. The vent area on my Shield seems warmer than the surrounding plastic even when in sleep for a while, so it may be drawing more power than is charging. Just try turning it off and charging it.
oushidian said:
1. Sometimes the battery indicator on Android can take a while to figure out your battery. It might drop 5 percent in ten minutes then take an hour to drop 5 more.
2. The vent area on my Shield seems warmer than the surrounding plastic even when in sleep for a while, so it may be drawing more power than is charging. Just try turning it off and charging it.
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Click to collapse
Which vent area? Front or back? Because batteries do warm up when you charge them, and those are some big batteries (and a full 2 amp charge)
agrabren said:
Which vent area? Front or back?
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Click to collapse
The smooth part on the bottom back with the model number, FCC, etc. And it's not when I'm charging but when the lid is closed. If I manually power it down then the warm goes away.
i never recommend running your device down when it comes straight out the box. usually i tell people to just fully charge the device first before running it dry therefore it can register the full battery, personally i would not leave a device connected over night just for the simple fact that it can be one in a million that the device might get screwed over a long period of time.
it be nice to know if the problem is fixed or not and what you did just in case others run into this same problem.
ive had no charging issues yet. batts do tend to get nice and warm tho.
but for what its worth i just noticed that im still getting notification sounds from my Shield even tho the lid is closed. so maybe its some kind of hybrid sleep and if you have some rogue app pulling a ton of CPU cycles & its not going into full sleep so its taking longer to charge?
just some food for thought on your issue
s0me guy said:
ive had no charging issues yet. batts do tend to get nice and warm tho.
but for what its worth i just noticed that im still getting notification sounds from my Shield even tho the lid is closed. so maybe its some kind of hybrid sleep and if you have some rogue app pulling a ton of CPU cycles & its not going into full sleep so its taking longer to charge?
just some food for thought on your issue
Click to expand...
Click to collapse
Like most Android devices, the device goes to "sleep". Unless you power it off, it still handles notifications, and it still talks on WiFi. But it should consume very little power.
elitecmdr666 said:
i never recommend running your device down when it comes straight out the box. usually i tell people to just fully charge the device first before running it dry therefore it can register the full battery, personally i would not leave a device connected over night just for the simple fact that it can be one in a million that the device might get screwed over a long period of time.
it be nice to know if the problem is fixed or not and what you did just in case others run into this same problem.
Click to expand...
Click to collapse
Modern devices use LiPi or Li-ion batteries, these explode when overcharged (seriously, youtube search overcharge lipo). As a result all devices sold with this kind of battery have charge monitoring tools and will disconnect the battery from the charging circuit when full, also they should then run purely from the mains power when the battery is full rather than running on the battery again (they don't like the repeat connect/disconnect effect that would lead to). End result, can't overcharge it.
The heat on mains power tends to be from the voltage regulator. These devices don't run on 5V power like comes from the charger. They tend to use a combo of switch mode and linear regulators to drop the 5V to 3.3V for the CPU and peripherals (3.3 is most common at any rate). Linear regulators in particular get quite warm. Switch mode regulators don't get so warm but don't give a clean output the CPU will run nicely on, they have the odd drop or spike which would either reset or fry the CPU, so generally what happens is the switch mode reg drops a large chunk of the voltage and then feeds it into a linear reg to drop the rest of the way (*the less voltage a linear reg has to drop the less heat it produces). From 5V to 3.3V it is most likely going to be purely a linear regulator, with the CPU and screen drawing at least 1A of current and a 1.7V drop that would equate to 1.7W of heat produced, not much, but enough that if you were to put your finger on the bare regulator chip it would come away red, hold it there long enough and it would be somewhat like those competitions kids have over who can keep their hand on the hot radiator longest That is the main reason they will get hot.
The batteries in these devices are usually 3.7V, that would need a separate regulator from above, and another regulator would still be needed to go from 3.7 > 3.3. 3.7>3.3 would not get so warm. 5>3.7 would still be warm as above.
Never fully drain a LiPo. Gets too low and you damage the cell ir-repairably. When the device claims it is at 0% charge and shuts off is usually closer to 10-20% charge. But that is still considered too low by some people. General advice if you want to prolong the lifetime of your battery is to turn the device off and charge it when it reports somewhere around 5-10% charge.
Batteries do get warm while charging. But my bet is that the voltage regulators would be far more significant heat producers.
agrabren said:
Like most Android devices, the device goes to "sleep". Unless you power it off, it still handles notifications, and it still talks on WiFi. But it should consume very little power.
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good to know. :good: i didnt think closing the lid was the same as pushing the power button on my phone to turn the screen off.
but the OP's problems still might be "sleep" related.
prime example my SGS3 batt life started to tank after the 1st VZW JB update. it took twice as long to charge & would never "sleep" (cuz of the OS not a app) but since the Tegra 4 is a much higher profile chip it could suck a bit more juice if its not being aloud to fully sleep, for whatever reason.
like you said tho, looking at the battery stats could easily tell us if this is the issue.
SixSixSevenSeven said:
Modern devices use LiPi or Li-ion batteries, these explode when overcharged (seriously, youtube search overcharge lipo). As a result all devices sold with this kind of battery have charge monitoring tools and will disconnect the battery from the charging circuit when full, also they should then run purely from the mains power when the battery is full rather than running on the battery again (they don't like the repeat connect/disconnect effect that would lead to). End result, can't overcharge it.
The heat on mains power tends to be from the voltage regulator. These devices don't run on 5V power like comes from the charger. They tend to use a combo of switch mode and linear regulators to drop the 5V to 3.3V for the CPU and peripherals (3.3 is most common at any rate). Linear regulators in particular get quite warm. Switch mode regulators don't get so warm but don't give a clean output the CPU will run nicely on, they have the odd drop or spike which would either reset or fry the CPU, so generally what happens is the switch mode reg drops a large chunk of the voltage and then feeds it into a linear reg to drop the rest of the way (*the less voltage a linear reg has to drop the less heat it produces). From 5V to 3.3V it is most likely going to be purely a linear regulator, with the CPU and screen drawing at least 1A of current and a 1.7V drop that would equate to 1.7W of heat produced, not much, but enough that if you were to put your finger on the bare regulator chip it would come away red, hold it there long enough and it would be somewhat like those competitions kids have over who can keep their hand on the hot radiator longest That is the main reason they will get hot.
The batteries in these devices are usually 3.7V, that would need a separate regulator from above, and another regulator would still be needed to go from 3.7 > 3.3. 3.7>3.3 would not get so warm. 5>3.7 would still be warm as above.
Never fully drain a LiPo. Gets too low and you damage the cell ir-repairably. When the device claims it is at 0% charge and shuts off is usually closer to 10-20% charge. But that is still considered too low by some people. General advice if you want to prolong the lifetime of your battery is to turn the device off and charge it when it reports somewhere around 5-10% charge.
Batteries do get warm while charging. But my bet is that the voltage regulators would be far more significant heat producers.
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yes while all this your saying is true i still wont risk it. i say this from experience had a note 10.1 and would leave it over night charging and sure enough it ended up screwing up. might of been there was something wrong with the device itself but still. good post on your behalf though :laugh:
but still im paranoid and prefer to just disconnect once its charge it wont hurt
elitecmdr666 said:
yes while all this your saying is true i still wont risk it. i say this from experience had a note 10.1 and would leave it over night charging and sure enough it ended up screwing up. might of been there was something wrong with the device itself but still. good post on your behalf though :laugh:
but still im paranoid and prefer to just disconnect once its charge it wont hurt
Click to expand...
Click to collapse
I tend to go into way too much detail sometimes :/
Disconnecting can't harm it at least if that's what you prefer.
As for info source. Quite into electronics and robotics, intact the shield would make a good controller for robotics purposes
well i did my second charge last night. and this time much faster, about 5 hours to 100 percent. guess i dont have a problem after all. dont know what happen the first time.
SixSixSevenSeven said:
I tend to go into way too much detail sometimes :/
Disconnecting can't harm it at least if that's what you prefer.
As for info source. Quite into electronics and robotics, intact the shield would make a good controller for robotics purposes
Click to expand...
Click to collapse
no worries lol i tend to get spaced out at times and go into details does not hurt to enlighten people :good:

Nexus 5 gets extremely hot after charging overnight

Last night I charged my new nexus 5 with the charger my wife always uses with her galaxy s3. I noticed the charging icon turned on (lightning symbol) before putting the phone under the pillow.
I woke up this morning realizing the phone is extremely hot and it seemed like it hadn't been charged at all.
I charged the nexus 5 again with its original charger and everything wad just fine.
Anyone has this problem before? Will the extreme heat damage the phone or the battery at all?
Thank you
Please don't put your phone under your pillow.
osnapitsjoey said:
Please don't put your phone under your pillow.
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Click to collapse
Absolutly... and do not use other wall chargers I would say. Especially if you haven't tested it with your phone yet.
But... that still sounds strange imo, it obviously should be hot while charging under a pillow, but why would it be discharged and still hot way after the normal end of the charging ? I'm thinking of a black screen of death i'm afraid..
Happened in the past with my optimus 2x until i got a kernel which fixes it.
And so, exactly the same situation was happening sometime before the fix ; put on charge during the night and in the morning, got a very hot powered off phone with an empty battery despite beeing still pluged...
Just my 2 cents
Mynix said:
Absolutly... and do not use other wall chargers I would say. Especially if you haven't tested it with your phone yet.
But... that still sounds strange imo, it obviously should be hot while charging under a pillow, but why would it be discharged and still hot way after the normal end of the charging ? I'm thinking of a black screen of death i'm afraid..
Happened in the past with my optimus 2x until i got a kernel which fixes it.
And so, exactly the same situation was happening sometime before the fix ; put on charge during the night and in the morning, got a very hot powered off phone with an empty battery despite beeing still pluged...
Just my 2 cents
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Click to collapse
It was probably searching for a signal all night... and heat kills batteries.
Hahaha mine doesn't do that
Sent from my LG-D802 using Tapatalk
My galaxy s2 used to get extremely hot when charging under a pillow. Don't do it.
lafester said:
and heat kills batteries.
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Click to collapse
heat will definitely destroy the overall capacity of the battery
just put in water itll cool it off....

My wireless TYLT charger almost melted my N5...

I set my N5 on my charger (it was at 90%) after lunch and then walked away from my desk. I got back to my desk and saw the LED blinking from a text message so I turned the screen on and realized it was SUPER hot and the charge was only at 81% even though it had the lightning bolt over the battery icon as if it is charging.
Has anyone else had this happen and should I be worried it damaged my phone?? The phone was almost too hot to handle, so I turned it off immediately in hopes it would cool down faster/reduce the harm to hardware.
I've been using the charger without any issues for over a month now, but this might be the last time I trust it.
bekyndnunwind said:
I set my N5 on my charger (it was at 90%) after lunch and then walked away from my desk. I got back to my desk and saw the LED blinking from a text message so I turned the screen on and realized it was SUPER hot and the charge was only at 81% even though it had the lightning bolt over the battery icon as if it is charging.
Has anyone else had this happen and should I be worried it damaged my phone?? The phone was almost too hot to handle, so I turned it off immediately in hopes it would cool down faster/reduce the harm to hardware.
I've been using the charger without any issues for over a month now, but this might be the last time I trust it.
Click to expand...
Click to collapse
This is a known issue with the TYLT and the N5: http://forum.xda-developers.com/showthread.php?t=2571188
You can try turning off Day Dream. This will help some.
my cheap ass 21$ Qi charger never does this check it out
http://forum.xda-developers.com/showthread.php?t=2585159
youtube video attached
I'm really curious as to what's causing this because I've been using the TYLT daily for a few weeks and my phone doesn't even get warm. Kinda nervous to continue using it though.
Wireless charging already can heat up the phone by a few more degrees then using a wire.
People are then doing things such as Daydream or simply running apps which are causing the phone to have a high current draw which could potentially cause issues such as:
-using more power then is being provided
-getting very hot from being both used and charged at the same time.
Welp. Unfortunately, it looks like I can be added to the list of those who have been "burned" by the Tylt Vu. I've been using two different ones for about two weeks now with no issues at all. The hottest my N5 would ever get would be around 37C (but it would usually hover around 34-35C). I've been keeping an eye on the battery temp since reading all these horror stories of overheating. Tonight, it was charging fine when I picked my phone up to check a text and mess around for a couple minutes. When I put it back on, it was probably around 37-38C or so. I was sitting next to it and touched the screen to check the temp, and it felt REALLY hot (only about 5-10 minutes after setting the phone back down to charge). So I took it off and the battery temp was showing 49.5C with "health" saying "overheating". I always make sure the screen is turned off after putting it on the charger, so I know it wasn't in daydream or anything. Kinda freaked me out. I love these chargers, but my faith in leaving them unattended while charging is now shaky at best.
charesa39 said:
Welp. Unfortunately, it looks like I can be added to the list of those who have been "burned" by the Tylt Vu. I've been using two different ones for about two weeks now with no issues at all. The hottest my N5 would ever get would be around 37C (but it would usually hover around 34-35C). I've been keeping an eye on the battery temp since reading all these horror stories of overheating. Tonight, it was charging fine when I picked my phone up to check a text and mess around for a couple minutes. When I put it back on, it was probably around 37-38C or so. I was sitting next to it and touched the screen to check the temp, and it felt REALLY hot (only about 5-10 minutes after setting the phone back down to charge). So I took it off and the battery temp was showing 49.5C with "health" saying "overheating". I always make sure the screen is turned off after putting it on the charger, so I know it wasn't in daydream or anything. Kinda freaked me out. I love these chargers, but my faith in leaving them unattended while charging is now shaky at best.
Click to expand...
Click to collapse
When it happened to me I never turned the screen on during charging either.
And for the record I have never used the Daydream feature :-/
I was excited at first of the premise of wireless charging particularly to cut down on wear and tear to the micro USB port, but now I'm back to the old fashioned way.

My S7 startet a small fire at the charging port. Did anyone else experience that?

It was not the battery but at least the charging port burned during fast charge.
I was using the officially supplied Fast Charger which came with the phone.
Seems the phone got so hot that it switched off. The phone was lying on the carpet while it happend. Luckily it didn't lit the carpet next tpo my bed while I was sleeping...
I've put detailed info into this video:
https://www.youtube.com/watch?v=GxeYSV8toXA
Samsung picked up the phone today, waiting for their reply.
As far as I know there was no damage on the phone prior to the event. Even the Liquid Damage Indicator is ok.
The Phone was 6 month old.
Should I better use wireless charging overnight in the future? Any experience?
AirHH said:
It was not the battery but at least the charging port burned during fast charge.
I was using the officially supplied Fast Charger which came with the phone.
Seems the phone got so hot that it switched off. The phone was lying on the carpet while it happend. Luckily it didn't lit the carpet next tpo my bed while I was sleeping...
I've put detailed info into this video:
https://www.youtube.com/watch?v=GxeYSV8toXA
Samsung picked up the phone today, waiting for their reply.
As far as I know there was no damage on the phone prior to the event. Even the Liquid Damage Indicator is ok.
The Phone was 6 month old.
Should I better use wireless charging overnight in the future? Any experience?
Click to expand...
Click to collapse
Scary
I would not charge that phone in any possible way...just in case
Let us know what they tell you when you get the phone back
yea i would use a wireless charger because i think the rubber protection near the charging port gets weaker after months of use with the normal charger. You can buy a fake wireless charger for 12 bucks on aliexpress.
Wow, things are not good with Samsung and their exploding / catching fire phones, this is slightly worrying that it's happened with an S7
Lucky that it did not go any further than the charging port, especially if it was on the carpet
Perhaps it overheated because the back of the phone was on the carpet and not a solid surface where heat could escape, but they should not catch fire, just overheat and shut off charging and power
Keep us updated with what Samsung tell you, I don't fancy this happening to mine
*Detection* said:
Perhaps it overheated because the back of the phone was on the carpet and not a solid surface where heat could escape, but they should not catch fire, just overheat and shut off charging and power
Click to expand...
Click to collapse
It lay down with the display-side to the carpet. It was the same way as every night. Floor-Heating is still off at this time of the year. Room temperature in our sleeping room is around 18°-19°C (~ 65°F)
So this should not create a heatspot. And I never noticed that the phone was so hot that I was afraid it might catch fire.
AirHH said:
It lay down with the display-side to the carpet. It was the same way as every night. Floor-Heating is still off at this time of the year. Room temperature in our sleeping room is around 18°-19°C (~ 65°F)
So this should not create a heatspot. And I never noticed that the phone was so hot that I was afraid it might catch fire.
Click to expand...
Click to collapse
No, that definitely should not have caused it to overheat
I hope Samsung are honest with you about the reason for the fault
And tbh, it doesn't seem like an overheating problem, it sounds more like whatever the fault was, caused the battery to overcharge and overheat
I think you are very lucky this didn't cause another battery fire
Are you using the "fast-charging" option? I would recommend disabling that,
This was my main concern since I bought my s7 in july. I noticed that when it's charging with regular 2A/5V option, the plastic on the port which goes into phone gets warm. On fast charging it doesn't get warm, because the voltage is higher, but amperage is 1.60A.
Does anyone else have this "problem", or should I replace my cable? I don't want to end up with a fried port too.
since the spot of where it burned is at the contacts it was probably just a short because moisture between the contacts or maybe conductive debris got in there.
also its normal for the battery to warm up during peak charge.

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