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HTC Evo 3D Voltage/Heat IssuesSupport


Does your 3vo get hot under the following charging conditions? (click choices in wall _and_ USB)

  1. YES - when using the wall charger, my phone gets hot

    33 vote(s)
    24.8%
  2. NO - when using the wall charger, my phone stays cool

    59 vote(s)
    44.4%
  3. MAYBE - when using the wall charger, mine is sometime hot, sometime not

    35 vote(s)
    26.3%
  4. YES - when using USB/computer, my phone gets hot

    15 vote(s)
    11.3%
  5. NO - when using USB/computer, my phone stays cool

    55 vote(s)
    41.4%
  6. MAYBE - when using USB/computer, mine is sometime hot, sometime not

    20 vote(s)
    15.0%
  1. JD_from_da_80s

    JD_from_da_80s Well-Known Member

    Have y'all tried charging the phone screen down? I've noticed that when I charge it that way my voltage was down for some reason. Also the battery stays cool. It's like the camera is a vent & my desk was keeping the heat in.
    EarlyMon likes this.
  2. momoceio

    momoceio Well-Known Member

    Also, has anyone ran any of these apps on their Evo 4g or other Android phone? Scientific method peeps..
  3. Crazeychinee

    Crazeychinee New Member

    4350mV 38.2T/77Room T 99% Charge
    15mins : 4348mV 37C 77F Room T 99% Charge
    15mins : 4346mV 35.2C 77F Room T 99% Charge
    15mins: 4346mV 34.4C 77F Room T 99% Charge
    Noticed area around camera lense slightly warm, powered off (I'm so new to all of this I wasn't sure which apps to shut down and felt it safe to just power off. Phone felt cool after 5mins.
    After 45mins green light and turned phone on: 4234mV 29.7T/77Room T 99% Charge
    5mins: 4282mV 29.3C 77F Room T 98% Charge with green light.
    Used System Panel App Lite
    Wall Charge/htc
  4. hitman618

    hitman618 Member

    why does everyone try to find things to complain about? like i care your going to pull out your old outdated phone and use it? why is this even stickied? my phone is not overheating or having any problems and i got it on the release date, i would think if your phone is getting hot you would use common sense and take it back to sprint and they will replace it. people should realize that your basically carrying a mini computer in your pocket around on a daily basis and things will not always be perfect, and in the millions of devices that are made there will most definitely be some phones that have problems
  5. EarlyMon

    EarlyMon The PearlyMon Moderator

    The irony.


    It's stickied because statements made by a company representative in the OP are alarming and the issue demands attention, so that those with defective phones know what's up and to return them.

    Glad yours is working out for you, mine is as well (after replacement for a bad RF unit).

    Otherwise - please remember to attack issues and not people, cheers, thanks.
    JCampbell, jconnon, 3volut1on and 3 others like this.
  6. LBPHeretic

    LBPHeretic Well-Known Member

    In my opinion, it is always better to be in the know. Being armed with knowledge is always a good thing.

    Yes, often problems can seem blown out of proportion because the people who are having them weigh in more heavily than those who do not. However, I am seeing very balanced opinions on the issue here in this thread and I think that it is serving as a good place for collecting data on the subject and analyzing it with the collective mind of concerned users.
  7. AndroidSPCS

    AndroidSPCS Well-Known Member

    This is a HTC Evo 3D and more over an Android COMMUNITY.

    Many people come here to find solutions to their issues, and an alarming issue like this needs to be visible because we need to get to the root of it.

    If you don't care about it, why even post in this thread?
  8. EarlyMon

    EarlyMon The PearlyMon Moderator

    Let's please move back to topic.
    novox77 and marctronixx like this.
  9. sceadwe

    sceadwe New Member

    so today i was getting atrocious battery life. i unplugged it from a full charge at 6:45am and by 8:30 it was at 50%. at this point i decided to charge the phone and do the calibration as follows:

    charge while on til green, disconnect from charger
    turn off phone, charge til green
    turn on phone then turn off again fully
    charge til green and then finally disconnect and power on.

    after doing this though i noticed no change whatsoever. immediately upon disconnecting from the charger it dropped 3% then over the next 40 minutes it dropped another 21%.
    thats when i decided to start playing with the settings.

    where i work they have a network extender for verizon, sprint does not have any reception at my desk and hence i am forced to roam on this extender. because of this i believe that my phone's radio is working extra hard to maintain a connection with our failing extender (verified using my droid x) and try and search for sprint towers simultaneously. so one of the first things i disabled was data. after a half hour of disabling the data my battery had cooled almost 10 degrees celsius and the battery charge declination slowed down significantly. it is now 5 hours later and it only dropped another 25%.

    granted disabling data is not an option in most scenarios but in my case it worked perfectly as the connection to the extender is too slow for data usage.

    from my experience today i am lead to believe that the heat issue may be related to the radio and your reception. i am not sure how roaming may affect this but it seemed to only be a problem with data. i could still roam without 3G and was able to send and receive SMS messages fine.

    any thoughts? am i crazy or is this a reasonable deduction?
  10. spy2jgc

    spy2jgc Member

    Personally I think all the information contributed to the members on this forum has been a great help in exploring the issue, and I appreciate the ideas, possible solutions, and troubleshooting tips. And thanks to you all for trying to solve it for our common good, and confirming there is not just one or two people out here with the problem.

    I don't see "whiners" in here, but people trying to address a legitimate concern. It's very easy to send a phone back to Sprint and get a new one (as I did) but it doesn't address the original problem when there is one... and the new Evo 3D replacement I received happened to have all the same problems of my first one. I considered sending the second phone back, and just giving up on the Evo 3D, quietly walking away from it. But that only serves me, doesn't help me, and leaves others with the same issue unaware until it's possibly too late. So sending the phone back, in my case, didn't solve the issue. My hope was (and still is) one of my fellow 3D owners will have an answer, and Sprint/HTC will address the problem (if found to be a legitimate issue) and publicly acknowledge it.. which in great part will be from the users of this forum.

    Back to a little technical info/testing:

    Recently, when the battery dies I've been pulling it from the phone and charging it on a digital LiIon charger to see what results I get. I can confirm, when the battery is directly charged (not through the phone) with a digital LiIon/LiPo charger at 4200mv and .5C (850 ma per hour), it stays cool (ambient room temperature 21 degrees C) and takes a full capacity charge, with an ending voltage of 4200mv. For me, with the information I have so far, it confirms this battery shouldn't be charged with voltage higher than 4200mv (the charger won't allow it, and if I "trick" it into attempting to do so, alarm beeps sound and it discontinues charging). Please don't try it (you must use a special charger and have familiarity working directly with LiIon batteries)
  11. spy2jgc

    spy2jgc Member

    I did with the Evo 4G when I first got it (not battery monitor app... not sure it was out at the time), but not nearly to the degree I did on the 3D because I never had the need to... it always showed 4200mv peak, so the voltage issue wasn't there and no heat symptoms, so I had no concerns. The 4G would hit 4200mv a little bit before full charge... say 90 to 95%... and stay there after reaching capacity until unplugged.
  12. EarlyMon

    EarlyMon The PearlyMon Moderator

    Why are we seeing high voltage without high temperature?

    Do you have any opinions on the accuracy of those sensors?
  13. momoceio

    momoceio Well-Known Member

    I checked my wife's Evo 4g last night while charging, I only got to play with it for about 10 minutes but it got up to 39.4 C and voltage was at ~3.85v. The battery level was 16% when I was playing with it so I didn't get to see what happened as it neared a full charge.
  14. nothing

    nothing Member

    I went to sleep early last night leaving WIFI on, mobile data off like the previous two weeks. Woke up in the middle of the night and noticed the phone next to me (using it as an alarm every morning) is close to frying when I try to check the time. There was only 14% battery left at 2am. I went to sleep around 11 with 90% of battery, when I wake up in the morning, I typically have close to 80% left. Note that I don't charge my phone at night and only charge it at work. I use Juice Plotter for the past two weeks and have been monitoring the usage closely. Typical temperature is around 25C idle/charging, 32C while on use and 35C when on WIFI. During 11pm to 2am last night, the temperature was at 45C. I checked the apps that was running at the time and couldn't figure out what could have caused it. Have anyone have an issue like this where the battery just went berserk and try to blow up?
  15. jerofld

    jerofld Fixing stuff is not easy VIP Member

    Open the battery compartment and push gently on the battery. Does it feel solid, or squishy?

    If firm, then it's something on the phone that is drawing a lot of current, which is causing a lot of heat. I don't know what, given what you said was on, off and normal. But it's not the battery.

    If it's squishy/puffy, replace it ASAP.
    EarlyMon likes this.
  16. chikku_ns

    chikku_ns New Member

    I also face Exactly same issue as you have mentioned
  17. falconey

    falconey Well-Known Member

    You seem very knowledgeable on the subject so maybe you can help me understand why the cut off point for the 3VO would be 4200mv. Would the engineers not build in tolerance above the 4200mv stated capacity?
  18. EarlyMon

    EarlyMon The PearlyMon Moderator

    Ok - help me understand - the penny finally dropped that you mentioned plating.

    You're saying that the higher voltage creates a state where either electroplating or reverse electroplating occurs.

    I'm not clear that (reverse)electroplating has a thermal by-product. (I reverse electroplate things, but never bothered to check temp.)

    Hmmm.

    If I understood correctly, the capacity is nominally 3700 mV and 4200 mV is the upper tolerance.
  19. spy2jgc

    spy2jgc Member

    I didn't see the plating comment, so maybe I am missing something?

    You understand the voltage rating correctly, at least from my perspective and experience. 4200mv would be the upper tolerance, and devices and/or chargers should have that regulation and limit built into them already, just as I am sure the 3D does. With the high voltage, there shouldn't be much heating once full charge is reached and there is little activity on the phone, because the battery has reached capacity and their is no real current flowing through it.

    The voltage (and heating that seems associated with it) seems to effect the minority of phones (based on the polling here) so the regulated charging must be working properly on most devices, even though the voltage reads as high. As to the voltage readings being reported incorrectly by the phone, I think that it's something possible but with what I have available to work with (1 Evo 3D and it's battery) and voltage reading and charging tools, on my phone it appears to read correctly.

    LiIon technology is so complicated I hate trying to dive too deep into it because it then goes beyond my experience and comfort to speak about, and I don't want to be making guesses. A LOT of engineering goes into LiIon batteries and the devices that run them, because of the great power of LiIon and the "control" necessary to charge them.

    When Alkaline, NiMh and other older technologies stray outside of their voltage range, they stay pretty stable. LiIon and Lithium Polymer much less so. NOT that they are randomly dangerous or volatile, they just require more care. Normally we never think about it, because the phone takes care of everything for you and we don't give the battery a second thought. You can't simply plug a LiIon battery into a wall without a regulated charger, which in our case is mostly the phone. In RC applications I've seen what happens when batteries are used outside of the set range. Phone batteries AREN'T RC batteries but they use the same technology and require the same care... so when I see the voltage on my phones battery outside of that "set" range, it naturally makes me question why.

    I am far from an expert on LiIon batteries or phone charging technology... I am not a chemist or engineer. I'm hoping to hear or get input from somebody who is. I just want my phone to work normally.
  20. EarlyMon

    EarlyMon The PearlyMon Moderator

    spy2jgc, falconey and novox77 like this.
  21. jerofld

    jerofld Fixing stuff is not easy VIP Member

    I have also confirmed that the voltage readings are correct in a previous post.
    EarlyMon likes this.
  22. EarlyMon

    EarlyMon The PearlyMon Moderator

    Active thread, I'm easily confused - will re-read.
  23. novox77

    novox77 Leeeroy Jennnkinnns! VIP Member

    ghacker and EarlyMon like this.
  24. EarlyMon

    EarlyMon The PearlyMon Moderator

    Good find!

    Makes me wonder about the validity of just slapping any battery you like in this new pup and expecting goodness.
  25. spy2jgc

    spy2jgc Member

    That is a great find.... if it's a new technology, it's BRAND new and changes everything I've know about liIon. POSSIBLY the phone is putting out more voltage so the voltage the phone gets is a little higher and the voltage the battery is supposed to get is 4.2V... like the chargers put out 5+Volts, but they don't go directly to the battery.... phone reduces it before reaching the battery. The PHONE may be able to run on a higher voltage than 4.2, so it allows itself to take the higher voltage from the charger and uses it directly, so it's not feeding off the battery at a lower voltage. The higher "horsepower" the voltage gives to the phone may help it's processor run more efficiently or something..... like many computers that run at a faster processor speed when plugged into the wall, then step down when running on battery power.

    You have me really curious now. For example on many laptop computers, when the charger is plugged in, the processor runs at it's "full capacity" and seems to get a higher voltage... but when switched to battery the processor drops to a reduced speed to handle the reduced voltage and/or current coming in from the battery and to not drain the battery so fast. I would think the phone and/or battery would have a "pass-through" on it... so when you are using it when it's plugged in, it's using power directly from the wall.... not pulling it from the battery and then constantly recharging it. But I don't know. I'm going to dive into your specs to see if anything sticks out. One thing I still don't understand is why the battery would receive a higher voltage when it WANTS to run at 4.2 or less... coming off a charge it's normally over 4200mv, but it drops FAST down to 4200mv.
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