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. spy2jgc

    spy2jgc Member

    (Mod notes in posts 16 and 17.)

    I just thought I'd post this as an "FYI", not really looking for feedback or anything.

    I received my first Evo 3D through the mail from Sprint on June 23rd, and immediately noticed how warm it got while charging. I AM aware phones get warm when Wi-Fi, GPS, etc. are on, but it was getting VERY warm. Eventually I looked into the voltage the phone was charging at, and it was at 4.385 Volts!

    The MAX voltage a LiIon (1 cell) battery can charge at is 4.1/4.2 Volts (depending on quality of cell and if nominal voltage is 3.6 or 3.7). The Evo 3D battery is a 3.7 Volt (Nominal) LiIon battery, as is the battery in the Evo Shift, Evo 4G, and majority of other phones on the market. This means the MAX voltage the battery can take without danger of leakage, bursting, explosion, over-heating and DRASTIC/FAST life span reduction is 4.2 Volts.... not 4.21, 4.3, 4.385. The size of the battery doesn't matter... it can be 1500, 1750, 5000 mah... the max voltage per cell is 4.2 Volts. And this is exactly what my prior phone, the Evo 4G, used to reach and stay at until completely charged.

    After playing with the phones settings, switching chargers, and going to lower amp-hour charging rates with no change, I contacted Sprint. I spoke with several representatives, including an "Advanced Technician", who agreed the phone should not be getting as warm as it was (105+ in a 68 degree room) OR charge beyond 4.2 Volts... the phone was obviously broken and a new replacement Evo 3D was Next Day aired to me. It arrived Friday, July 1st.

    I plugged the new phone in and several hours later checked it's charge... it was at 97% and hovering in that area (as the 1st Evo 3D had done) and the Voltage was reading 4.350.... not as high as the previous phone, but way too high. It does not dropped below 4.2 Volts until the phone is unplugged and lost 15-20% of it's charge.

    This is a huge problem, because I did notice a LARGE reduction in battery life with the previous Evo 3D in only a period of ONE WEEK, because the battery was literally getting cooked. I live in a area with good coverage (3 to 4 bars) and past phones have never had to "work" to get signal. Both Evo 3D's have. Time to call Sprint again, and I did several hours ago.

    After describing the issue, I was transferred to another "Advanced Technical" agent. We spoke for awhile, and he did some basic trouble shooting, etc. Eventually what he said was pretty shocking... coming from the mouth of a Sprint Employee... he said he can't believe there hasn't been any "accidents" yet with the Evo 3D's battery heating and charging issues. He said there IS an issue with the Evo 3D over-heating, although no "official" releases or acknowledgements have come from Sprint or HTC because of the limited time the phone has been out, and complaints just starting to come in.

    He did not know if it was all of the Evo 3D phones or just a certain percentage of them, but over the past week he spoke to seven other Evo 3D customers, all of them having major issues with the phone getting very hot, some complaining about the battery life getting shorter in addition to the heat. The technician felt it was hardware issue with the phone, and not a software issue. He also commented on a customer who had called in with an Evo 3D, and while the phone was charging in his car, it started power-cycling repeatedly, even when unplugged. He was not able to stop it until pulling the battery, which was almost to hot to handle.

    The Technician wasn't able to tell me if there would be a fix or if an Over-The-Air fix is even possible (being that this is not an officially recognized problem AS OF YET, and that it is likely a hardware issue)... but strongly suggested I not let my 30 day return period elapse.

    This is no accusation, and I have nothing against Sprint... I've been a customer with them for 9 years, and I think the Evo 3D is a great phone (I really could care less about it's 3D capability... but the rest of the phone is great). I will happily keep the phone if this issue can be resolved... otherwise, I'll have to pull the 4G out of the drawer.

    So, that is just my experience. My apologies if I sound defensive in the comments at all.... I just ran into a few other people's comments on the forum who were commenting on the excess heat and the battery life of the phone dropping fast, and many responses they got blamed the OWNER of the phone for the problem (too many apps running, GPS, Wi-Fi and/or 4G running with other combos, etc.) I don't want to hear negative responses.... I'm just putting this out there so the problem with the phone can be addressed.

    Good luck... and if you have any doubts, check your phones voltage, and then check out the chemistry of LiIon/LiPo cells. I've worked and played with these battery cells for years, and believe you'll be experiencing the same problems if your BATTERY is getting more than 4.2 Volts (The chargers put out 5 or more volts to the PHONE.... the phone should only allow 4.2 of those volts to reach the phone).

    And one last thing... this occurs with the supplied HTC charger, as well as previous HTC chargers, and aftermarket chargers with lower amperage that I've tried. I took the battery out of the phone and charged it on a digital charger at 4.2 Volts..... it stayed cool and took a full charge.

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  2. marctronixx

    marctronixx Moderator Moderator

    could be anything... is it acting fine now? has it done this since?
  3. dhmx220

    dhmx220 Member

    Phone is functioning properly however I feel like I am not getting the battery life I should be getting.
  4. JimKnuckles

    JimKnuckles Well-Known Member

    My battery life is terrible. Just fully charged it and within 1 hour 20 min I've dropped 30%. This is with one phone call. I checked weather radar online and a few texts. My phone also gets hot. It gets at at the top of the phone where your ear would go on a call.
  5. blingeorkl

    blingeorkl Well-Known Member

    If it's heating up that much when you aren't using it, then it's either doing some major data communications or the processor is working on something and keeping your phone from sleeping. Might try uninstalling potentially problematic apps (or check with others with the same app and see if they're having similar issues). CPU cycles and whatnot turns into heat.
  6. You need to post what temperature the phone got to and what radios you had turned on. Sure you didn't leave the screen on and place the phone in the holster?
  7. Did you have 4G or WiFi on during the call? That's your problem.
  8. JimKnuckles

    JimKnuckles Well-Known Member

    I live in a non 4G area, and 3G coverage is great where I am. I wasn't at home so my WiFi was turned off
  9. If your phone drops 30% while on a call its either
    A: Your proximity sensor isn't turning the screen off during a call.
    B: You are in a bad coverage area
    C: You have an app running in the background of which you need to close for Force Stop.

    Did you pull your phone off the charger as soon as the light turned green or was the phone sitting on the charger of which you unplugged the phone and left the house? If you unplugged the phone and did not plug it back in your phone wasn't fully charged in the first place.
  10. ovrrdrive

    ovrrdrive Well-Known Member

    Classic runaway app syndrome...

    When I feel my phone start heating up I open task killer first and see if something is running that shouldn't, and if I don't see something obvious I do a restart. Also if you recently installed something weird uninstall it.

    My battery goes all day and only uses about 75-80%.
  11. AndroidSPCS

    AndroidSPCS Well-Known Member

    FYI this happens on my Evo 4G sometimes (running CM7). There is a known issue with the Evo 4G that sometimes it does not go to sleep, even when you press the power button to turn off the screen.

    When this happens I restart the Evo and all is well again.

    I wonder if the same bug is still resident in the Evo 3D.
  12. JimKnuckles

    JimKnuckles Well-Known Member

    I wasnt on a 30 minute call. It was a 5 minute call. The proximity sensor works fine, and I'm in a great coverage area. Maybe It's something running in the background but I doubt ir. I'm anal about making sure I close apps out when I'm done. I dont know, maybe I have a bad battery.
  13. lafester

    lafester Well-Known Member

    This phone gets noticeably hotter then the HTC incredible or evo from my experience.
    Probably because of the bigger battery. Problem is when it gets hot things like gps don't seem to work very well and battery drains quicker.
  14. PyroSporker

    PyroSporker Well-Known Member

    Interesting findings (referring to first post before thread merge). I'm still in the process of digesting all your info but I wonder if PC USB port charging would be any different than wall charging in this situation?
  15. EarlyMon

    EarlyMon The PearlyMon Moderator

    Interesting indeed. I just checked my Evo - it's charging at 4.2 V, if I'm to believe System Panel.

    My 3vo got very hot charging last night - that comes and goes - but as mentioned in another thread - I could have had a minor scalding to my ear, I took a call while it was hot. That was on the 1A wall charger. I noted at the time that it was 103 degF per System Panel.

    Just checked my 3vo - System Panel said charging from 4.28 to 4.31 V but the battery is cool now at 88.7 degF - that was USB charging at 0.5A from my laptop.

    Now that I think about it - it has gotten hot every time I've used the wall charger - but pretty sure never while USB laptop charging.

    Interesting indeed.

    I have retitled this, added a poll, removed the prefix - and made this a sticky thread.


    In my opinion - this is serious.
    spankly, ceabbott2, spy2jgc and 3 others like this.
  16. dhmx220

    dhmx220 Member

    The second day I had this phone I went to a movie and had 90 percent battery. I had everyting turned off that saves battery. The phone got really hot and battery dropped to 24 percent by the time the movie was over. Any idea what happened???
  17. EarlyMon

    EarlyMon The PearlyMon Moderator

    BTW - merged similar thread and finagled timestamp so OP would change.

    If you're subscribed to this thread, you may be in a new thread - please note the OP and participate in the poll.

    PS to mod staff - I can't decide if this is Support (original prefix) or General for the prefix.
    marctronixx likes this.
  18. jdsingle

    jdsingle Well-Known Member

    Thanks for posting your issues people. Glad to hear about any potential defects in the product. I hope this phone doesn't burn anyone.
  19. afterhourz1

    afterhourz1 New Member

    I've been charging my E3D for the past hour on the wall charger, but I usually turn it off. It's cool now. Maybe, having it on and using a wall / car charger makes a difference.
  20. Rose4uKy

    Rose4uKy Well-Known Member

    Only once since I had my phone did I notice it got hot. It was plugged into the wall with the original charger that came with the phone. I had a live wallpaper running and I noticed it getting hotter than normal but then it cooled down. I don't remember if I turned off the live wallpaper or not I am guessing I thought that was causing the problem and did. But I haven't noticed it being hot ever again.
  21. novox77

    novox77 Leeeroy Jennnkinnns! VIP Member

    After hearing about this thread, I started to charge my Evo 3D with the supplied wall charger + cable. Starting battery charge was about 28%. After an hour, the phone is reading 4128mV and 36.5 degrees C. Current charge is 68%. Phone feels a bit warm on the back, but nothing abnormal.

    Looks like mine is ok with wall charging. I will test usb charging tomorrow, since I do remember the back glass feeling unusually hot once.
    marctronixx likes this.
  22. strat1227

    strat1227 Well-Known Member

    mine tends to get warm when doing anything particularly intensive, but not any more than any of my old smartphones

    charging via USB at the moment at 3.85 Volts, nice and cool

    battery life is pretty crappy though, I guess that could be my fault, not really an issue since 90% of my time is spent in front of a computer and I keep my charger with me all the time
  23. EarlyMon

    EarlyMon The PearlyMon Moderator

    Troll posts removed.
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  24. mak916

    mak916 Well-Known Member

    I use Battery Indicator Pro. It has a temperature alarm in the settings menu. I set my alarm for 104 degrees F. My alarm has gone off using both the HTC OEM wall charger and the usb cord, none OEM, from my computer. I have a OtterBox Commuter case on my phone and you can feel the heat through it. It has not affected my battery life yet.
  25. EarlyMon

    EarlyMon The PearlyMon Moderator

    If the tools you use indicates voltage when charging, please post that info along with temperature - cheers, thanks! :)
    AC5FF and marctronixx like this.
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