Battery Level Drops After Going Off The Charger.Support


  1. LBPHeretic

    LBPHeretic Well-Known Member

    My wife has a Sprint HTC EVO 4G that is currently stock and unrooted on Android 2.3 with HTC Sense. Lately, she has been having this issue where, once in a while, she will take the handset off the charger after it had been charging overnight and as soon as she does that the battery level drops below half full.

    Now, if this were my handset I would probably think about recalibrating the battery statistics, but since this is a stock unrooted handset, does anyone have any ideas of what might be causing this and a possible solution? It does not happen every time she pulls it off the charger, but it happens enough to annoy her, especially if she needs a full charge when she is on her way to work.

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  2. argedion

    argedion The TechnoFrog VIP Member

    Is the phone on or off during charge process.

    BTW I am thinking recalibrate to. How old is the battery?
  3. LBPHeretic

    LBPHeretic Well-Known Member

    She charges her Sprint HTC EVO 4G while it is on. Her handset and its battery is about five months old now as she got it in mid July.

    I would recalibrate it, but it is not rooted. If that ends up being the only way, I may just have to root it and wipe the battery statistics, but I was sort of hoping for a non root solution.
  4. argedion

    argedion The TechnoFrog VIP Member

    Amazon has 2 1800 ma batteries with chargers for like 12 dollars. There is a thread in the all root section called sharing the battery love. It was initiated by Granite I would link but I'm on phone and cant
    Granite1 and andygu3 like this.
  5. argedion

    argedion The TechnoFrog VIP Member


    I hear ya. I charge mine on and mostly through computer.
  6. Granite1

    Granite1 Zercron Encrusted Tweezer Moderator

    Sounds like once it charges to full, it stops trickling mA completely. Usually it will do this until the charge goes down in the low 90's then kick back on. This is the reason Evo's get the dreaded 10% drop really fast after its disconnected from the charger. Problem is it seems like your evo is completely dropping the charge.
    I wonder if any of the calibration apps on the market work without root? I never use em, I do it the old school way Andy taught me on the Hero. ;)
    I'll try to do a Google search tonight when I get home from work and see what pops up. And if I forget, just give a nice bump to remind me. :D
    andygu3 and LBPHeretic like this.
  7. LBPHeretic

    LBPHeretic Well-Known Member

    Thanks, Granite1. I follow the same method andygu3 does for calibrating batteries, but a non root solution would be cool. :)

    It is funny that the Sprint HTC EVO 4G stops trickle charging below 99%. My Sprint HTC Hero would never instantly drop below anything lower than 99% after taking it off the charger. Could you recommend a battery calibration app or two? I appreciate your help on this, since my wife is starting to get peeved about it. :D
    andygu3 likes this.
  8. Palmetto Fellow

    Palmetto Fellow Well-Known Member

    The only non rooted way is by factory default I hear. This is confidently, the main reason I rooted.

    EDIT:

    LOL...looks like Swype thought coincidently was confidently in my sentence above
  9. argedion

    argedion The TechnoFrog VIP Member

    what state is the battery in when she charges it? is it like 10% or less or over 10%? I know if I don't wait for it to go down to the 10% mark I'll sometimes see a fast drop. not sure if this is what she has going on or not. I also let it completely drain down and power off about once a week plug it in and leave it off over night.
  10. LBPHeretic

    LBPHeretic Well-Known Member

    I am not completely sure how low it is when she starts charging her handset. I would surmise that anywhere from 10% to 30% is when she plugs it in.

    I do the same thing with letting it completely drain to zero on my devices. However, I do that about once a month or every other month.
    andygu3 likes this.
  11. argedion

    argedion The TechnoFrog VIP Member

    yeah if i do it every week i'm lucky. here is that link i had mentioned earlier if interested

    http://www.amazon.com/exec/obidos/r...h=http://www.amazon.com/gp/product/B004WPCS18

    its a good deal. and if atleast one dies she has the other ( i would assume you give her one and you keep one then both have two)
  12. LBPHeretic

    LBPHeretic Well-Known Member

    What is weird is that the issue does not consistently occur. She will charge it up and most of the time she gets a normal battery reading after taking her handset off the charger.

    When it is normal, she gets great battery life. Even, when the charge is down, it lasts all day which is what led me to believe it was just not reading the proper battery charge even when it was full.
  13. andygu3

    andygu3 Well-Known Member

    LB, I would just root the thing, you have way too much knowledge on rooted phones for you not to root it;) You understand the risks and benefits from having a rooted phone, I would root it:D

    But like you said, charging to full and then allowing the phone to drain completely to 0% then recharging back to 100% may be the only way to recalibrate the battery without it being rooted.
    ocnbrze and Granite1 like this.
  14. Granite1

    Granite1 Zercron Encrusted Tweezer Moderator

    I agree with you here Andy. I don't think there is any other way to get a good calibration without root, or a factory reset and complete discharge and recharge.

    LB, you could root it and just not tell her. I did that to the wife's (MINE :mad:) Hero and she really doesn't care. As long as she likes the ROM I put on it. :D
    ocnbrze likes this.
  15. Displacedmic

    Displacedmic Active Member

    agreed. of all the reasons i rooted my phone, recalibrating the battery has actually turned out to be the best by far. who knew? it's like a trip to a chiropractor!

    resetting bat in recovery mode is nice, but i really like the batterycalibration app too
  16. LBPHeretic

    LBPHeretic Well-Known Member

    Thanks for the kind words, andygu3. I gained a lot of that knowledge from you and the myriads of other knowledgeable folks on Android Forums. ;)

    I completely agree with regards to rooting it. It is my wife's handset, but she is open to me rooting it and such. I was really just looking for a quick fix since the holiday season leaves me so busy. Now that I have some time off, a rooting I will go. :D
  17. LBPHeretic

    LBPHeretic Well-Known Member

    Haha. Luckily, she does not mind me rooting it. :D

    It was more about me finding time to do it for her. The holidays have given me so time, so I will get on it. ;)

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