How to keep your evo battery from discharging to 85% immediately after unplugging.Tips


Last Updated: 2010-11-05 05:20:31
  1. MrCast000

    MrCast000 Member

    So I realized a short while ago after changing one of my settings so the battery would show percentage. that right after I would take my phone off the charger the bloody thing would go from 100% to 85% in, lets say, less than 15 minutes.

    So I looked around and it turns out that there are a couple of people out there with the exact same issue as me. in fact quite a few... and if your one of the few then here is how I solved the problem..

    I bought the Seidio Multifunction Charger... I got it for about 21 bucks from amazon, shipped here so damn fast I didnt know what it was at first.. ... I am in no way affiliated with Seidio or amazon or any of the vendors of this product it is simply a product that I tried and loved..

    I have an extended battery so I dont REALLY need to worry about battery life.. but I paid money for the damn thing and I want every bit of juice I can get out of it. So the charger can charge an extra battery and also plugs into your phone for charge. I took out my extended battery and replaced it with the stock battery. Placed the extended battery on the wall charger and charged the phone as well.

    in the morning I decided to keep the stock battery in and see how the phone charger worked. the battery went down to about 98 in 15 mins then plateaued there till I used it... cool

    I switched to the extended battery and WHAT A DIFFERENCE! it went down to 98 in about 2-3 hours.. THIS is how the stock charger is supposed to work (but unfortunately doesnt) I've been using the charger for a week and am extremely happy with it. I highly recommend it if you want to get every bit of juice out of your battery this is definitely for you. here's a link from where I got it from

    Amazon.com: Seidio Multi-Function Battery Charger for Use with HTC Droid Incredible, HTC EVO 4G, Droid Eris and Touch Pro 2: Cell Phones & Accessories

    I even decided to go to the stock battery today and see how it worked with it charging on the dock and it took 9 hours to finally get it to 60%. I Hope this is helpful...

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  2. Hunterbeav

    Hunterbeav Well-Known Member

    Now if someone could only figure out how to fully charge extended battery in the phone. I don't want to pull battery every time I need to change it.
  3. chrisco_kid

    chrisco_kid Active Member

    i personally dont have a problem with charging it in the phone, ive been using the stock htc wall adapter, and have just found out that its junk, like throw away asap junk, so tonight im going to try a random ac to usb charger i have and see if its any better.
  4. Barats

    Barats Well-Known Member

    The only time I have a problem with this is if you leave on the charger and do not unplug it right when the light turns green. If you leave it on a long time after it's fully charged, it will drop down below 90 really quick.
  5. SouthernEvo

    SouthernEvo Well-Known Member

    I leave my phone on when I charge it at night . Mainly if someone needs to get ahold of me the phone is on (dont have a home phone what the hell is a home phone ?) . Or if I need to make an emergency call in the middle of the night I dont have to wait for a phone to start up . So I go to bed with the phone on and charging . I wake up in the morning and power off the phone and let it charge while its off . Usually at this time Im brushing my teeth taking a shower etc etc . I get done and dressed and the light is now green(phone off) . Power up the phone and go about my day . So far this is the only efficent way I have found to bypass the sudden drop . It still drops in charge down to 95% (Seidio 3500mah battery) but doesnt drop as far as if I just left it alone and simply unplugged first thing in the morning
  6. edlex

    edlex Well-Known Member

    I have the same seidio charger and I have to agree it does work great and the charge is noticeably better.
  7. MrCast000

    MrCast000 Member

    I just got back home, its been 5 1/2 hours and the battery is only at 99%. its well worth the trouble of having to take out the battery and let it charge while I used the stock one... doesn't bother me at all...

    though I do agree it would be awesome if we could just charge the damn thing without having to go through all this trouble of finding a good charger and everything.. but till htc fixes the problem this is a good solution for now..
  8. MrCast000

    MrCast000 Member


    I also thought it was just the htc adapter too... but I've tried everything from just using a usb cord and the computer... a usb cord and the iphone plug adapter... and even the seidio charger with the usb extention and plugging it directly into the phone... hell I've even sat by the phone on each trial and took it out right when it turned green.. still there was a major discharge (but still a little better than just using the stock charger)..

    I think it must have something to do with a mechanism within the phone itself, the only thing that has worked for me was pulling out the battery and directly charging it with the charger I mentioned.. It was a relief to finally find something that would charge the damn thing.. if you all really care about this issue I highly recommend writing a complaint to htc and even reporting the issue to sprint the next time your in... this phone is phenomenal, it just has a few bugs that need to be worked out..

    here is a link to make it that much easier...

    HTC Mobile Phones - Customer Service - E-mail Support
    Hunterbeav likes this.
  9. Hunterbeav

    Hunterbeav Well-Known Member

    just sent a message to them thanks MrCastOOO
  10. this n00b again

    this n00b again Active Member

    what would be a great and/or upgrade battery to use with this seido charger in the evo, so we could have multiple batteries?
  11. wojosama

    wojosama Member

    Just putting this out there:
    There's a few things about these batteries that a lot of people don't seem to know. Trickle charging these things can make them go boom and is extremely bad, so, when the battery hits 100% it stops charging and will not charge again until the battery reaches 90%. The light on the phone will be green the entire time even when it is falling back to 90 before it begins charging again which usually accounts for the "sudden drop below 90" that people experience. If you take the phone off the charger the moment you see it go from 99 to 100 then you won't see this drop.
    Now I don't know anything about the seidio charger but it almost sounds like it IS trickle charging the batteries, i.e. the moment the battery falls below 100% it pumps juice into it, bringing it back to 100% and keeps repeating the process. I certainly hope that is not the case as your batteries are not going to survive long with that kind of charging.
    Hope this helps someone.
    dgrobe2112 likes this.
  12. Droid_Genius

    Droid_Genius Well-Known Member

    Wonder how many of us will get this step right LOL!
  13. wojosama

    wojosama Member

    lol I didn't mean it as instructions, I just meant to make sure you go into the settings and see what the battery is really at when you take it off the charger and not just assume that because the light is green it's at 100%.
    As a side note, I did actually have to wait for it to hit exactly 100% yesterday morning because I was wiping battery stats and needed to ensure it was completely charged before doing so, and it was.. well not very fun to say it politely. It was like watching water boil.. only not as fast.
  14. MrCast000

    MrCast000 Member

    Not a problem Hunterbeav.


    Wojosoma, As far as I know the seidio charger isn't over charging the battery. I've forgotten it on there for a couple of hours past from when I was supposed to take it out and at that point I'm expecting it to be hot as hell but its just chillin on the charger with a green light at room temp. So I dont believe its over charging it but I could be wrong. I'd assume the thing would get hot if it were..


    this n00b again... I highly recommend the seidio 3500mah battery if your looking to upgrade.. the thing is bad assed. at worst, when using every imaginable thing on the evo for a whole day I still have AT LEAST 60% charge left. and if not used often then it could go on for a couple of days.. Mind you its a bit thicker but if you dont mind that, then this is deff for you... GOD I LOVE THIS EVO!
  15. msvnlu

    msvnlu Active Member

    Can someone confirm this extended charge will do the trick with stock/other 1500mah batteries for our EVO's? Thanks.
  16. Howard Packer

    Howard Packer Well-Known Member

    Evo's aren't the only phone with this issue. I have an Epic/Galaxy S, and I have had the same issue. Shows 100 percent, and then drops to 85 within almost seconds after disconnecting.

    Last night, after the phone showed a full charge, I actually shut the phone down overnight instead of leaving on and charging. The next morning, I connected the USB with the phone powered off, and I was surprised to find that the battery icon that comes up showed a less than full charge. Hard to say exactly the level, but I would say either 90 or 85 percent. Hmmm, does that 85 to 90 sound familiar?

    This time, I left the phone charging for a while more before powering on and disconnecting. I didn't have time or the patience to wait until 100 percent. However, I think that I finally took it off of the USB at like 97 or 98. This time, it stayed there and dropped slowly, just like I would think that it should.

    I am going to try the same thing tonight to see if that is what finally fixes things.
  17. PGR

    PGR Well-Known Member

    I have an interesting observation about this battery phenomenon: Everyone seems so focussed on what their battery gauge/meter does right off the charger that they're not paying any attention to how long the phone actually runs before it requires a recharge. Maybe some of you are paying attention, but you're not posting anything about it.

    So my question is: Has anyone compared how long a phone will actually run on a battery which quickly drops to ~85% when you remove the charger to how long the phone will actually run (on the same battery) if you do whatever tricks you do to keep that initial ~15% drop from happening? Is there any significant difference in run time?

    Please note that I won't have an Evo of my own until Nov. 1 (when I'm eligible for full upgrade discount pricing) so I haven't been able to do any testing of my own, but after following this and several other threads about this battery "issue" I really suspect that the problem has little to do with how charged the battery actually is and more to do with how the % charge display is calibrated. I've posted more detailed observations about this HERE if you're interested:

    I also happen to own some pretty sophisticated test instruments including a CBA III and a computer-controlled battery charger/cycler which I'm looking forward to using to collect some empirical data on the subject once I get my phone, but I'd still like to hear your input on my question about run time.

    Pete
  18. chrisco_kid

    chrisco_kid Active Member

    i think the issue is this: if you charge it with the phone on, it hits 100% and wont charge again til 90%~ right? well the phone is on, so its running processes and thus using battery life, if the battery is out of the phone and on a charger, theres nothing draining it.
  19. msvnlu

    msvnlu Active Member

    Ok guys/gals, what I did was purchase one; with shipping it was like 27ish. But I like to say that I do use Battery Left Pro (paid verion) its a very good app to tell me about my batteries (multiple ones). I have one cheap china external charge, that gives me about 94% battery when I put the full charged battery into my phone, and I have two other different charging docks with external charger. when I use those, I get about 96% reading. Im going to see if this is really that good. And I paid good money like 30ish bucks for one desktop dock charger, and the other one was more on the cheaper side. Im just one of those anal gal, so Im just trying it for the heck of it. I'll report back if it really gives a true 100% reading for those of you who might be interested.
  20. ArthurIhde

    ArthurIhde Well-Known Member

    that's a great idea [​IMG]
  21. jbrooks544

    jbrooks544 Member

    I have the Seidio 3500mah and i really dig it. My experience is that it seems to float charge the battery. It will get to 100% and the lowest I find it after a few minutes is 95%. So mine seems to float between 100 and 95%, which I feel is the correct way to charge it. However, I don't like being down to or below 95% 10 minutes after picking up my phone in the AM. What I do, is I unplug my phone for a minute when I wake up. I then plug it back in while I eat breakfast, shower and get dressed. When I unplug it after this 45 minute routine, it is typically back to 98 - 100% charged, no problem. Oh, and I use a wall to usb set from a Kindle 2. My only problem with the 3500 is the back broke a latch tooth and I have to get a new back.
  22. msvnlu

    msvnlu Active Member

    Im more into trying to find out if a BRAND name external charger will solve this issue and giving it full juice @ 100%, not starting/dropping to 96%. We all know that trickleing will work.



    update: 11/08/10 -I got my charger in the mail today. Lets see if it's a pass or fail

    update 11/14/10- This external charge is not better than my other dock external chargers. When fully charged a few batteries, its not 100% fully charge, only up to 98%, like my other external chargers. Dont ge me wrong, its a good one, but nothing special compared to my other external chargers.

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