yashsingh1/xdaforums huggingface dataset:
[Nexus One Q&A, Help & Troubleshooting] krypticos:
So far so good. I have received about 15-20 calls in the last 2 days and still haven't had the problem. Just thought I would update.
[Nexus One Q&A, Help & Troubleshooting] a_raj:
I'm still having the same problem. I sent my phone in for repair and they replaced the microphone. It didn't help at all. Has anyone come up with any solutions?

Thanks
[Nexus One Q&A, Help & Troubleshooting] blevinski:
i am a cellphone tech and have seen this twice so far. tried replacing the mic headset jack (headset jack can short out audio) and still nothing. mic works with loudspeaker but not in normal mode with earspeaker.

the first one was rooted. the second one still is stock.
[Nexus One Q&A, Help & Troubleshooting] blevinski:
ok today I was able to get my hands on a working nexus. and swapped the upper flex and that fixed it.

the only thing is that we ordered this part from one of our sources to fix a power button (which is on the same part) and it had this issue. so I had to replace it again
[Nexus One Q&A, Help & Troubleshooting] c65:
sorry, anyone does find solution for this problem?
[Nexus One Q&A, Help & Troubleshooting] davelis828:
One of the reasons i upgraded to a new HTC phone. Most of the times i would answer and just sit there saying hELLO??? because they couldnt hear for the first 3-4 seconds of a call.
[EVO 4G General] Krynj:
Plain and simple: When the Evo is fully charged, it begins running off its battery until you plug it back in. It DOES NOT trickle charge whatsoever after it reaches 100%. When you're using your Evo on the charger, and it's showing full 100% charge, it is running off the battery, not the AC plug. And then when you unplug it, well, we all know what happens next. The battery meter drops insanely fast to the actual charge of the battery, which could be very low, depending on how long it's been sitting idle at 100% on your charger.

So all those times you've charged your Evo overnight, only to take it to work the next day and be at 80% within an hour? Your Evo was running off its battery for what I'm guessing was most of the night. It takes my Evo about an hour to two hours to fully charge back to 100%. Let's say you put your Evo on the charger at 11PM, it'll reach full charge by 1AM at the latest, and then run off its battery until whenever you take it off the charger in the morning.

Workarounds?

1) Turn your Evo off while it's charging.

2) If you must leave it on for an alarm clock, put it in airplane mode and end all CPU intensive tasks to minimize battery drain.

3) When you wake up, unplug it for 10-20 minutes (still experimenting with this number), and then plug it back in to top it off. Once it reaches 100%, take it off the charger, and go about your day.

Try it out for yourself. When your Evo is 100% charged, take it off the charger immediately, and I highly doubt you will lose the 10%-15% within minutes. Please share your findings.
[EVO 4G General] mrono:
Er... Point of note, mine does it even if I pull it off the charger right when it turns green.
[EVO 4G General] sidepart:
Post some technical schematic or other type of proof that shows that this circuitry isn't available in the EVO. That will prove beyond a doubt if what your saying is true.

That being said, only a group of the most retarded electrical engineers would design a charging system as you've described. It is INSANELY easy to build Li-Polymer charging circuitry that does the following (and it pretty much has to do these):

1. Detects battery temperature, and disables charging as a protective measure. In an emergency case it should shut off the device it's powering to allow the battery to cool down. This is a design requirement, or else your house burns down as you dump water on a Lithium fire thinking it's going to put it out. If you have a HERO, you can easily test this. Running the wireless tethering, GPS/Navigation, and Music with the screen running heats up the phone a ton. You'll notice the status light blink green once, then red a couple of times. This means that it's plugged in but not charging. Cool the phone down and it turns solid red again (charging).

2. Disable charging cycle when battery reaches a certain voltage. VERY SIMPLE voltage detection circuitry! The designer can of course adjust a gap to have charging turn back on when it dips below a certain voltage. Usually since this circuitry can be made with a decent amount of precision, that "turn back on" voltage ends up being roughly when the battery discharges to maybe 99.5%. That's just a guess, I admit but there's no harm in having the circuit switch on and off, even if it's often.

There are also a few other circuits that prevent the cell from blowing up in your pocket, like a current sensor to prevent an overcurrent. There's also some stuff that prevents you from being able to discharge the cell below it's avalanche voltage. In case you don't know what that is, when a Li-Ion battery discharges to a certain voltage, it avalanches to 0 (quickly falls). If it hits that point, you've pretty much ruined the battery and it will never charge the same again.

Anyway, this is stuff they taught and had design labs on back in college. While I have no actual proof that the phone wasn't designed as the OP describes, I find it highly unlikely. If this is the behavior that the circuitry exhibits, I would find it easier to believe that it's a design flaw, probably because some idiot didn't compile the correct bill of materials.
[EVO 4G General] Krynj:
I haven't got any schematics or any sort of technical information on the subject. All I know is, it works wonders for me. When I take my Evo off the charger in the morning, it literally drops to ~90% within minutes. Once it does that, if I place it back on the charger for ~20 minutes, it charges back to 100% and stays there for 45 minutes to an hour.

I'd urge anybody who is noticing the immediate 10% to 15% drop in battery to give this a shot.
[EVO 4G General] cary328is:
I would turn it off while I'm charging it overnight, but I use it as my alarm clock :p
[EVO 4G General] theadlee:
Me Too

I am seeing the exact same behavior as the OP. This is really lame. Because of this, most people will end up losing 10% of their battery every day. Pretty lame.
[EVO 4G General] prestonr83:
I charge my phone overnight every night. Never noticed a problem and I just checked my battery and its at 88% and has been off the charger for 2.5hours so I'm not seeing the rapid discharge issue some people are seeing.
[EVO 4G General] Grims:
I don't think so man, I leave my screen on full brightness while it's charging, and if what you said was true it would go dead on the charger.

I think it's more likely the cells haven’t charged equally, so you get a big initial drop.
[EVO 4G General] Krynj:
I'm beginning to think that once the battery reaches 100% full, it runs off the battery until it reaches some arbitrary percentage. At which point it starts charging until it reaches 100% again, and then continues this cycle.

I'm testing a few other things right now. Part of me is convinced it reports 100% charge when it's actually below that level.
[EVO 4G General] sidepart:
I'll try this out to see if I can get the same kind of behavior. I guess I honestly haven't looked to see if the phone drops 10-15% after pulling it off.

This is what should be happening I believe, but I'd be surprised if it was set to such a huge swing like 10-15%

This is an interesting theory. I do know that when you have multiple Li-Ion cells in a battery pack, if they discharge unevenly, you have to go off of the lowest charged cell. Again, if a cell were to drop below the avalanche voltage, you'd ruin the pack all together. On the other hand, the circuitry should let ALL cells charge to 100% so it's even again. Maybe they screwed this up, that design isn't so easy! Perhaps it detects one cell as 100% and shuts off the charge. Therefore, one could surmise that if you started with an unevenly charged battery pack, you'd have an immediate decrease in charge to the rating of the lowest charged cell. The good news (maybe) is that this is sometimes implemented with software. That means that HTC could release a bug fix for this, or if we have a savvy dev, they could try to fix it. We just need to prove the theory though.

This is all just a guess, keep that in mind. If I notice something like this with my phone today, maybe I can tear apart the battery and measure the voltage on each cell (if it even has multiple cells). I have a spare, so maybe I'd be up for this. Krynj (or anyone), if you have the HTC Hero, try charging your battery pack with it, see if it exhibits the same behavior on the Hero itself. If it doesn't, then try putting it back into the EVO and see if after a night of charging, it still drops 10-15% after disconnecting it from the AC.
[EVO 4G General] apollooff320:
The reason why the battery dies so fast has something to do with the memory card. Charge your phone and take the SD card out and watch it stay at 100% for a long as time. Then do it again with the SD card in and watch it dip down fast.
[EVO 4G General] Tikerz:
Apple laptops don't charge unless battery is below 90%. If you plug in the AC and the battery is above 90%, it will just run off AC power but I don't think the battery drains any then.
[EVO 4G General] sidepart:
My battery life has been less than stellar, but I didn't notice it dropping 10-15% instantly off the charger. I did notice that it'd drop about 10% after driving to work with xiialive streaming, which was unusual to me. The battery would start running out after about 9 hours at work. I'd be in the yellow by the time I got home, and the battery would be complaining for a charge in the evening. So that's roughly 12 hours I would be getting out of the phone after normal use.

Since I'm suspecting an issue with the charging circuitry, I just recently tried charging my battery with the Hero. After it was fully charged, I put it back into my EVO last night and haven't charged it since. It's been running 13 hours, and is still nearly full green. The charge is at about 70%. I've been trying to graph the discharge all day too. It only dropped to 87% over night, dropped to 80% when I drove to work (xiialive), and then down to 74% after I spent some time setting up icons and modifying my home screen. This is...hands down a butt ton better than the past week.

I'm not using 4G.

WiFi is off.

3G is on.

GPS is on.

Not running a live wallpaper.

Sync is running at default settings.

Widgets that could be updating constantly:

I have the Clock/Weather HTC widget running.

I have the Dictionary.com "word of the day" widget.

I have the Friendstream Widget running.

Craigslist Craignotifica app is running, set to notify me with search results.

The results are inconclusive though. Yesterday, I wiped and re-flashed DamageControl 3.2.x from scratch (backed up all apps with Ti-Backup, this means Android Market won't be notifying me if there are app updates -grumble-). So, somewhere between re-flashing and also charging my battery with the Hero caused this turn around.
[EVO 4G General] wsantiagow:
Interesting.....Will have to give a try. Will report back later.
[EVO 4G General] pecosROB:
I'm waiting for some definitive results with the "use another charging device or battery" method. It seems that the EVO just sucks at recharging the battery since people who have used another phone or a separate charger seem to report better results.

I leave my phone off at night and charge it - when I turn it on in the morning it still drops 5-10% in the first 20 minutes. But during the day it drops REALLY slow, so I still can get about 13-16 hours before 15% easily.

I have manual account sync, 3g only, wifi at home, usually gps is off, auto backlight settings for screen, and I don't run too many apps in the background, I just use them when I need them.
[EVO 4G General] sdbarker:
Has anybody found a solution to this? It's really starting to bother me. I've noticed that I don't seem to have the issue if I charge -> recovery -> wipe battery stats -> reboot. That kind of leads me to believe that something is inaccurate about the battery stats and the phone instead uses the actual raw value provided by the battery instead of whatever it is that it does with the battery stats.
[EVO 4G General] jnewkirk10:
I can tell you this, I bought two of the cheap battery chargers off of ebay and I have two OEM evo batteries. I don't even plug my phone in anymore. I get an hour of standby at 100% from those chargers and it falls instantly when charging from the phone. I just run them down then swap them out. I couldn't be happier and they are only like 10 bucks each with 2 batteries each.
[EVO 4G General] gigabit:
can you post a link or ebay or where ever u bought it from?
[EVO 4G General] jnewkirk10:
Try this I'm doing it from the phone

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=250641711190&ssPageName=STRK:MEWNX:IT#ht_1991wt_913
[EVO 4G General] rhconcepts:
If you have apps on your sd card that are running then yes that could be the case. SD cards need power to work but I dont know how much they draw..
[EVO 4G General] sdbarker:
So based on your experience, it sounds like the problem is predicated on how the phone handles the charging?
[EVO 4G General] jnewkirk10:
Yes, I came over from the samsung moment and it had its own set of charging issues, but with these chargers the phone lasts a lot longer. Plus they have a usb jack to charge the phone with the supplied usb cable.
[EVO 4G General] xmellyx:
I believe cyanogen and some other devs have explained this before.

The battery charges to 100% and then runs off of battery until it drops to 90% then charges again. This pattern continues on.

They have posted some fixes like recalibrating your battery and such. I don't know the specific threads, but if you search around you can find it on xda.
[EVO 4G General] martyzidek:
I had that 10& drop problem.. not anymore.. the phone is horrible on charging... today i decided to use my htc tp2 since same battery.. guess what? No quick drop... and it took 2 hours to fully be charged with phone off.. now im only going to charge from the tp2 and switch batteries when needed... someone else did this also on another thread about using another phone charger and results were way better... its the phone... im so glad to by the 300 tp2 3 months ago and now its a charger but hey i have a extra battery also :) test out my findings if u would like

sent from my Evo
[EVO 4G General] lextildeath:
I have this issue only sometimes. Today I notices it dropped 5% in 4 minutes. While it was happening for a quick second, I saw a "refresh-ish" icon on the top left of the phone near the battery level indicator. It disappeared in an instant, and I never saw that before. Any one else notice this? Maybe the phone is doing something wacky while charging?
[EVO 4G General] martyzidek:
I decided to update.. the first 20 min my battery icon would look like its 75% full.. now i been on for a good hour and 1/8 of the icon is gone.. this is with low reception and on internet whole time.. way better than previous..actually just changed to where it would of been 15 min on phone while typing.. im happy. Just need to find out how to stop apps from running in background and startup.. i use atk and they pop back up in 2 min.

sent from my Evo
[EVO 4G General] Brutal-Force:
I laugh when I read battery threads. Everyone swears off of getting an extended battery. I have had a Sedio Extended Battery on both my G1 and my EVO. I rarely, if ever come home after a 10 hour day from work with less than 40% on my battery no matter how hard I push it. I have let my Pandora run all day, Sent 50 text messages, stayed on the phone for an hour with Screen at full brightness, 10min screen shut off, 4G enabled, Bluetooth.

If you really are having a hard time with the battery, do yourself the favor and get a Seidio battery, you won't regret it.
[EVO 4G General] kris54241:
Read **** ppl...it charges to 100 then will run down to 90-93% then beginning charging again...so least possible is a quick drop to 90% anything below that is usage
[EVO 4G General] willy900wonka:
Two issues immediately come to mind when reading this and other battery posts, 1 the charging system design inadequacies, 2 the use of "Autostarts" ( from market) to stop stuff from running.

1) When I get a new battery I manually charge it at 6v. The over voltage reaches cells which may not get fully charged other wise.

I have seen that the htc charging system cuts off at about 4.211 to 4.197 volts, as fully charged. The internal battery cut off is at 4.38 - 4.35 volts. /data/system/batterystats.bin can be erased and the HTC battery cycle startup followed, but it won't exceed the 4.2 setting.

2) Autostarts is very comprehensive in it's ability to control activity. There are several threads on using it.

As far as I can tell when the battery gets to 3%, start saving what you're doing, cause it will shut off very very soon.
[EVO 4G General] playya:
I have tried the battery fix per HTC and I have also added for my stock rom a program called overclock widget. It has a setting for when the light is off I set the processor to 245MHz.... try it I have gotten great battery life out of it so far with other tweaks. My battery took at least 4-5 hrs to drop from 100 - 90 with texts and a couple phone calls....
[EVO 4G General] palmdude:
I experience the same issue. 100% charged, then I lose 10% battery in 10min. After that it is stable. I am on stock froyo.
[EVO 4G General] FunkSoul:
I'm running CM6 with Snap and I'm getting about a full days worth of normal usage.. :/
[EVO 4G General] palmdude:
Me too, but the initial battery drop is interesting.
[EVO 4G General] tonyh703:
Damage Control probably helped a lot. My first week on damage control I had the phone unplugged for 36 hrs before I had to charge it -- normal use and some spotty 4G... I dont see those numbers anymore though.
[EVO 4G General] tonyh703:
increase battery life

This battery charging trick I used a while back relates to this thread. WARNING! ONLY USE IF YOU WANT TO MAXIMIZE THE LIFE OF YOUR BATTERY!

-Let charge drop down until the phone is dead (preferably right before you go to bed)

-When the LED is green (or when you wake up), unplug the phone for roughly 10-20 minutes

-Turn phone off

-Charge until LED is green

-Turn phone on, wait about 20 minutes

-Charge until LED is green

I went through this cycle maybe one more time, and I pulled 36 hours on one charge.

From what I heard, the first time your LED turns green, your phone is not actually 100% charged. I have no evidence on what is going on inside the circuitry, I just know some pretty sweet tricks.

Note: I was on DC3.2.3 (2.1) when I did this. I have not had the time, nor really needed to do this again as my battery lasts me all day (Fresh 3.1.0.1, Froyo)
[EVO 4G General] potna:
well count me in on this issue.

at 952pm 100%

1012pm 91 percent

sure it is on, but i dont have it doing anything.

this seems like a pretty big issue considering how bad this sweet phone is on battery anyways.

i guess i'll try the battery patch, if i can find it. i dint see it under support for this phone on htcs site.

Update; for what its worth I thought is share my new observations.

I almost called muster support but I thought I would try to research on my pane first. Well have only had thus phone since sunday and I bet I loadex 200 diff apps and widgets. So I did a clear storAge, format Oct what ever Android calls this deleting of all the crap I put on here. Bad things is I also tried a different battery as well. So deviated from my original research and changed too many things at once. Anyways here's my new results on battery life.

220pm 100%

342pm 91% I used gps for about 20 mins here

612pm 84%

752pm 81%

817pm 75% I was browsing xda

Anyways, I wanted to repost and suggest that maybe I was getting much better battery, even though I don't know why. My guess would be formatting took care of some problems. After all, I was getting all sorts of errors from something...and those issues are gone now too.
[EVO 4G General] BrianDigital:


I second that
[EVO 4G General] sdbarker:
That certainly helped overall battery performance, but didn't actually address the issue of the quick drop in and of itself.
[EVO 4G General] mjz147:
I was having the same issues, and have made a couple threads regarding my poor battery life.

I would take it off the charger and like many others my battery would drop 10% within 5 minutes of basic use. Maybe HTC thinks thats a good way to make a battery and charger work, but it seems that with moderate, like checking emails answering texts and doing some web browsing in the matter of 10 minutes of use my battery would drop 5% easily. I have wifi gps bluetooth, 4G off I am on CM6 and don't have anything besides my gmail syncinc.

I just tried using the USB connected to my PC to charge it, I took it off with 94% and with 2-3 minutes of use, it stayed on 94% and after 5 more minutes it went down to 93% so I am going to let it charge fully, if that works, I will be sticking to the USB charger, because battery has been terrible for me.

I would reccomend others trying USB to see if overall it helps.
[EVO 4G General] intriskman:
Try charging in an external charger if you have one. Guarantee you will never see the 10 to 15% drop off.

If you have an htc incredible which use the same battery you can also use that to charge your evo battery and never see the initial drop off.
[EVO 4G General] dglowe343:
Works for me. Been surfing the internet for almost a half hour and I'm at 97%.
[EVO 4G General] intriskman:
I bought a wall charger and 2 extra batteries for 10 bucks on ebay because I can stand it anymore.

I am tired of the doing the battery circle jerk. Waiting for led to turn green, turning the phone off, waiting for led to turn off, charging again, do the hocky pocky, put your left foot in, right hand up... And then it is fully charged.

I tried to complain to HTC but got some stupid response about how to extend my battery life by installing task killers,turning off the brightness and about 10 other unrelated things. I have up on HTC as well.

I guess if enough people raise a big stink, HTC will fix it unless its some hardware defect that they are not willing to acknowledge.
[EVO 4G General] mercuryhayes:
Is trickle charge battery related? software related? hardware related?

im on CM6....no battery tricks or anything...i stayed @ 100% for a hour

not saying i was doing heavy work on it...but before i went to CM6 i would have the "losing 10-15%" issue.

I would say its a SENSE ISSUE (because CM6 has zero sense)...but i didnt have this issue on my Hero.

i know before i went to cm6...google talk was a HUGE issue even when you chose to "not sign in automatically" it always seemed on. NOW, when you wanna sign on...you can see the process of signing in meaning it really wasnt on.
[EVO 4G General] snapcallem:
i really dont understand .. does no one here read? its been stated many times already its the way it charges... once the phone is charged to 100% it runs off battery power when it hits 90% it charges again to 100% and repeats this cycle so therefore if you take it off the charger once the light turns green then your fine if you leave it on for a while (your sleeping, or dont realize it) then it will start to drain and you will see a significant drop in battery once you unplug it from the charger
[EVO 4G General] kris54241:
Green light turns on at 90 percent...it's really not an issue...u can just charge your phone while its off n problem fixed. But I guess ppl gotta have at least one thing to complain about
[EVO 4G General] lath19:
I had the same scenario as the OP and figured out the same trick a month or so ago. Every morning I take my phone off the charger and play with it for a few minutes. It will drop to 88-90% in a few minutes and then I stick it back on to "top off" the charge.

Since I started doing this my battery life has significantly improved. I don't have any data or schematics to back it up but I can tell you without a doubt that it works.