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HTC s640 Battery Issues?

Hi Folks,
My s640 seems to have developed an issue with the battery. It will get to about 50% and stay there for most of the day then suddenly I get the low and critical warnings, then off. The warnings then off sequence happens within about 10 seconds of getting the first warning. On one occasion I got the low and critical warnings, but then the phone reported 268% battery remaining.
Is/has anyone else experienced this issue or anything similar? I'm wondering if it is the phone or the battery.
Thanks.

I am having the same trouble.
I'll fully Charge my battery and then disconnect it and us it for about 10 minutes and suddenly it will drop my call, turn off my bluetooth and disable the radio (network), and if I don't plug it in, within 30 seconds it shuts off. If I remove the battery, hold the power button for 5 seconds and the put the battery back in and turn it on then I have my battery shows 90+% free.
I'm not sure if it's the battery or the phone.

have you tried running the battery till it won't turn on the phone. Then charging it up again?
maybe a hard reset may help?

daroota said:
I am having the same trouble.
I'll fully Charge my battery and then disconnect it and us it for about 10 minutes and suddenly it will drop my call, turn off my bluetooth and disable the radio (network), and if I don't plug it in, within 30 seconds it shuts off. If I remove the battery, hold the power button for 5 seconds and the put the battery back in and turn it on then I have my battery shows 90+% free.
I'm not sure if it's the battery or the phone.
Click to expand...
Click to collapse
Yes I too am having this issue since rom upgrade so is a friend, he just purchased new battery from Telus but they shipped wrong one. Will update if new battery resolves his issues. I went throught three phones with brand new battery they all did same thing Battery is not HTC 20 dolllar aftermarket one (just before warranty expired). Have gotten 400 credit for new phone but nothing like this one out there except Touch Pro Diamond and I hear even with new battery that phone battery life is too short to last through day. Get feeling Telus broke something in software with Rom update used to be when phone battery was expiring a red light would blink (opposite of blue tooth light) now it is only notifications from WM that phone battery is critically low and shuts of radio etc. yet you plug phone in and it's charged 10 minutes later makes no sense. Rechargable batteries voltage change with charge the interesting thing when I pull my battery the voltage is the same charged or just after error messages (I have a very expensive True RMS Voltmeter from work that has been calibrated in last year) but without load this isn't an accurate test. Does make me think something is not right and beleive it software related for more see my post in Howrds Forums under phone model.

I am having the same issue after the ROM update, not sure if it's the cause. Already replaced a battery on warranty for not holding charge. But now I have had the phone over a year so telus wants me to buy a battery for $80. I know based on this information i'll be wasting my money.
i want stuff to work for more than a year what the hell is money good for?

any fixes or updates wether the new battery helped??

I replaced the battery on my phone and these odd issue I was having are gone guess we have to face the fact that you need to purchase a replacement once a year hopefully it will last a year my problems start just short of a year.

I just got my new battery from here http://www.longlast-battery.com/productCart/pc/viewPrd.asp?idcategory=0&idproduct=17483
I will post after I get it full charged and try it for a day or two
where did you get yours from?

well the battery didn't even last an hour on the way to work.
#1 it was similar but 2-3mm shorter than the OEM and barely touched the contacts on the phone.
#2 charged overnight ok and said 100% charged then withing 20min it said low battery then died shortly after
#3 would not charge a second time (on 2 of my wall chargers, two usb and 1 car charger) Just the red light would light up. Tried jiggling the battery but nothing not even a flashing red light.
so much for a battery bought from the US. Waiting for RMA

typhoonk said:
well the battery didn't even last an hour on the way to work.
#1 it was similar but 2-3mm shorter than the OEM and barely touched the contacts on the phone.
#2 charged overnight ok and said 100% charged then withing 20min it said low battery then died shortly after
#3 would not charge a second time (on 2 of my wall chargers, two usb and 1 car charger) Just the red light would light up. Tried jiggling the battery but nothing not even a flashing red light.
so much for a battery bought from the US. Waiting for RMA
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Click to collapse
I purchased a battery from E-bay and it would not charge at all. Existing charge in battery was enough for me to know that my issues were battery related after all as phone lasted for quite awhile. Tried charging ebay battery for close to 12 hours no go, so returned it for full refund. Called Telus because my calls in were while I was under warranty still but it had since expired they credited my account for the price of battery over a couple of years (1.5 batteries really) to make up for battery not lasting more than a year...hope that makes sense. Doubt I will buy another HTC with todays battery technology there is no reason one of these batties can't last 2-3 years if taken care of. Just a money grab telus/htc on their part in my opinion.

Gave the battery I got from longlast-battery another try.
the battery is CS-DS640SL 1250mAh 3.7V
I got it to charge by turning off the phone and plugging it into a usb port on my PC. Took about 6 hours to charge to 100%.
Won't charge when phone is on which is weird. Even at 90+% charge.
Lasted a full day without charging. That's a good thing I guess. Even when I restarted, it didn't lose the typical 10% drop in charge the other battery does.
I'm going to discharge it and charge it three times to see if it starts working properly and letting me charge it normally. Was a tip someone gave me. Won't hurt anything, and if it doesn't work I can still send it back.
Curious what you guys think. do you think it's a bad battery and I should just get an exchange, or I should just get my money back, and shell out the $100+ for a Telus battery?

Well the longlast battery test failed badly. Lasted about half a day with minimum calls and data use. No wifi no bluetooth. After it died I took it out and let it sit for a bit as the battery was fairly warm. After I put it back in, it said I had about %40 left. Very odd. And it lasted for another two hours before dying.
Now it's back at the won't charge stage. So I finally got an RMA number, so this one is going back.
Hitting Telus on the way home to pony up for a new battery. Getting the extended one as it's only $20 more. Hopefully this one will last more than a year - then I can get another phone (got to love 3yr retention contracts that end early )

I've created a Facebook group to act as a petition for everyone with the notorious battery life problem.
Join the group here, it's open to everyone:
http://www.facebook.com/group.php?gid=100925126406
Share your experiences dealing with Telus positive or negative ones.. or tell us if you've been able to fix the problem by hacking the device. Anything at all that will help the people still stuck with this phone.

I have done some efforts regarding battery capacity measurement Just lookup this thread: http://forum.xda-developers.com/showthread.php?p=5558383#post5558383

[Q] Did my phone just brick itself?

On Sunday evening my phone was at about 60% battery from a full day, which was pretty impressive considering I had been played some games, responding to texts constantly and checking email. I decided to not plug in my phone that night to see how much battery life I could actually get continuing into the next day. I woke up the next morning and my battery had not dropped a %. At first I was ecstatic because I finally thought my battery woes were over....I was wrong.
As soon as I left the house Monday morning on my way to class, while streaming pandora, my phone alerted me of 'low battery'. I checked my battery again and it now said 58%. I assumed this was normal because streaming pandora does consume quite a bit of battery. Less than a minute later my phone shut off completely. I did not have a charger with me so I was not able to plug the phone in again til later that afternoon. When I did plug it in, the battery was was completely drained, at 1%. I'm assuming for some reason the status of my battery was not being updated correctly via my battery widget and through settings -> about phone -> status.
I fully charged my phone that same day and had no problems using it last night or even this morning. But on my way home today from class, my battery was at 70% which is normal for me, but for some reason it just completely shut off. No battery warning or anything. When I arrived at home today I tried pulling the battery and plugging it in the the charger and everything else I could think of. Even charging via my laptops usb. Nothing seems to be working.
The phone is not rooted and everything is completely stock. I don't any apps that effect the performance of the phone or anything of the sort. Just stock running adw.
Any suggestions before I call up T-mobile?
Thanks in advance for those who read this whole thing and provide useful feedback
EDIT: Also, I have not used any HDMI cables on this device. I read some people are experiencing similar issues when using HDMI, that is not the case here.

Call TMobile.

I'd say call t-mobile like ^

I did just that.
I was hoping someone could have provided a solution to this but I believe this is due to hardware failure. Lost lots of important photos/texts :\
I went to the T-mobile store today and even tried a new battery but the phone still wouldn't power on. They will be sending me a new one within the next week.
Which leads me to believe that T-mobile is in fact not "out of stock" as they claim to be in all of their stores and on their website. Definitely some quality control going on as they are holding back on selling this phone til the GB update.

[Q] Random Shutdown Issues - Bad Battery?

Hey all,
I am currently running CM9 (bhundven's 7-29 herring build) on my Galaxy S 4G, and I am having some problems with random shutdown. This has only been happening for the past few days or so (EDIT: and I have been running CM9 for about three months with no issues). It seems that the phone works perfectly fine until the charge gets to about 60% starting from a full charge, and then the phone randomly shuts off. The phone will not start back up unless I have it plugged into the wall, and the results are a little unpredictable. The first time it happened, I turned it back on and it said the battery was at 1% and charging. Now, after clearing the battery stats, it reboots to 60% battery. It seems to work perfectly fine after that, and yesterday it went all the way down to about 12% before I started charging it again. It just happened again today, and when I turned it back on it said it was at about 60%.
My charging habits are pretty bad for Li-Ion batteries; I tend to let the charge drop all the way to about 10% or 5% before I plug it in and charge it all night, way past what is necessary to get to 100%.
The battery does look a tad swollen, but I might be exaggerating.
I just wanted to know if this is a bad battery with 100% certainty, or could it be a problem with the OS or internal parts, etc. I can easily buy another battery online, and I probably will.
EDIT: Also, I have had some overheating issues with this phone, and I can often smell electrical smoke in the charger port area behind the speaker, which is why I say it might be an internal parts issue.
Thanks everyone,
cpkelley94

You need a new battery. I was having the same issue lime 3 months ago; phone was dying at half charge the when it rebooted, battery would be dead. Then when I plugged it in, it would charge in 20 minutes and the repeat the cycle. Put the battery on a table to see if its still flat. If it rocks or spins excessively, its usually an indicator of a bad cell.

Mine JUST started doing the exact same thing last week. Battery is definitely swollen. I replaced it just this evening and I'm in the process of doing a full charge from 0->100 to see how things go. I'm 99.999% sure the battery was dead. Replace yours.

Sorry for the thread necro, but I wanted to thank the OP for asking this question and to the helpful replies. We just had a heat wave here and maybe coincidentally to that, I've been having random shutdown problems. Having looked at this thread and my battery, I can tell that I definitely need to replace that. So thanks, all!

Battery calibration error?

As of maybe a couple of months, my phone shuts off almost immediately after getting to 20% it turns off and when plugged starts charging from 16% or so. Any idea what may be causing this and how to fix it?

I have the same issue mate. It happened twice for me. Was using Snapchat and the battery drained down to 19% and then it suddenly showed 0% and the phone shut down. And then after I charged it for a bit, it showed around 20%

I have same problem here, guess factory reset might helps.

Same issue on my friend's Honor 8.

Mine turns off at random percentages. Sometimes it happens at 20%, 10% and most recently 67%. I'm wondering if changing the battery would fix the issue

same issue here disappeared for like 2 months and it happened today

This suddenly happened to me today, I was using Snapchat and I took a pic, was writing a caption to send to my friends and all of a sudden it dropped to 0% and shut off, even though it was already at low battery I know It still had enough life for me to be able to send the snap and listen to music. What sucks is that I didn't look at the battery percentage before It turned off but when I turned it back on it was at 13%, even though when I tried turning it on from before it kept telling me 0% and shutting off repeatedly

i noticed that when i plugged in the charger and checked the recents all the apps opened were showing up.....looks like its doing soft reboot but cant complete the reboot......smh!!!

Same problem here

Rommco05 said:
This phones are rooted or no?
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Click to collapse
Rooted stock

I realize that it happens when it's really cold outside. It happened to me a second time today when I was outside in the cold, so I guess the phone turns off to prevent anything from happening internally, because it shut off at around 50% of battery and when I turned it back on it wasn't 0% like it had told me

I'm switching out the battery today I'll let you guys know if it fixes the issue

No root till now fully stock.

Well replacing the battery fixed the issue. I also deleted battery stats once it was charged to 100%

Same issue here. My device goes from 20% to 1% in about 2 seconds. And then when i charge the phone, it shows charging from 19%. It happens all the time.

Hi, had same but my first time died when I was flying drone with it, it was at 17% of bat. I was so nervous that I lose my drone that I forgot to check what was the problem with bat. Now when I was trying to film my daughter skiing after 2min outside of my pocket it turned off although bat. was at 78% and tem. outside was -3*C. Yesterday I've send it on warranty, I let you know what they say (if anything). Mine H8 is stock no root.
Wander is there any app than can check number of cycles of battery, this way I will know for sure if Service replaced battery or only told that it was replaced

erraz said:
Well replacing the battery fixed the issue. I also deleted battery stats once it was charged to 100%
Click to expand...
Click to collapse
Did you guys need root to delete the battery stats?
biniek said:
Hi, had same but my first time died when I was flying drone with it, it was at 17% of bat. I was so nervous that I lose my drone that I forgot to check what was the problem with bat. Now when I was trying to film my daughter skiing after 2min outside of my pocket it turned off although bat. was at 78% and tem. outside was -3*C. Yesterday I've send it on warranty, I let you know what they say (if anything). Mine H8 is stock no root.
Wander is there any app than can check number of cycles of battery, this way I will know for sure if Service replaced battery or only told that it was replaced
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Did the service center fix the issue?

Yes, they replaced battery, screen and frame, actually they only left old back panel and MB. Screen was replaced because of dead pixels (but I didn't saw any before). After a year, I think I have same issue with battery again but this time no warranty anymore ;(

S7 started turning off, Replaced battery and same thing, Thinks its dead?

Hey guys, As title says, So the story on this thing lol Bought it new I believe 1.5-2 years ago, battery got bad, so this spring in february I replaced the battery my self, I had ordered 2, Both certainly a genuine battery, I had a S7 so I wanted a spare for mine when IT came time. After battery replacement phone was great again, good as new! then as of 3 days ago random shut offs. battery reads 80% shut off, Then I noticed If I left it off for a few hours or all night and turn it on in the am 0%! Tried charging and It's not taking a charge really, It went to 9% and stayed there for ever and was getting hot so I didn't want to risk it. ok so bad battery, this morning I swapped in my OTHER spare new battery, and Let it run up to 100% before turning on for first time, All seemed good! then all the sudden after 6 hours (before it was like every 10 minutes it'd shut off.) It started doing it again, Same thing battery is dead it figures, But it can't be.
Thinking perhaps the board it's self or something just ain't right? :\ Any thing to check or tips/tricks? I tried googling and came up empty handed.

Octanee said:
Hey guys, As title says, So the story on this thing lol Bought it new I believe 1.5-2 years ago, battery got bad, so this spring in february I replaced the battery my self, I had ordered 2, Both certainly a genuine battery, I had a S7 so I wanted a spare for mine when IT came time. After battery replacement phone was great again, good as new! then as of 3 days ago random shut offs. battery reads 80% shut off, Then I noticed If I left it off for a few hours or all night and turn it on in the am 0%! Tried charging and It's not taking a charge really, It went to 9% and stayed there for ever and was getting hot so I didn't want to risk it. ok so bad battery, this morning I swapped in my OTHER spare new battery, and Let it run up to 100% before turning on for first time, All seemed good! then all the sudden after 6 hours (before it was like every 10 minutes it'd shut off.) It started doing it again, Same thing battery is dead it figures, But it can't be.
Thinking perhaps the board it's self or something just ain't right? :\ Any thing to check or tips/tricks? I tried googling and came up empty handed.
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Click to collapse
It's likely the batteries you have are not genuine. Fake copies don't have a control chip which interfaces with the device. Your phone is shutting down to protect itself from overheating and other problems caused by copies.
There are some great copies out there but trust me they're still copies.

cooltt said:
It's likely the batteries you have are not genuine. Fake copies don't have a control chip which interfaces with the device. Your phone is shutting down to protect itself from overheating and other problems caused by copies.
There are some great copies out there but trust me they're still copies.
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Click to collapse
Yeah that's for sure on the copies, I had looked at how to compare what I had VS the fake ones and they seemed to be genuine? The batteries came from 2 seperate sources as well so hard to say, if the first one I put in was a copy then it did last a while but surprised then that my 2nd one never made it more than a few hours and the same issue. But you just never know. Everybody claims your buying a genuine battery but I'd assume the listing prices are tell tale of a fake/copy lol

Monitoring the battery and either the voltage sensor is bad or the battery, it'll chwrge and say it's full but yet voltage goes to 3.4v, then if I plug it in again it'll go up to 4.2v, once I unplug it, it drops of course, I was using a battery burn program and Itll drop from r. 2 to 3.4 right away, I got it to run for 15 mins one time then it dropped off, otherwise another time from 4.2v it dropped to 3.0 then shut off after starting th test in like 20 seconds, reports battery immediately as 17% after re booting.
This battery sat for a while so will try a 3rd fresh battery and hopefully genuine, though I suspect my past 2 were genuine.

Wanted to update this for anybody who may find this thread off google. I got the same replacement battery again Which was the fix, Asked the seller and they said they'd shoot me a new battery, Again whether genuine or not... Well they claim genuine. I let the phone charge to full and Performed the battery draw test by running the 2 apps to bog the phone down and make everything run to 100%. ran like that 0 issues for about 2 hours, Voltage was very stable the whole way through, before It would maybe hold for a few mins then shoot right down from 4.0 to ~3.2V. Even now after a hour It was still well above 3.7V. My old s7 battery was exactly that, sat unused on my shelf for ~2 years because it was mis-placed and even installed it was no good either.