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Hi all,
I am puzzled by my problem. I am using Virtuous 2.7 + King's BFS kernel #4.
My phone battery will drop quickly from 100% to 92% right after unplugged from the power cord. By quickly, I meant I did not use the phone, killed all tasks, and battery will drop to 92% literally in minutes.
Bump charging, wiping battery stats, wiping dalvik cache, killing all tasks are not helping at all. I don't have SetCPU, but someone in the forum mentioned they have SetCPU, and it is not helping either.
Is anyone having this problem? Does anyone have any idea on how to solve this?
Please help.
Thank you!!!
chillmeow said:
Hi all,
I am puzzled by my problem. I am using Virtuous 2.7 + King's BFS kernel #4.
My phone battery will drop quickly from 100% to 92% right after unplugged from the power cord. By quickly, I meant I did not use the phone, killed all tasks, and battery will drop to 92% literally in minutes.
Bump charging, wiping battery stats, wiping dalvik cache, killing all tasks are not helping at all. I don't have SetCPU, but someone in the forum mentioned they have SetCPU, and it is not helping either.
Is anyone having this problem? Does anyone have any idea on how to solve this?
Please help.
Thank you!!!
Click to expand...
Click to collapse
I spoke to RMK as well as others about this in IRC, doesn't look like anything we can do, deep in the HTC code I guess.
I have the same issue using SkyRaider 3.1. Battery is 100% then after 5-10 minutes drops down to low 90s. It bothered me at first but after several days of moderate to heavy use and still having almost 50% battery left at the end of the day, I just figured it was some kind of bug when reading the battery level at the beginning. How is your battery life overall? If it's like mine, then i wouldn't worry too much about it as long as it's lasting longer. I'm using the 1750mAh battery from Sedio.
I was having the exact same problems until I went back to stock everything and bump charged. Took the OTA for 2.2, rooted, custom recovery, bump charged, wiped stats and cache and now I'm good to go. I usually dont think crap like this works but it made a huge difference in battery life and stopped the 100-90% problems I was having.
KB
I found this on EVO forum, but I don't know how his solution works. I personally don't think this would be the solution.
http://ip208-100-42-21.static.xda-developers.com/showthread.php?t=704272
I am using the 1500 mAh battery.
My battery life is uptime around 24 hours and awake time around 6-9 hours depending on usage.
so you're not having the issue anymore, after going back to stock (non rooted) with the official OTA 2.2?
KB Smoka said:
I was having the exact same problems until I went back to stock everything and bump charged. Took the OTA for 2.2, rooted, custom recovery, bump charged, wiped stats and cache and now I'm good to go. I usually dont think crap like this works but it made a huge difference in battery life and stopped the 100-90% problems I was having.
KB
Click to expand...
Click to collapse
KB Smoka, so you don't have this problem anymore?
Do you think format the phone and wipe all the data will help?
Have anyone tried formating the phone?
I've searched and found that the cause is the phone saying the battery is charged fully when its not basically so to fix this after it goes to 100% while the phone is one then u should turn it off and let it charge fully from there
Sent from my ADR6300 using XDA App
superchilpil said:
I've searched and found that the cause is the phone saying the battery is charged fully when its not basically so to fix this after it goes to 100% while the phone is one then u should turn it off and let it charge fully from there
Sent from my ADR6300 using XDA App
Click to expand...
Click to collapse
I did bump charge this phone, but it still drops like crazy.
I'll try this out tonight.
Thanks!
Is this a once time fix thing or do you have to do it every time you charge?
bump charging 4 or 5 times in a row (basically bump as many times as you need to to get it to where the light turns green withing a minute of 2 or plugging it in again) and then wiping battery stats solved this for me... kinda.. i still have to bump twice, but after that it'll stay at 100 for a good while and work it's way down normally, no jumping 10% down..
superchilpil said:
I've searched and found that the cause is the phone saying the battery is charged fully when its not basically so to fix this after it goes to 100% while the phone is one then u should turn it off and let it charge fully from there
Sent from my ADR6300 using XDA App
Click to expand...
Click to collapse
That is bump charging. Something htc is unable or unwilling to fix.
The issue has been known for a while and you have to 'bump charge' every time to avoid the 5-10% drop.
Here's their response about fixing the "bump charge".
"Dear **********,
I understand you would like to know if an update has be released to help get a full charge on your battery without having to bump charge it. At this time we have no information about any updates being released to help resolve this issue on your device. If an update is released for your device you will receive a notification on your device that an update is available.
To send a reply to this message or let me know I have successfully answered your question log in to our ContactUs site using your email address and your ticket number ************.
Sincerely,
Victor
HTC"
melophat said:
bump charging 4 or 5 times in a row (basically bump as many times as you need to to get it to where the light turns green withing a minute of 2 or plugging it in again) and then wiping battery stats solved this for me... kinda.. i still have to bump twice, but after that it'll stay at 100 for a good while and work it's way down normally, no jumping 10% down..
Click to expand...
Click to collapse
Do you bump charge every single time you charge right now? It's pain in the butt if I have to bump charge everyday.
Yup every day. 4 or 5 times is way overkill though. Just charge phone until green, turn off (don't need to unplug), wait until it turns green then do the plug/unplug one more time.
ufvj217 said:
so you're not having the issue anymore, after going back to stock (non rooted) with the official OTA 2.2?
Click to expand...
Click to collapse
Went to stock (official OTA), rooted, custom recovery, bump charged, reset stats and cache and I'm good now.
I charged it to "full" while it was powered on. Once the light turned green I turned the phone off, charged again until the light turned green. Took about 25 minutes. Powered up in recovery wiped battery and cache and now I'm good. The key is after doing all this you have to let the phone completely die.
If you're wiping your battery stats after a bump charge, you will have this problem every time you don't bump charge.
If you wipe your battery stats after it goes green without a bump charge, you won't have this problem.
This is because the software thinks the bump charged battery levels equal 100% charge. A bump charge adds approximately 10 percent of charge.
Formatting your phone or any software changes won't actually do anything other than wipe your battery stats while your phone is not at bump charge levels.
vantagejuan said:
If you're wiping your battery stats after a bump charge, you will have this problem every time you don't bump charge.
If you wipe your battery stats after it goes green without a bump charge, you won't have this problem.
This is because the software thinks the bump charged battery levels equal 100% charge. A bump charge adds approximately 10 percent of charge.
Formatting your phone or any software changes won't actually do anything other than wipe your battery stats while your phone is not at bump charge levels.
Click to expand...
Click to collapse
I'll try this instead! I don't want to bump charge everyday! It's too troublesome.
chillmeow said:
Hi all,
I am puzzled by my problem. I am using Virtuous 2.7 + King's BFS kernel #4.
My phone battery will drop quickly from 100% to 92% right after unplugged from the power cord. By quickly, I meant I did not use the phone, killed all tasks, and battery will drop to 92% literally in minutes.
Bump charging, wiping battery stats, wiping dalvik cache, killing all tasks are not helping at all. I don't have SetCPU, but someone in the forum mentioned they have SetCPU, and it is not helping either.
Is anyone having this problem? Does anyone have any idea on how to solve this?
Please help.
Thank you!!!
Click to expand...
Click to collapse
The reason this happens is because the battery gets charged fully to 100%, and then is allowed to slowly drain back to 90% (or so) before it's charged back to 100% again. This is how Lithium batteries are charged.
Try this: charge the battery to 100%, and immediately disconnect it after it's full. Notice how the battery doesn't drop to the low 90's immediately.
The reason "bump charging" appears to work is because there is no drain on the battery, since the phone is off. It goes to 100% and stops.
There's nothing we can do code-wise to fix this; it's just how the battery technology works. Keeping it fully charged at 100% while on would damage the charging capacity of our phones.
Btw.. wrong forum.
Solutions in search of a problem
Let me preface this by saying that I’m not an electrical engineer, or any sort of expert on phone hardware, but I think a couple issues are being confused. I’ve seen many posts about this battery “problem” here and elsewhere and an important point is being missed. People are confusing what the battery is actually doing with what the phone SAYS the battery is doing. They are NOT the same thing. The battery is a physical device and it will do what it’s going to do.
Battery life is a function of battery quality, initial state of charge, and demand. If you want the battery to last longer, look at ways of reducing demand. What applications are in use? How long is the screen on? What brightness level? Overclocking and undervolting settings? All these will affect ACTUAL battery life.
At lot of the “solutions” discussed have nothing to do with conserving energy use, but have everything to do with messing with how the phone REPORTS the state of charge. A good example is the issue of the initial drop reported by many users during the first few minutes after unplugging the charger. I see this on my own phone. If the phone is “taught” that 100% charge is when it is totally crammed with juice and plugged in as well, it’s not surprising that there is a good bit of voltage drop (+/- 10%?) right after unplugging. Does this mean there is a problem? NO! It’s just the battery doing what batteries do. A lot of the suggestions about wiping battery stats and such have nothing to do with saving energy. They are ways of fiddling with how the phone REPORTS its condition under various circumstances.
My advice: if you are happy with how your battery lasts, over the course of a day or so, then learn to relax, crack open a cold brew, and revel in just what a great phone the Incredible is. If your battery isn’t lasting as long as you need it to, then look at ways to save power or get a larger capacity battery. Tweaking the battery meter function is simply a feel-good exercise and won’t get you any actual improved performance. END OF RANT.
I can confirm that my gf's phone and my good buddies phone(both were never rooted) have never had a problem with the phone charging up slow first off(both phones charge about 1% per minute). And since they accepted the OTA, have not had the problem of charging to 100% and quickly jumping down to 90%. For instance, the other day my buddy charged his phone while on to 100%, played a game for about 2 minutes and closed it, battery was at 99%. Now I have tried and continually try every possible solution to my battery dying quick and charging slow, but am realizing that this must just be the cost of customizing my phone to my liking. And at least for the moment, a stock 2.2 DINC is just not an option for me.
larsrya8 said:
The reason this happens is because the battery gets charged fully to 100%, and then is allowed to slowly drain back to 90% (or so) before it's charged back to 100% again. This is how Lithium batteries are charged.
Try this: charge the battery to 100%, and immediately disconnect it after it's full. Notice how the battery doesn't drop to the low 90's immediately.
The reason "bump charging" appears to work is because there is no drain on the battery, since the phone is off. It goes to 100% and stops.
There's nothing we can do code-wise to fix this; it's just how the battery technology works. Keeping it fully charged at 100% while on would damage the charging capacity of our phones.
Btw.. wrong forum.
Click to expand...
Click to collapse
Sorry that I posted in the wrong forum. I thought this is related to the kernel or ROM I am using (Which is development right????).
Not to question your knowledge about the "battery technology", but why is it only happening to certain people? Nowadays most device are using Li-ion battery, why this phenomenon do not occur to all devices?
Hello to all people.
I read all guides in this forum about battery calibration but nothing same to be correct for me!
I have leeDroid 2.2e ROM Oc up 1156mhz and smarttass governator.
The problem is that my battery drain too fast!after a complete night charge I turn on my phone and after 5minutes my battery goes down to 99 98 97 until 89 in an hour!the very strange problem is that I can see 100% only for very few minutes.
I have downloaded from market battery booster and I have noticed that if my voltage is 4192mv under charge with green led, when I unplug the phone from charge the battery drains less quickly.also i have noticed that after a night of charge my led is green and when I turn on it after one minute if I plug to ac my led remains orange for a lot of time!!!!that is very strange!!!
Can anyone help me?
sent from the future
I saw another post in a German forum to this topic and I made it like this, 'cause my Battery went directly to 89% after plugging off the cable: Load your battery with the phone turned on until the green LED light is on. Then plug it off, turn the phone off, plug it in and let the battery load until the LED is green again. Then plug it off, turn the phone on and let it boot completely. After that, turn it off again, plug the cable in and let the battery load until the LED is green. Then plug the cable off, turn your phone on and use it. The problem shouldn't be there anymore. But you should do this everytime you flash a new Rom!
Ok thanks man!but I don't see in any steep how to restore the battery stats via recovery
sent from the future
I believe the reason for the battery going straight to 89% is because when the battery is at 100% and its still on charge, every now and then, the phone discharges itself down to 90% and then back up to 100%. This is because trickle charging is generally considered bad. If you dont believe me, download Juice Plotter from the market. charge your phone up to 100% and leave it on charge overnight. When you check juice plotter in the morning you will see that every so often it drops to 90% and back up to 100%. Chances are that somepeople are taking thier phone off charge when the phone is in the middle of one of these dips. I know i do it all the time.
mattiadj said:
Ok thanks man!but I don't see in any steep how to restore the battery stats via recovery
sent from the future
Click to expand...
Click to collapse
You don't restore battery stats from recovery. You wipe battery stats!
alex101uk said:
every now and then, the phone discharges itself down to 90% and then back up to 100%.
Click to expand...
Click to collapse
Thanks for that info, I had been wondering about that myself.
StuMcBill said:
You don't restore battery stats from recovery. You wipe battery stats!
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Click to collapse
Yes it is what i want mean, sorry for mistake...so i don't need to wipe battery stats?
You don't have to but you can. In AmonRA go to "Wipe" and choose "Wipe Battery Stats". In Clockwork it is in Advanced, I think...Or in the Section where you can mount the drives...The Tip that I wrote is the Battery Calibration how you can find it on HTC's Homepage. If your Desire is rooted, you can just wipe the stats if you want to.
Moved to Q&A as not development.
I've seen other threads, but I didn't like the answers. If I am going to load CM6.1 RC1 tonight, when should I wipe battery stats?
Great question. Was going to post this today as well. Since I got the extended battery yesterday from sprint.. so anyways I drained treatment battery instead of charging fully.. then I charged fully and did treatment HTC battery tweak.. then I wipe battery stats and turned on.. now will it fully charge my extended battery since I deleted stats and its been fully charge (I hope so.. 11 hours at 45%) and I drain it till its dead..?
Sent from my PC36100 using XDA App
I wiped at full charge. Let it drain all the way until phone shuts down. Recharge fully (do not unplug).
I'm at 35% on 18h and 36m.
Sent from my PC36100 using XDA App
You'll know when you need to wipe battery stats because you'll see some wild sht. For example: if your battery is at 55% and you need to flash something. You go into recovery, flash it, reboot and your battery is now at 87%, you need to wipe. Its best to wipe when you flash a new rom or kernel; just to keep everything fresh.
ms79723 said:
You'll know when you need to wipe battery stats because you'll see some wild sht. For example: if your battery is at 55% and you need to flash something. You go into recovery, flash it, reboot and your battery is now at 87%, you need to wipe. Its best to wipe when you flash a new rom or kernel; just to keep everything fresh.
Click to expand...
Click to collapse
Follow this tip here, you may not need to do it every time.....but i recommend doing it maybe once every three times you flash a rom out. And if you restore, i would just wipe batt. stats at the same time of wipe data/factory reset.
Should have clean battery label. But like another post said, to extended battery life....you may want to follow his tip too.
The only issue I have is, when you reset battery stats you have to boot into recovery, right? When booting into recovery it uses some battery, so it won't be fully charged anymore. Am I incorrect in this thinking?
Its less battery power then you think, its not like a whole boot cycle off then off a few minutes later, so it will be fine.
Sent from my PC36100 using XDA App
Hey what's up. I got this G2 with the latest cm7, which is build number 21 and the battery life is horrible. Like 8 hours with an hour of the display being on. I'm coming from the Epic which had pretty good battery life once calibrated.
So what's the proper way of calibrating the G2? I am using the stock kernel that comes with the Cm7 rom right now but I did try the pershoot kernel couple times and underclocked it but it still didn't help. I think all that kernel flashing messed up my battery life. So any ideas? Thanks!
Sent from my HTC Vision using Tapatalk
saywhat4118 said:
Hey what's up. I got this G2 with the latest cm7, which is build number 21 and the battery life is horrible. Like 8 hours with an hour of the display being on. I'm coming from the Epic which had pretty good battery life once calibrated.
So what's the proper way of calibrating the G2? I am using the stock kernel that comes with the Cm7 rom right now but I did try the pershoot kernel couple times and underclocked it but it still didn't help. I think all that kernel flashing messed up my battery life. So any ideas? Thanks!
Sent from my HTC Vision using Tapatalk
Click to expand...
Click to collapse
Charge your phone all the way to 100% (not just until the LED turns green, which is around 90%), unplug and boot into recovery, wipe battery stats, boot back into Android and use your phone until the battery drains and your phone shuts off. Keep trying to power up until it won't any more.
Now, plug your phone in (into the wall, not a computer) and charge until full *without* turning it on. Remember, the LED turns green around 90% so you'll need to leave it another few hours after the LED changes. Once you're full, unplug and boot into Android and again use it until the battery is fully drained and you can't power up anymore and you're good to go.
Remember, after wiping stats, during the draining process *do not* plug it in to the charger or your computer as thiss will mess up the calibration.
Its a pain, and takes a day or so, but its worth it. To speed up the draining process, do some process intensive things (video watching, game playing, etc.)
Sent from my T-Mobile G2 using XDA App
OriginalGabriel said:
Charge your phone all the way to 100% (not just until the LED turns green, which is around 90%), unplug and boot into recovery, wipe battery stats, boot back into Android and use your phone until the battery drains and your phone shuts off. Keep trying to power up until it won't any more.
Now, plug your phone in (into the wall, not a computer) and charge until full *without* turning it on. Remember, the LED turns green around 90% so you'll need to leave it another few hours after the LED changes. Once you're full, unplug and boot into Android and again use it until the battery is fully drained and you can't power up anymore and you're good to go.
Remember, after wiping stats, during the draining process *do not* plug it in to the charger or your computer as thiss will mess up the calibration.
Its a pain, and takes a day or so, but its worth it. To speed up the draining process, do some process intensive things (video watching, game playing, etc.)
Sent from my T-Mobile G2 using XDA App
Click to expand...
Click to collapse
Thanks for the tip. Now I have been doing some reading and saw some people recommended charging the phone while it is on when it is fully discharged the first time. You recommend while its off? Does it make a huge difference?
saywhat4118 said:
Thanks for the tip. Now I have been doing some reading and saw some people recommended charging the phone while it is on when it is fully discharged the first time. You recommend while its off? Does it make a huge difference?
Click to expand...
Click to collapse
I don't think it would make that big of a difference; if you think about it though, you're dealing with the battery and battery only if the system is turned off.
Sent from my T-Mobile G2 using XDA App
True we are dealing with the battery but when we wipe the battery stats I think it only wipes the battery information the phone had in its system. So if we wiped the stats when it is full then let it discharge till completely empty, im assuming, you would have to charge it while its on so the phone can now learn what the battery level is and when its full and its capacity. I'm just guessing I could be wrong though. I'm just going to try both and see what happens.
Sent from my HTC Vision using Tapatalk
OriginalGabriel said:
Charge your phone all the way to 100% (not just until the LED turns green, which is around 90%), unplug and boot into recovery, wipe battery stats, boot back into Android and use your phone until the battery drains and your phone shuts off. Keep trying to power up until it won't any more.
Now, plug your phone in (into the wall, not a computer) and charge until full *without* turning it on. Remember, the LED turns green around 90% so you'll need to leave it another few hours after the LED changes. Once you're full, unplug and boot into Android and again use it until the battery is fully drained and you can't power up anymore and you're good to go.
Remember, after wiping stats, during the draining process *do not* plug it in to the charger or your computer as thiss will mess up the calibration.
Its a pain, and takes a day or so, but its worth it. To speed up the draining process, do some process intensive things (video watching, game playing, etc.)
Sent from my T-Mobile G2 using XDA App
Click to expand...
Click to collapse
I have used this method to calibrate the battery and can say that it does have a pretty big impact on battery life. +/- 20% in my case. I also find that I need to re-calibrate roughly once every month or so.
To be clear, there is not such thing as "calibrating the battery", you are calibrating the battery meter (volt meter) on the phone. Maybe its just a semantic distinction, and that is what the OP and subsequent replies are talking about. But many people get this confused, due to the old process of "conditioning" NiCad batteries, which is not applicable to modern cell phone (Li ion) batteries.
In my understanging, you aren't going to increase battery life by doing any of the above, but only making the battery meter more correctly read how much power is left. For instance, if the meter is not properly calibrated, it may read lower than it should. So people think they are increasing their battery life.
I would discourage from discharging the battery to empty. Over discharge of Li ion batteries can possibly (not often, but in a small percentage of cases) prevent the battery from taking a charge. There is a safety circuit which is supposed to prevent over discharge, but it does not always work. Therefore, Li ion batteries should not be discharged lower then 20% whenever possible. Most of us do it from time to time on accident, but there is not reason to do it intentionally. Charge the battery to 100%, drain to 20%, and repeat a couple times. This will get your battery meter plenty accurate. Draining it to empty does not really gain you anything (the battery meter is not that accurate in the best of circumstances, anyway), and can harm the battery.
http://batteryuniversity.com/learn/article/do_and_dont_battery_table
Flashing a new ROM resets the battery meter. So until its properly calibrated, it will give you junk readings. This is one reason why people often jump the gun and think that a custom ROM is getting them poor battery life. Calibrate the meter, and use the ROM for a couple days, then you should get a real indication of what the battery life is like on that ROM.
redpoint73 said:
I would discourage from discharging the battery to empty. Over discharge of Li ion batteries can possibly (not often, but in a small percentage of cases) prevent the battery from taking a charge. There is a safety circuit which is supposed to prevent over discharge, but it does not always work. Therefore, Li ion batteries should not be discharged lower then 20% whenever possible. Most of us do it from time to time on accident, but there is not reason to do it intentionally. Charge the battery to 100%, drain to 20%, and repeat a couple times. This will get your battery meter plenty accurate. Draining it to empty does not really gain you anything (the battery meter is not that accurate in the best of circumstances, anyway), and can harm the battery.
Click to expand...
Click to collapse
I was about to post this. Letting a LiIon discharge all the way is more harmful to the battery than recharging it mid drain cycle.
I'm having a bit of battery issues, I haven't flashed a ROM or calibrated my battery meter. So I charge my phone to full while still on, unplug it and drain it until it turns off (NOT until the battery is completely drained, which could potentially damage the battery), plug it up and let it charge while off, and I should be calibrated?
Do you need to have root to be able to reset battery stats?
Sent from my T-Mobile G2 using XDA App
Hello I have a question about how I can reset my battery. I just flashed a new rom and my battery was around 70 ish percent, so I made another backup file of my new rom. After I completed the backup and renooted my phone the battery life showed itsef at 100% ans sees to die really fast. Is there anyway to return it to normal?
Sent from my PC36100 using XDA App
cheeeya said:
Hello I have a question about how I can reset my battery. I just flashed a new rom and my battery was around 70 ish percent, so I made another backup file of my new rom. After I completed the backup and renooted my phone the battery life showed itsef at 100% ans sees to die really fast. Is there anyway to return it to normal?
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
Charge to phone to 100%, boot into recovery, wipe battery stats, reboot into the phone. Use the phone til it completely dies, i.e. manually power off, then charge it back to 100%. If you undervolting or using other mods and your charging led blinks, its okay, it'll do that for a minute and turn solid. Again, charge it to 100% and you'll be good.
Only wipe battery stats when u are at 100% charge.
Sent From My Pocket