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Does anyone have a link for the thread that discussed the correct way to wipe battery stats when upgrading to a new Rom? I remember it went something like drain dead, charge to full, drain dead again then charge to full and wipe stats. I can't remember the complete process. Thanks for the help.
Sent from my PC36100 using XDA App
I've seen a couple different threads on that here, one saying discharge fully then charge while powered off, and the other saying to do a full charge "conditioning cycle". I did the latter and it seems to have made a difference.
Here's what I did:
Charge the phone fully with it powered on
When fully charged, disconnect cable
After green LED goes off, power the phone off
When phone is fully powered off, reconnect cable, amber charging light should be on
When LED goes green, disconnect cable
Repeat previous two steps 10 times
After 10th cycle, boot into recovery and wipe battery stats.
I am using Amon Ra recovery which has the wipe battery stats option under the Wipe option. I never did this when I had Clockwork recovery installed, so I don't know if the option is in the same place.
Being an electrical engineer, I find this business of battery conditioning interesting, along with the Ni-Cd "memory" vs. Li-Ion "no memory" issue. If anyone has found a decent physics-based explanation as to why these things do or do not have any basis in fact, I'd appreciate a link. Yes, I'm too lazy to Google it at the moment.
Hmm, I may have to look into this again. I charged my phone all night (powered off) and unplugged it this morning. I did nothing with it this morning but turn it on and look at it, then put it in standby (quick press of power button). It lost 16% of charge in less than 2 hours!
I'm running BS1.2 with the Baked1 (low voltage/best battery) kernel.
Damn, just installed System Panel and found that my CPU is at 100% constantly!
I'm trying this now. The longest I've pushed my battery was 22 hours... and that was with 39 minutes of screen on time, lol. In standby almost the entire 22 hours....
Ok, I believe my issue was related to a camcorder problem, my CPU usage has dropped back to normal levels after fixing that separate problem. After my battery recharges fully I will see what happens with the charge.
the other methods to do "calibrate your battery" (which isnt really calibrating the battery but the battery stats of the phone so it can accuratly judge when it stops and starts charging)
1) charge the phone to full
2) unplug and use phone till it shuts off from no battery (do not plug in until it shuts off)
3) charge phone to full again with out unplugging till 100% (check under about phone > battery it shoudl say full charge there)
this should reset the battery stats.
the last method is one from HTC
1)Charge the phone for 8 hours uninterupted with power on
2) turn off the phone and charge for an additional hour
3) turn ont he phone unplug it and let it sit for 2 minutes then plug it in for an additional hour.
all 3 methods listed should help. I personally dont like the x10 method because it has the potential and basically over charges the battery to make sure it is acctually at a full charge. It is much faster then the other 2 methods though so to each there own.
Dont waste your time on...
plug/unplug 10 times. It really doesn't recal the battery.
the unplug/plug 10 times.
1. Phone on...charge until green light comes on. Immediately unplug and turn phone off.
2. Plug phone back in until green light comes on again. Immediately boot into Recovery and wipe battery stats.
3. Use the phone on battery until dies.
4. recharge phone to 100%
You are good to go!
If I tether during the day (5+ hours) a lot, is it bad on my battery? Isn't that like a constant charge or does once the LED turn green it stops trying to charge?
Thanks.
fldash said:
If I tether during the day (5+ hours) a lot, is it bad on my battery? Isn't that like a constant charge or does once the LED turn green it stops trying to charge?
Thanks.
Click to expand...
Click to collapse
the evo doesnt do a trickle charge so when the light turns green it stops, this is why you will almost always drop 1-5% battery rather quickly.
Are you sure? My light has been green for a while, and my phone battery status says 'Full'.
fldash said:
Are you sure? My light has been green for a while, and my phone battery status says 'Full'.
Click to expand...
Click to collapse
There's a lot of confusion over how the battery / charging circuit works and how it reports. My advice is to just charge until it's green and full, then unplug it. If you leave it plugged in all night, unplug it for 10 mins in the morning, then plug it back in to top off.
That doesn't really help me SilverZero, my question is only if leaving it tethered (which means connected to USB) is bad for my battery.
Well on mine i would check it every once in awhile and i would see that once it get downs to under 90% that it would charge again till it recognized that it was full again. So based on that i dont think you should have to worry about it. It seems to only draw the charge when needed. I also leave mine plugged in alot when im home so its good to go when i leave and havent noticed a loss of battery life at all.
You guys don't want the charger to trickle charge. Li-Ion does not accept overcharge, even 0.01C (15 mA on the stock Evo battery) will cause it to vent and probably combust.
So does "calibrating the battery" calibrate the phone or the actual battery?
I ask because I have 3 spare batteries, wondering if I have to do this for each of them??? They are all standard size, one of them OEM
I noticed something about the battery meter.
If you power on your phone when the charger is plugged in, the battery meter shows a higher value.
If you power on your phone when no charger is connected, the battery meter shows a lower value.
And these values stay for as long as your phone is not rebooted. My guess is, the value without charger plugged in (lower value) is more accurate.
So, if you want to make your battery meter more accurate, try this:
- Disconnect your phone from the charger
- Power off the phone
- Power on the phone again (phone must be disconnected from charger)
- After phone has booted into Android, plug the phone into USB/charger to charge it again
If you could try this out and see if the observation is always true, then maybe we should make this procedure standard to get a more accurate battery meter reading.
So this may have caused the fact that my phone keeps telling me, while charging, the battery is fully charged however it says 95% as soons as its unplugged
Power off the phone and connect charger while it's off, wait for the 100% sign on the fully green battery, then unplug the cord and connect it again, you can do this a couple of times. And resetting the battery stats should also help in some way.
opica said:
Power off the phone and connect charger while it's off, wait for the 100% sign on the fully green battery, then unplug the cord and connect it again, you can do this a couple of times. And resetting the battery stats should also help in some way.
Click to expand...
Click to collapse
What I'm suggesting is a bit different.
Power off phone.
Power on phone again, without plugging anything in.
After phone has booted, plug in charger.
EDIT: I notice this difference in battery meter reading tends to happen only with the *real* charger, and not when connect to a USB port on a PC.
That is right hardcore. This also refers to post-flashing boot.
I always disconnect device as soon as flashing procedure completes.
hardcore said:
I noticed something about the battery meter.
If you power on your phone when the USB charger/cable is plugged in, the battery meter shows a higher value.
If you power on your phone when no USB charger/cable is connected, the battery meter shows a lower value.
And these values stay for as long as your phone is not rebooted. My guess is, the value without USB plugged in (lower value) is more accurate.
Click to expand...
Click to collapse
Hey,
Heres whats happening:
Lithium-ion batteries dont like it when you charge them while full. It wears them down. So to preserve batterylife it charges untill full, then stops charging completely. When it droppes down to far, it'll charge again for a bit. The phone will show full, in reality it'll be a little less. When you unplug it will drop down quickly to a more precise value. Bump-charging (disconnect, reconnect charger) works, however you are wearing the batterylife down. Could be you dont care, so it'll be youre own choice.
Older phones do not do this. They charge till full, then trickle power continuesly so it'll always be full when disconnected.
Hope this helps.
weirder said:
Hey,
Heres whats happening:
Lithium-ion batteries dont like it when you charge them while full. It wears them down. So to preserve batterylife it charges untill full, then stops charging completely. When it droppes down to far, it'll charge again for a bit. The phone will show full, in reality it'll be a little less. When you unplug it will drop down quickly to a more precise value. Bump-charging (disconnect, reconnect charger) works, however you are wearing the batterylife down. Could be you dont care, so it'll be youre own choice.
Older phones do not do this. They charge till full, then trickle power continuesly so it'll always be full when disconnected.
Hope this helps.
Click to expand...
Click to collapse
I'm not talking about the usual Li-ion full-charge effects. Also it may not be true that other phones don't do this. For sure, many laptops do this - after the battery charges to 100%, they won't charge the battery until it decreases to a certain level, say 95%.
I'm referring to the difference in battery meter reading if u boot the phone while connected to the wall charger, vs booting the phone when it's disconnected from the charger.
What you say is right, I am used to power OFF my phone & charge it at night, & when I get up, switch it ON while still plugged in. I must make it a point to remove the cable before I switch ON.
I noticed this many months ago and it persists even after flashing many different firmwares. It actually comes in handy some times. For instance when my battery is running low and i need to step out i simply plug in the charger, power off then power back on. Phone instantly jumps 30% or so. But generally i tend to power on without the charger attached so as not to stuff up the battery stats.
Sent from my GT-I9000 using XDA App
Anyway this behavior is not correct.
Samsung changed recently battery drivers in JPX sources and the problem is still persistent. I suspect it might be related to wrong battery voltage measuring point (hardware design flaw? although most problems with sgs are/were software related) or result misinterpretation.
Or their Q/A team is so clueless that they didnt notice that.
hardcore said:
EDIT: I notice this difference in battery meter reading tends to happen only with the *real* charger, and not when connect to a USB port on a PC.
Click to expand...
Click to collapse
I just tested this. 5% battery. Reboot with usb plugged in. 50%battery. The battery also seems to drain really fast after the reboot.
I am plugged in using original usb cable in a usb on the front panel of my pc...
Edit: im still plugged in and it's going down... i boot with usb at 50% leave it in and while charging the battery goes down... i left it in and now it's going 49...48...47 while charging... wtf lol
Sent from my GT-I9000 using XDA App
Lightarrow said:
I just tested this. 5% battery. Reboot with usb plugged in. 50%battery. The battery also seems to drain really fast after the reboot.
I am plugged in using original usb cable in a usb on the front panel of my pc...
Edit: im still plugged in and it's going down... i boot with usb at 50% leave it in and while charging the battery goes down... i left it in and now it's going 49...48...47 while charging... wtf lol
Sent from my GT-I9000 using XDA App
Click to expand...
Click to collapse
My guess is this is because the actual level of the battery is 5%, and 'cause it's plugged in it's saying 50% for some strange reason. So really you're charging from 5% up to 50% (and eventually more, but that aside), and I think the phone is averaging between your actual battery level and the 50% every time you go up 1%? Just my guess.
johanaikema said:
My guess is this is because the actual level of the battery is 5%, and cause it's plugged in it's saying 50% for some strange reason. So really you're charging from 5% up to 50% (and eventually more, but that aside), and I think the phone is averaging between you're actual battery level and the 50% every time you go up 1%? Just my guess.
Click to expand...
Click to collapse
Yeay that is what im thinking too weird stuff.
@hardcore : just tried your suggestion. I shut down with the cable plugged in. Remove it. Reboot. But my battery is still at 47... ill try to go into cwm to see if that triggers something. Or maybe remove the battery and insert it again...
Sent from my GT-I9000 using XDA App
Ok. I tried this : removed my battery, waited 5 seconds, reput my battery, reboot all with charger unplugged. Battery went from 47 to 52. So this had no effect.
Then i shut down the phone, used 3br to get into recovery (cwm) did nothing except select reboot phone now and the phone rebooted, now 12% battery.
Btw using all tweaks in your kernel except tun.
Weird stuff...
Sent from my GT-I9000 using XDA App
noticed this months back too but didnt think much about it.
i just figured the software is reading the higher voltage during charge and reporting it wrong during boot.
*could be wrong
EDIT: and the diff is quite big, increase of 20-30%
hardcore said:
What I'm suggesting is a bit different.
Power off phone.
Power on phone again, without plugging anything in.
After phone has booted, plug in charger.
EDIT: I notice this difference in battery meter reading tends to happen only with the *real* charger, and not when connect to a USB port on a PC.
Click to expand...
Click to collapse
what @weirder post is the true fact about the lithium ion charge process. your charging method is called bump charging. but that way of charging the juice wear off the battery life sooner than normal charging..
I've been checking out the battery meter source code, and I think the battery level is calculated *only* from the battery voltage. Which is quite inaccurate, compared to laptop batteries which keep track of the charge, etc.
hardcore said:
I've been checking out the battery meter source code, and I think the battery level is calculated *only* from the battery voltage. Which is quite inaccurate, compared to laptop batteries which keep track of the charge, etc.
Click to expand...
Click to collapse
This could be improved by using its temperature. Since the SoC is a function of temperature, charge history, and current evolution over the time.
[[]]
I tried the bump charging till the meter says 100% and right after unplugging from the charger the meter reads 98%. I let the battery drain up to 96% and connected my phone into a usb port of my PC and when the meter say its 100% charged, i disconnected the phone from the usb port and wallah...it stays at 100% charged and it has been at 100% even after 15 minutes...
I really don't recommend bump charging. You risk damaging your battery by overcharging. Or worse, making it blow up due to overcharging! I know it sounds paranoid but you never know...
So I've noticed for a while now that when I disconnect my dInc after charging, the battery will drain almost 20% within the first couple hours (almost no use at all). I suspect that the battery isn't being fully charged when the green light first goes off. After I plug/unplug the cable and charge a couple more times, it holds a higher charge more consistently. I've read this is due to the phone not wanting to over-charge the battery, however in the case of my battery (Seido 1750), it doesn't even fully charge.
Is there any way (aside from the plug/unplug scenario) to fully charge the battery in one go? An app maybe?
My phone is rooted.
Thanks.
The battery could be losing its ability to hit its capacity. In other words its wearing down.
Nothing will fix it. There are no apps to bump charge.
Sent from my Galaxy Nexus using Tapatalk 2
Get an external charger for your battery and couple of extra batteries. I get best result not charging in the phone and rotating batteries.
Sent from a HTC Droid Incredible running CM 10.1
Charge the phone powered on until the light turns green. Leave it plugged in but turn it off. Leave it plugged in, off for about 20 minutes, you will notice the light is still orange even though its already "charged." Once the light goes green again, unplug it and power it up. When I do this, my battery will go for 3 or 4 hours before it hits 90 percent with my regular use.
el6006 said:
Charge the phone powered on until the light turns green. Leave it plugged in but turn it off. Leave it plugged in, off for about 20 minutes, you will notice the light is still orange even though its already "charged." Once the light goes green again, unplug it and power it up. When I do this, my battery will go for 3 or 4 hours before it hits 90 percent with my regular use.
Click to expand...
Click to collapse
Just be aware that bump charging as it's called, can reduce the life of your battery over time.
I've seen a few post regarding the 4.3V at 100% thing, but they're too old and haven't really given me much information.
My main issue is that I'm experiencing unusually rapid battery drops after my phone reaches 12% charge, it'd drop to 0% in just a few seconds. I downloaded a few battery calibration apps thinking that it might be a calibration issue. In that process, I noticed that the voltage read by these apps (and even in the *#*#4636#*#* menu) when fully charge is 4,38 volts. It was my understanding that Li-Po batteries should be fully charged at 4.2 volts and that charging past that point is harmful for the battery.
I also noticed that if at this point (charged at 4.38 volts - 100%) I unplugg the charger, the battery indicator would show 100% for a while, until the voltage drops below 4.2V, at that point the porcentage would change to 99%, so it seems that the device is set recognize 4,2V as fully charge, but it continues charging after that point. Also, the green light turns on at 90%, is this normal?
I tried calibrating using this app but with no results. I'm trying the manual calibration now. What is going on here? Could this be a clibration issue or do I have a faulty battery?
I think it is not normal. My P6 drops even a little bit slower from 10%. current my P6 is on 6% and 3,627V. (Edit: Turn off: 3,55V / After charge 100%: 4,32V)
Next time i will charge, then i post the Voltage at 100% for you.
To calibrate the accu you don't need any app. Use P6 until it is automatic power off. Now turn it on so often until it will not start anymore, and only show a red accu on screen. Now charge to 100%, turn on, unplug charger. Now your accu is calibrated.
heross said:
I think it is not normal. My P6 drops even a little bit slower from 10%. current my P6 is on 6% and 3,627V. (Edit: Turn off: 3,55V / After charge 100%: 4,32V)
Next time i will charge, then i post the Voltage at 100% for you.
To calibrate the accu you don't need any app. Use P6 until it is automatic power off. Now turn it on so often until it will not start anymore, and only show a red accu on screen. Now charge to 100%, turn on, unplug charger. Now your accu is calibrated.
Click to expand...
Click to collapse
Thanks, heross. So apparently the >4.2V @ 100% is not so unusual. Does your phone remain at 100% for a relatively long time and drops to 99 after the voltage is below 4.2V? Mine does that, and it also turns the led green when it reaches 90%.
I'm sure the dropping from 12% o 0% in seconds cannot be normal, but I'm wondering if the above is a symptom that something is wrong or
if it's normal.
EDIT: Ok, the phone just turned off by itself, the quick drop hapenned as usual (12% to 0% in less than a minute) and the voltage fluctuated between 3,1 and 3,3 volts in the process, maybe even less than 3.1 V, but I'm not sure. I took a series of screen shots 2 seconds apart, I'll post them when I turn the phone on again, I'll let it charge as you suggested.
Yes LED green at 90% is normal. My P6 drops to 99% after 1-2minutes screen on or after a boot without charger.
12% to 0% in seconds is definitely not normal. Normal it goes down very slowly to 3% then it comes a Info and after 30sec it power off.
Hi
heross said:
Yes LED green at 90% is normal. My P6 drops to 99% after 1-2minutes screen on or after a boot without charger.
12% to 0% in seconds is definitely not normal. Normal it goes down very slowly to 3% then it comes a Info and after 30sec it power off.
Click to expand...
Click to collapse
Finished charging.
I've turned the phone on and it has been sitting at 100% for about 25 minutes at 4,348V with the screen on. (I even played a video with full brightess). After that it droped to 99% and 4,079V[/B]. That can't be normal.
I saw that the P6 battery is rated 4,35 volts, so i'm not too worried anymore abut that voltage and everyone else seems to have the same values, but this quick drop with 12% and the fact that it stays for so long at 100% does worries me.
The screenshots were taken 2 or 3 seconds apart. It doesn't give me a low battery warning at 15% like most phones, but at 8%
I'm still having this extremely annoying problem. The goddamn battery goes from 12-13% to 0% in a blink of an eye. I just plugged the charger at 8% and it show 0% right after and started charging from there. Voltages are strange too, it shows ~3,6 volts when it started dropping quickly. It has charged ~20% in less than ten minutes. Look at this behavior: sudden voltage drops, never went below 3,3V and dies at 3,6V (almost nominal voltage)
I've tried calibrating several with several methods a few times, I'd prefer to stop doing that since I know it stresses the battery.
Has anyone had this issue? Can someone please shed some light on WTH is wrong with this troublesome phone?
Saw this post now. I have the same problem but it is from 9% to 0% . I don't think it is the battery, i think it is how android reads your battery info. I managed to calibrate mine by charging it when off from 0% to 100%-didn't last for long, the problem appeared once again.
It stays to much at 100% after charging, so we have the same battery life. Might be the kernel, don't know. I home when emui 3.0 is relased comes with a new kernel as well.
mcgyani said:
Saw this post now. I have the same problem but it is from 9% to 0% . I don't think it is the battery, i think it is how android reads your battery info. I managed to calibrate mine by charging it when off from 0% to 100%-didn't last for long, the problem appeared once again.
It stays to much at 100% after charging, so we have the same battery life. Might be the kernel, don't know. I home when emui 3.0 is relased comes with a new kernel as well.
Click to expand...
Click to collapse
I also managed to fix it once, I don't remember exactly what I did (I've tried so many things) but it didn't last long either, it discharged normally one time, but the next time dropped from 12% to 0% again in seconds. When will EMUI 3.0 be released?
They said emui 3.0 will be released in the middle of november for p6 but they also said that it will be available for p7 since october -they kept their word and it is available but only for the chinese versions of p7. So i would expect emui 3.0 for p6 in december for the international version.
mcgyani said:
They said emui 3.0 will be released in the middle of november for p6 but they also said that it will be available for p7 since october -they kept their word and it is available but only for the chinese versions of p7. So i would expect emui 3.0 for p6 in december for the international version.
Click to expand...
Click to collapse
Ok, I think I managed to calibrate it, I'm not sure yet, I will update once the battery is drained so I can see how it behaves at low charge, but there are indications that it's working.
If you're experiencing the same problem as me, then you've probably noticed that after your phone drops quickly from 9% (in your case) to 0% and you plug the charger, the battery will charge up to 9% also very quickly. If this happens, then Android is not reading the battery info right and you'll get a 100% reading before it's actually fully charged, and will keep on charging past that point (which I believe is why it stays at 100% for such a long time). It'll obviously drain from 9% to 0% again once it's discharged - because it's not really at 9%, it's much lower.
So, if we can manage to get Android to display normal charging speeds at low charge, then the battery should be calibrated. This is what I've managed to do.
Here's how:
1. Get a Battery Monitoring App (I use Battery Monitor Widget) and set the update intervals to 1 minute
2. Let your battery drain and your phone turn irself off until you can't turn it on
3. Plug the charger and turn the phone on. Watch how the charge increases in this process, it'll most likely charge too quickly (See graph screenshot - blue arrow: a steep slope indicates quick, abnormal charging speed readings)
4. Wait 5 minutes or until it reaches 10-12%
5. Unplug the charger and let the battery drain again. Watch how it discharges, if it charged too quickly in step 3, it'll most likely discharge quickly too here (You can see in the graph screenshot that the discharging slope in this process is also very steep)
6. When it says it's going to turn itself off in 30 seconds, plug in the charger (don't let it turn off).
7. If the 'turning off' message appeared, say, at 2%, your phone will probably display 0% after you plug the charger (i know this makes no sense, but it happens like that)
8. Let it charge and watch how it's charging.
After doing this my battery charged at a normal rate (Graph screenshot - red arrow) and it behaved normally approaching full charge (current started decreasing approaching 100% - green arrow). It didn't stay for ages in 100% after unplugging the charger either, just 1 hour in deep sleep (2nd and 3rd screenshots), which I think is fine because I used to unplugg the charger at night and wake up to a 100% battery, so it seems Android is reading battery info correctly now.
I hope this works for you too, mate (And that it will last more than one charge cycle).
I'll update tonight with low charge behaviour, but I'm pretty sure it'll discharge normally.
EDIT: It didn't actually eliminate the problem, but it got a little better, it now drops from 7% to 4% (instead of 12-13%) and stays at 4 for a while.
I charge my Nexus 5X with the official charger, and usually takes less than 2 hours to charge (not sure if 1h30m or 1h40m I don't pay attention tbh), and normally it charges this fast. Except in one situation: When the phone is turned on charging after turning itselff off reaching 0 battery (I was just doing a full charge 1 time).
In this situation, the N5X still says "charging rápidly" but it charges 1 battery every 2-3 minutes, and says "4h left to full charge". I let it charging turned on like this, and this slow charging continues on and on... and it really takes that time to charge.
However, if at any point I turn off the N5X and I let it charge for a little turned off, it charges normally (1 percent per minute or more) and after turning it back on again, it continues charging normally.
This is strange, and didn't happen with the N5.
Any of you noticed this?