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.
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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'.
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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
OK so here is the deal.
I did the battery calibration of charging to 100 and then wipe the battery stats and then fully deplete. The following day I wanted to drain it even further down so after the phone hit zero and shut down. I then plugged it into a usb just long enough to get into recovery and then immediately unplugged it from the usb (10-15 seconds.) I just left it sitting there in recovery for AN HOUR before it shut off on it's own. I am wondering why there is that much power still left in the batteries and yet the phone still shuts down? Is there a reason the phone needs to keep that much of a reserve?
Thanks!
atomb said:
OK so here is the deal.
I did the battery calibration of charging to 100 and then wipe the battery stats and then fully deplete. The following day I wanted to drain it even further down so after the phone hit zero and shut down. I then plugged it into a usb just long enough to get into recovery and then immediately unplugged it from the usb (10-15 seconds.) I just left it sitting there in recovery for AN HOUR before it shut off on it's own. I am wondering why there is that much power still left in the batteries and yet the phone still shuts down? Is there a reason the phone needs to keep that much of a reserve?
Thanks!
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Click to collapse
Well, draining a modern lithium ion battery completely is detrimental to it's lifespan, so... yes, there is a reason for the reserve.
My wife has my old S2 and the past day has noticed it only charges to 52%.. She tends to play on the phone doing miscellaneous stuff thru the day and when it gets low just plugs the charger in and continues to play.. I know on my S3 everynight I allow it to get down to about 2% then will plug it on until it reaches full charge 100%.. Should I allow hers to fully discharge til the phone shuts off and let it get a full charge cycle the next couple days iin hopes of "re-training" the battery cycles or is there something else I should do.
Sent from my SGH-T999 using xda app-developers app
Lithium battery's don't have a "memory" like nickel cadmium batteries. They would die quick doing what your describing over time. Lithium doesn't work that way.
In other words, I wouldn't worry about it.
Sent from my SGH-T989 using xda app-developers app
HoustonsBirdman said:
My wife has my old S2 and the past day has noticed it only charges to 52%.. She tends to play on the phone doing miscellaneous stuff thru the day and when it gets low just plugs the charger in and continues to play.. I know on my S3 everynight I allow it to get down to about 2% then will plug it on until it reaches full charge 100%.. Should I allow hers to fully discharge til the phone shuts off and let it get a full charge cycle the next couple days iin hopes of "re-training" the battery cycles or is there something else I should do.
Sent from my SGH-T999 using xda app-developers app
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Click to collapse
Method 1 – The Drain Way
Drain it down until fully dead.
Charge normally to full.
Reboot to Clockwork recovery and wipe battery stats (under advanced, on second page), reboot phone.
Turn everything on, flashlight, Bluetooth, Wi-Fi, Pandora, the whole nine, to quickly drain it completely dead.
Charge normally to full.
Method 2 – The Powered Off Charge way
Charge your phone 100% while it’s on.
Unplug it from the charger, power off, then charge it up to 100% with it in a powered off state.
Unplug charger from phone. Power it on, and then charge it to 100% while the phone is on.
Unplug the charger and then reboot into Clockwork, go to advanced and clear the battery stats.
Power on, charge to full, and then enjoy.
Method 3 :
Start with the phone powered on.
(Phone on) Charge battery until the LED turns blue
(Phone on) Unplug the phone from the charger, wait until the LED turns off
Power off the phone.
(Phone off) Plug the adapter into the phone, charge it up until the LED turns blue
(Phone off) Unplug, wait until the LED turns off
Power the phone on.
Wait until the phone is booted back up all the way, and then power it off again
(Phone off) Plug the adapter into the phone, charge it up until the LED turns blue.
Boot the phone into recovery mode
Go to Advanced, and then choose Wipe Battery Stats.
Power the phone on and use normally.
You really dont have to reboot into recovery and wipe battery stats as that doesn't really work but to get all your juice back its going to be a few cycles also this works pretty good as well https://play.google.com/store/apps/details?id=com.nema.batterycalibration&hl=en
Hello is they anything I can do to fix my battery? it will just switch off at 30% or sometimes 20% and when I switch back on it will say 1%
Try this :
Power off phone.
Plug phone into HTC charger and charge for two minutes or more
While charging, hold down volume up+volume down+power button and continue holding
Phone will turn on and off repeatedly every 15 seconds or so while continuing to hold all three buttons
Keep this going for 2 minutes, then release buttons when phone is ON
Now, let phone charge fully normally (with phone either on or off--doesn't matter) and battery level reporting, charging and battery life should be normalized.
ckpv5 said:
Try this :
Power off phone.
Plug phone into HTC charger and charge for two minutes or more
While charging, hold down volume up+volume down+power button and continue holding
Phone will turn on and off repeatedly every 15 seconds or so while continuing to hold all three buttons
Keep this going for 2 minutes, then release buttons when phone is ON
Now, let phone charge fully normally (with phone either on or off--doesn't matter) and battery level reporting, charging and battery life should be normalized.
Click to expand...
Click to collapse
Thanks will give that a try.
Hello, I have a serious battery problem on the HTC one m8. Whenever I boot into hboot or recovery and reboot back to the OS, the battery insanely goes down or goes up. I have examples of it happening.
Hboot to OS: 20 to 86%
OS to recovery: 79% to 5%
OS to recovery (again): 100% to 14%
Hboot to OS: 13% to 90%
Today I was on 91% when the phone suddenly went to 0% and turned off. When I plugged it in to charge the percentage showed 27%.
Can this be fixed or do I have a bad battery and need a replacement? I'm on a Rooted and Bootloader unlocked T mobile m8, on mokee 6.0.1.
Seems like a bad battery indeed, but first, try battery calibration:
"Plug phone into HTC charger and charge for two minutes or more
While charging, hold down volume up+volume down+power button and continue holding
Phone will turn on and off repeatedly every 15 seconds or so while continuing to hold all three buttons
Keep this going for 2 minutes, then release buttons when phone is ON
Now, let phone charge fully normally (with phone either on or off--doesn't matter) and battery level reporting, charging and battery life should be normalized."
See if this helps.
Will do this and let you know.
Looks like he didnt let us know...