Develop Bugs

Correct way to recalibrate/wipe battery stats

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

[Q] Please help! Phone shutdown at 12% battery remaining

I have tried to calibrate and wipe batt stats.
What can i possibly do?
Should a calibration have fixed this or not?

Charge phone 100%....then complete wipe; dalvik, battery, etc....reflash ROM...then another battery wipe and a reboot...should do the trick
Sent from my HTC Vision using XDA Premium App

Also when you charge the phone to 100% turn it off and charge again until light goes green.

Edwg318 said:
Charge phone 100%....then complete wipe; dalvik, battery, etc....reflash ROM...then another battery wipe and a reboot...should do the trick
Sent from my HTC Vision using XDA Premium App
Click to expand...
Click to collapse
Has anyone else tried what this user says?
Also when you charge the phone to 100% turn it off and charge again until light goes green.
Click to expand...
Click to collapse
It does not matter. When i turn it off and put in the charger it goes to green straight away!

Once you have taken it to 100% take it off the charger use it for 5 mins turn it off then put back on charge while phone is off. Or just check out the link yourself

turnerpctech said:
Once you have taken it to 100% take it off the charger use it for 5 mins turn it off then put back on charge while phone is off. Or just check out the link yourself
Click to expand...
Click to collapse
It does not mentioning using it for 5 mins?
Also i already mentioned that I HAD calibrated the battery.
Does anyone know how one can test and see if the battery has been calibrated succesfullt?

Using AOSP Gingerbread ROM? Many users reported their phone shutting down at 10+%.
I'm still on froyo an phone shuts down at 1-2%.

Yes exactly! Using Oxygen 2.0.3
Actually I haven't found posts about other users with shutoff probs around 10%!
---- edit
But actually i also had the problem before rooting and changing rom on stock desire 2.2.
But there it turned off at around 7-8%

I actually came across a lot of posts/threads with this same issue.
Anyways, you should try the following:
1. drain you battery until the phone turns off.
2. switch on phone (it should now say 0%) and drain it, till it shuts down again.
3. charge it to full while swithced off (then take out charger).
4. turn on, let it boot fully and after 5 mins put on charger till it is fully charged.
5. reboot and and in the custom recovery wipe battery stats.
Also this method is depending on the kernel.
TBH, I don't know which isthe best kernel for Oxygen, but stock should do it.
The original version:
This has been taken from the thread on XDA by vidler.
The following steps should significantly extend the battery life on your phone.
Please connect the phone to the charger with the phone powered on, and allow the phone to charge until the notification LED is green, indicating the device is fully charged.
Disconnect the phone from the charger, and power it off.
Reconnect the phone to the charger with the phone powered off, and allow the phone to charge until the notification LED is green.
Disconnect the phone from the charger and power it on. Once the phone is powered completely on, power it off again and reconnect it to the charger until the notification LED is green.
Disconnect the phone, power it on (OPTIONAL: Enter Recovery at this point and Wipe Battery Stats (from Advanced menu), and use it. You need to use this sequence only once.
Click to expand...
Click to collapse

I've had the same problem on stock unrooted 2.2. Did a full wipe, root, S-OFF and installed InsertCoinHD yesterday - same issue, hibernation at around 12%-13% battery left.

[Q] HELP!!!!!!! my HTC evo 4g wont cut on

I have a rooted htc evo 4g with cyanogen 7 on it and i was playing minecraft pocket edition demo on my phone then it froze and cut off now it wont cut on what do i do

The phone doesn't turn on at all?
Sent from my PC36100 using XDA App

nope but when i plug it up to the charger the led that indicates that its charging flashes but normally its solid so idk whats wrong

Try a battery pull
Sent From My Pocket

fatboycasey said:
nope but when i plug it up to the charger the led that indicates that its charging flashes but normally its solid so idk whats wrong
Click to expand...
Click to collapse
remove the battery for 5 minutes, then try to turn it back on.

i try'd taking out the battery but it didn't work

Try first charging the battery then leave the battery out for a while then charging out again for a little bit then turn on
Sent from my PC36100 using XDA App

Was the battery low when this happened? Sometimes when a battery dies completely, it takes some time to get the battery charged enough for the phone to boot.
If you can, try a different battery or go to a Sprint store and have them give it a boost.
Sent from my Evo + MIUI using Tapatalk!

Mine has done that before.
1. Unplug phone from charger
2. Remove battery for a few minutes
3. Insert battery and plug into charger (do not attempt to turn phone on)
4. Let phone charge for about 30 minutes or so
5. Turn phone on

The battery is undercharged.
Either take it to a Sprint store for a boost or plug it up and let it sit until the amber light goes solid.

Also better if use the wall charger rather than a car charger or charging off ur computer. I've had it happen to me and the battery is just fully drained. Pull battery insert battery plug into wall charger and wait a long time. Blinking light will turn solid amber and eventually charge fully. If not then take to sprint store

Force battery to fully charge

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.

Charging % difference when phone is off & on

I have a 32GB d855 running 6.0 V30A-ZAF-XX, I put my phone on charge while it was off, charged it until 30% then decided to turn it on, after I booted into marshmallow, suddenly it was saying it is on 57% charge. Does anyone know why and is this a bug which ruins the battery?

t2can said:
I have a 32GB d855 running 6.0 V30A-ZAF-XX, I put my phone on charge while it was off, charged it until 30% then decided to turn it on, after I booted into marshmallow, suddenly it was saying it is on 57% charge. Does anyone know why and is this a bug which ruins the battery?
Click to expand...
Click to collapse
Try calibrating using any 'battery calibration' app. I had this problem which was hence solved.
Sent from my LG-D855 using XDA-Developers mobile app

Sreerag ag said:
Try calibrating using any 'battery calibration' app. I had this problem which was hence solved.
Sent from my LG-D855 using XDA-Developers mobile app
Click to expand...
Click to collapse
Do not use any battery calibration app!!!! It can harm your battery unless it has been proven to work on the G3.
Do this instead:
1. Discharge your phone fully until it turns itself off.
2. Turn it on again and let it turn itself off.
3. Plug your phone into a charger and, without turning it on, let it charge until the on-screen or LED indicator says 100 percent.
4. Unplug your charger.
5. Turn your phone on. It's likely that the battery indicator won't say 100 percent, so plug the charger back in (leave your phone on) and continue charging until it says 100 percent on-screen as well.
6. Unplug your phone and restart it. If it doesn't say 100 percent plug the charger back in until it says 100 percent on screen.
7. Repeat this cycle until it says 100 percent (or as close as you think it's going to get) when you start it up without being plugged in.
8. Now, let your battery discharge all the way down to 0 percent and let your phone turn off again.
9. Fully charge the battery one more time without interruption and you should have reset the Android system's battery percentage.
Remember that it is not recommended to perform this process all the time. Even when your battery is so dead your phone won't even turn on, your battery still has enough reserve charge to avoid system damage. But you don't want to poke the tiger with a stick. Perform this process once every three months at the most. If it is required more often than that you have bigger problems at hand.
Put plainly: fully discharging a battery is bad for it. Trying to overload a battery is also bad for it. The good news is that charging batteries automatically shut off when their safe limit is reached and there's always a little in reserve even if your phone won't start. But again: do this only when really necessary, because it does have a negative impact on battery life.
Guide taken of androidpit.com but it is very effective...

aaronkatrini said:
Do not use any battery calibration app!!!! It can harm your battery unless it has been proven to work on the G3.
Do this instead:
1. Discharge your phone fully until it turns itself off.
2. Turn it on again and let it turn itself off.
3. Plug your phone into a charger and, without turning it on, let it charge until the on-screen or LED indicator says 100 percent.
4. Unplug your charger.
5. Turn your phone on. It's likely that the battery indicator won't say 100 percent, so plug the charger back in (leave your phone on) and continue charging until it says 100 percent on-screen as well.
6. Unplug your phone and restart it. If it doesn't say 100 percent plug the charger back in until it says 100 percent on screen.
7. Repeat this cycle until it says 100 percent (or as close as you think it's going to get) when you start it up without being plugged in.
8. Now, let your battery discharge all the way down to 0 percent and let your phone turn off again.
9. Fully charge the battery one more time without interruption and you should have reset the Android system's battery percentage.
Remember that it is not recommended to perform this process all the time. Even when your battery is so dead your phone won't even turn on, your battery still has enough reserve charge to avoid system damage. But you don't want to poke the tiger with a stick. Perform this process once every three months at the most. If it is required more often than that you have bigger problems at hand.
Put plainly: fully discharging a battery is bad for it. Trying to overload a battery is also bad for it. The good news is that charging batteries automatically shut off when their safe limit is reached and there's always a little in reserve even if your phone won't start. But again: do this only when really necessary, because it does have a negative impact on battery life.
Guide taken of androidpit.com but it is very effective...
Click to expand...
Click to collapse
This is an alternate method. The simpler way OS to use the app called 'Battery calibration by NéMa'. The usage instructions are provided with the app. That is, to full charge it after calibration.
I've did this some times because changing roms sometime cause incorrect battery status. And it have not damaged my phone or battery.
Sent from my LG-D855 using XDA-Developers mobile app