Database Users

Noticed something strange with battery level

Hi
I have noticed something strange happening with my phone. I have started charging it every night now so that it will be fully charged the next day.
When it is fully charged, I turn it off completely to save the battery, and to stop noisy email alerts. In the morning I turn the phone back on and it says 73% battery level, despite being turned off overnight, so nothing should be draining the battery.
If I leave the phone on Standby overnight the battery level is always 90%+ the next morning.
What the hell is going on? Does anyone else notice this quirk?

You can try another battery and oberve if the problem would still occur..

It could have something to do with the difference in temperature? In the morning it's coooled off and maybe that does something with the measurement?

Did you put ur fone into flight mode.

NewSPV said:
Hi
I have noticed something strange happening with my phone. I have started charging it every night now so that it will be fully charged the next day.
When it is fully charged, I turn it off completely to save the battery, and to stop noisy email alerts. In the morning I turn the phone back on and it says 73% battery level, despite being turned off overnight, so nothing should be draining the battery.
If I leave the phone on Standby overnight the battery level is always 90%+ the next morning.
What the hell is going on? Does anyone else notice this quirk?
Click to expand...
Click to collapse
Huh, I've never heard of that before, but then I never turn mine off. When you say "turn it off" I am assuming it is when you hold down the off button for a few seconds and answer yes to "really" turn it off. I think its very strange that it uses more power off than in standby. Maybe you have come across a nasty hardware bug. Keep us posted.

Matterhorn said:
Huh, I've never heard of that before, but then I never turn mine off. When you say "turn it off" I am assuming it is when you hold down the off button for a few seconds and answer yes to "really" turn it off. I think its very strange that it uses more power off than in standby. Maybe you have come across a nasty hardware bug. Keep us posted.
Click to expand...
Click to collapse
Yes I do mean holding down until it tells you data may be lost are you sure.
And it is still doing it. If I fully charge my phone at night and then leave it on standby the next morning the battery gauge will say something like 96%.
If I turn it off, it is always under 80% the next morning, this makes no sense. I leave the phone in standby now with the volume off, and the backlight and power set to switch off.
I keep it in a cradle now, this is a stock photo, not my phone in the cradle.

Charge your battery to FULL, then take it out of the phone when going to sleep, when you WAKE up, put the battery in, if it's at 100% or 99% then it's your PHONE. If it's at 96% like you said before then it's your BATTERY.

Memory card draining power
This was a ROM bug on i-mate JAMin on the first ROM versions that was available. A memory card inserted will drain power from the device. What brand do you have and do you have a memory card inserted ?

Fast Battery Drain over night

Hi guys,
I have a problem with my Jade. I've charged it last evening and I've barely used it. When I've went to bed it was 96% charged (ARIELbattery) and 10 minutes used.
This morning, when I've woke up, The battery was 33% and and the phone was 34 minutes usage time.
Something is wrong. Since there were no bluetooth, no wifi, no anything activated. And for sure, nobody played with the phone during the night.
This is not the first time when I see this behavior, but is the first time when the decrease is so big.
I suspect an app, but I do not know which of them. How can I see it?
Do you have other suggestions?
thanks!

There are some possible reasons:
Some SD-Cards seem to drain battery, so you can take it out for a test.
Some additional software is told to drain battery. Did you install something?
It is also helpful to switch to "flight-mode" over night. This normally reduces battery drain to nearly zero, if no additional consumers exist.

Hi,
Yes I've installed some software, like gAlarm, S2U2, icontact,ThumbCal, Skype, etc but last night none of them was started.
What can I do with the SD Card?! I need the SD-Card. Which card does not drain battery and which does?
I cannot turn off the phone over night.

Some clues here in this forum
http://forum.xda-developers.com/showthread.php?t=514556&highlight=battery

I've read those before posting, but there was no answer to my problem. I have 67% drop of battery in 8 hours without touching the phone.

This is most likely that your device goes to screenoff or unattended power state instead of sleep. Your power settings might be corrupted. To change that go to your power settings advanced tab and change everything there (checkboxes and sliders), press ok and then change them back as they were, press ok. I'd suggest to keep the device turning off in one minute while on battery and none of the checkboxes for cord powered mode. There is a really freaky thing that even if you get your device to sleep with power button it will go back to screenoff mode after time specified by the turn off device slider while on battery IF you don't have that turn-off-while-on-battery checkbox checked there.

darfri said:
even if you get your device to sleep with power button it will go back to screenoff mode after time specified by the turn off device slider while on battery IF you don't have that turn-off-while-on-battery checkbox checked there.
Click to expand...
Click to collapse
Thanks for the answer. But I do not really understand what you are saying here.
My power settings are: 30sec for Screen Light and 1 min for Device (on battery).
None of the check boxes is set for the case when the device is powered.

It could also be due to the battery defect. After some time the battery could lose its storage ability (because of the defect), despite the mAH stated.
As a comparison, my battery is nearly one year old. On full charge, overnight drawdown (on sleep mode) is about 2%-3% .

ungureanub said:
Hi,
Yes I've installed some software, like gAlarm, S2U2, icontact,ThumbCal, Skype, etc but last night none of them was started.
What can I do with the SD Card?! I need the SD-Card. Which card does not drain battery and which does?
I cannot turn off the phone over night.
Click to expand...
Click to collapse
I have no own experiences with this programs but Skype for example needs permanent connection to internet when activated (be care of the background job!). This uses data connection and this drains battery. I can not quantify this in %. In addition Skype does not allow the system to switch to deep sleep because it needs permanent connection!

None of the app was started. I just have Skype installed, but it was not used.

Uninstall S2U2 !!!!!

nicodbgh said:
Uninstall S2U2 !!!!!
Click to expand...
Click to collapse
I found some German threads that discuss a problem with this software and battery life. Some loose 10% over night others 50%. I think you should try to uninstall (and afterwards soft-reset!) for a night and see what happens.
Please keep us informed.

First of all, I've disabled the 3G. Now it only gsm with gprs. Since I've done this it seems the battery drop is ... super ok. If yesterday morning I've had 33%, this morning I've had 20%, so 13% drop in 24h, and the phone was used normally as before.
last night the S2U2 was not started.
I will wait until the battery level reaches 10% an I will do a full charge.
I will keep you informed. Thanks to all for advices!

Some clues here too ...
http://forum.xda-developers.com/showthread.php?t=471365&highlight=battery+3g&page=2

Hi,
So now, 2 weeks later... after setting my Jade to GSM only (no 3G) I get 7-8 days of normal usage. As I said, before I always had to charge it the third day.
Normally, i get -28mAh drain in standby. When the screen is on around -130mAh (for wake up) and then -70mAh. In a gsm call i get around -250mAh.
I did not switch the phone back to 3G yet, but I will and I will see again the battery drain.
PS: the values were provided by Mobadi.

i believe i have S2U2 installed... and my phones fine!
i have the overloaded rom... and battery life seems great only needs charging every 3 or so days and i do use it quite alot!

so...
after some time of testing and re-testing I still have, from time to time, the behavior that during night I see a massive drop in battery level and an increase of the usage time.
I do not know what is going on, but I suspect that some app is waking up the device to do some work (without turning on the screen), and the Jade cannot go to sleep anymore for a while.
I've notice the same behavior on a HTC Diamond 2.
Since none of the app I have installed on my Jade are installed on my friends Diamond2, I have no idea what app could do that.
If anybody has any idea, feel free .... I am idea-less!

I've made myself a little application to log the current values of the power data. So, I've saw that my phone wakes up each hour by himself, without turning on the screen, does some work (cca -70mA) and after 30sec goes back to sleep.
Any ideea about this?

Battery Drain is Broken ????

1st of all excuse me for my bad english.
I have a big problem with my N1 after a full charge in 4 hour and NO USE i have 32% of battery.
In 2 more hours i have no battery and request cable to charge and than shout-off-
I try different radio and rom and kernel
I wipe battery stat.
No way.
What i can try and if i need spare parts or service for my phone from USA and i'm in italy ??
Thanks.

Is your phone getting hot? I'm pretty sure, and it sounds like you agree, that this can't be a software problem.
Maybe bad battery? Is it a new N1? Any damage? Drops?

If your phone is getting warm it is most likely a software problem. Sounds like you just have a bad app in the background that won't stop, and it is running your CPU constantly.
Download a task manager (not for the auto-kill, auto-kill is bad) but use it to see if there is any app that is constantly using up your CPU.
Also download Spare Parts and check the battery history and see if anything is high on the "partial wake" screen.

i try 4 different rom, 2 radio e 3 kernel.
No changes
The phone never fall from my hand.
Yesterday i put in a LeoFroyo and just full charge and boot this morning 6:00 at 10:00 i have 40% of battery.
RMA ?

Ok yeah, sounds like a bad battery then, or worse.

Some news here.
I bought a new and original battery for N1 from HTC.
No solve the problem.
I fully charge battery and in 12 H is drained (also Time and Date reset).
I fully charge the battery and leave it out of the phone and NO DRAIN
I fully charge and put in the phone POWER OFF and is drained (cannot say in how many hours).
So the strange and new things are
1) Drain with the Nexus power off
2) No a battery problem
3) Reset time and date after drain
What can use battery in the phone when is power-off ?????
I write at HTC USA and Italy but they dot answer nothing. (2 weeks ago USA 1 week Ita) It's normal this delay ?

Actually powered off? Or do you just turn the screen off? Do you press and hold on the power button, then choose "Power off"?
12H is pretty good for the battery, considering it sounds like you have auto-updating things and use it a lot. If it is draining in 12H when you don't use it, you probably have installed an app that is misbehaving.

if you are losing battery power when the phone is off then this is a phone problem

Clarkster said:
Actually powered off? Or do you just turn the screen off? Do you press and hold on the power button, then choose "Power off"?
12H is pretty good for the battery, considering it sounds like you have auto-updating things and use it a lot. If it is draining in 12H when you don't use it, you probably have installed an app that is misbehaving.
Click to expand...
Click to collapse
No apps installed and clear and new firmware. And NO USE THE PHONE just power on and leave on the desk with black
screen and 12 hours drain.
Otherwise if i POWER COMPLETELY OFF the phone i have battery draining.
Blueman101 said:
if you are losing battery power when the phone is off then this is a phone problem
Click to expand...
Click to collapse
I think so someone have experience with HTC assistance ????

[Q] Battery Drain When Powered Off

Anyone else encountered this problem ?
I've had my Nexus 4 for 3 days now.
I turn my phone off every night. So two nights for this phone. Each time I have turned it off it has been fully charged, with the battery indicator and a third party app both showing 100 %. The next morning (about 8 hours later) I'm finding the battery has dropped to ~85%, so losing ~2% per hour when powered off.
Anyone else encountered this or know how to deal with it (before I contact Google)
Note - to power off I press the power stud until the Power Off menu appears, select Power Off, then click on OK to shut the phone down.
This is with Android 4.2.1

It takes power to turn the phone on. 15% might be a little much but it is not unlikely.
Sent from my Nexus 4 using Tapatalk 2

15% does sound a little high. OP, how's the battery life during daily/normal usage?

tengen said:
15% does sound a little high. OP, how's the battery life during daily/normal usage?
Click to expand...
Click to collapse
Battery life has actually been decent, I think I'm getting better usage than my old HTC Desire Z with extended battery. I'm not a heavy user, though I have been using it for music at work.

Hi
dapprman said:
Anyone else encountered this problem ?
I've had my Nexus 4 for 3 days now.
I turn my phone off every night. So two nights for this phone. Each time I have turned it off it has been fully charged, with the battery indicator and a third party app both showing 100 %. The next morning (about 8 hours later) I'm finding the battery has dropped to ~85%, so losing ~2% per hour when powered off.
Anyone else encountered this or know how to deal with it (before I contact Google)
Note - to power off I press the power stud until the Power Off menu appears, select Power Off, then click on OK to shut the phone down.
This is with Android 4.2.1
Click to expand...
Click to collapse
It takes a huge amount of battery power to start the phone from complete off, this also skews the first reading of the battery voltage as it will be lowered by the draw of power to start the phone so the indicator will read lower than it's true capacity.
The best solution is just put your phone in airplane mode at night, and turn airplane mode off in the morning, this is more power efficient than shutting the phone down using "power off", and you shouldn't see any battery drain apart from a percent or so doing this.
Regards
Phil

You can tell you guys never turn your phones off Starting up should have no battery drain - never been an issue on any of my previous phones and PDAs (last one also being Android).
I rang Google and they had never seen it before but recommended draining then fully charging the battery.
Friday night I made sur it was fully charged before unplugging and shutting down - next morning on turning on - 99% - result. Saturday/Sunday the same (note SAturday i fully drained then recharged the battery). This morning boots up with just 82%.
Looks like either it can't work out when it's fully charged, else there's some disharge mechanism in place to protect the battery and that's causing me issues.

It probably wasn't really at 100% even it was reporting as such. The reporting is broken. So when you rebooted you saw the real battery level.
Sent from my Nexus 4 using xda premium

I was just about to start a thread on this and then saw this thread here. So I'll ask here. I travel overseas a lot. So while I am on the plane I plug the phone in while off to charge it. I hit the power button occasionally to check the charge and when it shows "Full" I unplug it and throw it in my bag.
2 days later, I come back to the US and turn the phone on and the battery is usually below 50% even though it stated it was fully charged when I unplugged it.
So how does the battery drain if the phone is off?

I just sent my first Nexus 4 in for RMA on this very issue (if left for long enough it would just fully discharge), got the replacement on Friday, did a charge cycle, charged the phone fully up whilst off, took it off the charger (the official Nexus charger btw), and let it sit for the last day, just turned it on, and it's at 60%.... W T F !!!
This is sooo totally bizarre! I can only assume that this is common to most Nexus 4 (what are the odds of me getting two bad ones - direct from Google - with the exact the same issue?), and that people just aren't noticing, as most people don't leave their phones off after fully charging, and thus just never notice, as the battery behaves perfectly normally under usual use.
I would gratefully appreciate it if people could put this to the test, so I know whether or not to RMA the second device or not....

dapprman said:
Anyone else encountered this problem ?
I've had my Nexus 4 for 3 days now.
I turn my phone off every night. So two nights for this phone. Each time I have turned it off it has been fully charged, with the battery indicator and a third party app both showing 100 %. The next morning (about 8 hours later) I'm finding the battery has dropped to ~85%, so losing ~2% per hour when powered off.
Anyone else encountered this or know how to deal with it (before I contact Google)
Note - to power off I press the power stud until the Power Off menu appears, select Power Off, then click on OK to shut the phone down.
This is with Android 4.2.1
Click to expand...
Click to collapse
Are you using a custom rom, maybe its only sleeping.

Can't speak for the OP - but for me, no on both devices - totally stock. The latest one, box fresh on Friday! Also, the phone is most definitely OFF, and not just sleeping, ie, I press the power button & choose the "power off" option from the pop up. Unfortunately there's no way to really test this, by pulling the battery...

knowayback said:
Can't speak for the OP - but for me, no on both devices - totally stock. The latest one, box fresh on Friday! Also, the phone is most definitely OFF, and not just sleeping, ie, I press the power button & choose the "power off" option from the pop up. Unfortunately there's no way to really test this, by pulling the battery...
Click to expand...
Click to collapse
Why not just leave it charging when it's off..

steviewevie said:
It probably wasn't really at 100% even it was reporting as such. The reporting is broken. So when you rebooted you saw the real battery level.
Sent from my Nexus 4 using xda premium
Click to expand...
Click to collapse
Nah - I tested it multiple times on my first phone. One time I left it for over two days and the battery went from "reporting 100%" to being under 10% whilst turned off!! Also on all the charges - I deliberately would leave the phone on the charger for multiple hours, even after it was reporting 100%, as I had the same suspicion. Often I'd leave it to charge overnight...
I have never had this issue with any other phone, or with my Nexus 7 (which I have subsequently tested in this respect, and it is perfectly capable of holding a charge whilst off)
---------- Post added at 07:14 PM ---------- Previous post was at 07:10 PM ----------
joshnichols189 said:
Why not just leave it charging when it's off..
Click to expand...
Click to collapse
It's not so much that it's a practical issue, it's more that I'm worried that it might indicative of a larger hardware based defect, and I'm not happy spending my hard earned cash on faulty goods.
If it's a very common complaint/fault then I won't bother to RMA the second one, but if I'm just ridiculously unlucky, and very few people are experiencing this totally weird behaviour, then I'll take my chances on a third...
Also, I don't think it's too much to ask to be able to turn my phone off to prevent it from losing any more charge. I can think of a plethora of scenarios where this would be extremely useful...

I'm now convinced of three things.
1. Android 4.2.1 can not properly read the battery state
2. Shutting down the phone does NOT do that, but rather puts it in to a hybernate mode that still requires battery charge
3. There is a fundamental design flaw in the phone that part causes this.
Most mornings I find my previously shut down at 100% charged phone at only 80-85%, though occasionally it is as high as 97-99, but not often.
Oh and my ROM is stock, my phone is not rooted.

dapprman said:
I'm now convinced of three things.
1. Android 4.2.1 can not properly read the battery state
2. Shutting down the phone does NOT do that, but rather puts it in to a hybernate mode that still requires battery charge
3. There is a fundamental design flaw in the phone that part causes this.
Most mornings I find my previously shut down at 100% charged phone at only 80-85%, though occasionally it is as high as 97-99, but not often.
Oh and my ROM is stock, my phone is not rooted.
Click to expand...
Click to collapse
I agree on all counts apart from the first, as my nexus 7 and my Mum's Nexus 10 behave totally normally in this respect, both on 4.2.1 and 4.2.2 (both stock/unrooted, although the Nexus 7 was rooted/bl-unlocked for a time).
Also, I don't believe it's a miss reading of the battery state, as I often leave the device charging for multiple hours after it reports 100%, by which point it simply must be fully charged. What's more - if you leave the device off for long enough it will fully discharge! The craziest thing is that the phone's battery seems to drain quicker when it's 'turned off", than when it's powered on and sleeping. Seriously WTF.
It must be something to do with either the LG hardware, or LG specific code in the Google ROM. Obviously the phone is incapable of properly shutting down, which is pretty crappy for a so called "flagship" device. As someone who likes to have full control of their device, I find it more than a wee bit irksome, that I don't have the ability to completely shutdown my phone! This is also where the irremovable battery is annoying, because there's no way to test whether it's a hardware or software issue, although I guess I could try a custom ROM and see if it still happens.... however I don't really wanna root & rom if I'm going to RMA it....
I'm really interested to know how many other people have this defect and don't even realise it, because their phone is either in use or charging! I find it hard to believe that I could be unlucky enough to have got two uniquely defective devices in a row...
I'd really appreciate it if people could check their devices for this issue, both on stock and custom ROMs, see if we can work out whether it's HW or SW related...

knowayback said:
This is also where the irremovable battery is annoying, because there's no way to test whether it's a hardware or software issue
Click to expand...
Click to collapse
You could try powering it off with the bootloader. After you power off normally, hold power and volume down, when the bootloader menu comes on use volume keys to select power off and power button to confirm.
I'm hard pressed to believe the battery in my device would fully discharge if left off, when the phone arrived the battery wasn't dead, I got about three hours of solid tinkering before it died.

USSENTERNCC1701E said:
You could try powering it off with the bootloader. After you power off normally, hold power and volume down, when the bootloader menu comes on use volume keys to select power off and power button to confirm.
I'm hard pressed to believe the battery in my device would fully discharge if left off, when the phone arrived the battery wasn't dead, I got about three hours of solid tinkering before it died.
Click to expand...
Click to collapse
That's a good point. Mine came out of the box at about 80%.... hmmm. It could be that once it's first turned on it won't turn off again... this is such an odd issue! I shall try powering off from the bootloader next time, I'd still love to hear if other people's phones exhibit this anomaly though...
I'm aware that it's hard to believe issue, but there's only one way to find out...
I'm also very curious to know if loading a custom rom might solve it. I'm far less concerned if it's a software issue, I just don't want to have spend £250 on defective hardware.

I'm 100% stock, no Custom ROM nor kernal (kernel?) and my phone WILL discharge if left unplugged and "off". Happens every time I come back from overseas. Fully charge it up on the plane (even left the phone on but in airplane mode to 100% thinking that it was a misread of the battery level when the phone was "off") and still the same issue... turn it on a few days later and the charge is down to 75% or so....
I thought I was losing it... but I'm not the only one...

usafle said:
I'm 100% stock, no Custom ROM nor kernal (kernel?) and my phone WILL discharge if left unplugged and "off". Happens every time I come back from overseas. Fully charge it up on the plane (even left the phone on but in airplane mode to 100% thinking that it was a misread of the battery level when the phone was "off") and still the same issue... turn it on a few days later and the charge is down to 75% or so....
I thought I was losing it... but I'm not the only one...
Click to expand...
Click to collapse
Ha - me too! With the first one, I actually went into a weird sort of denial, where I kept convincing myself that I must of got it wrong, it just seemed so absurd! Eventually I put it to the test (multiple times) and realized that my memory wasn't as bad as I'd been trying to persuade myself and the phone was in fact discharging when "off".
Anyone else?
Just got the update to 4.2.2 and have got my fingers firmly crossed that it's now a squished bug... although somehow I think it's more likely an LG/hardware issue...

What you could try to do it charge the battery to 100%, hold the power button for 10 seconds until it fully shuts itself off. Leave it overnight and see the battery level is at the next day.

Turning on phone while charging

Hello all,
Recently i've been noticing that my GS4 battery is draining too fast, i think that it's time to recalibrate it. Since my phone is not rooted, i have searched for guides on how to recalibrate the battery.. and i found this one:
To calibrate your Android phone battery correctly:
1-First drain your battery down. Let the device switch itself off naturally. You will know if it is completely dead because it won’t switch on again.
2-Place the phone ion charge while it is turned off. Allow it to charge for at the very least 2 hours, if not 4, until the battery meter reads 100%
3-Switch on the phone while the charge is still connected to it. When your phone is on the home screen, leave the charger connected for a further 2 minutes before removing it.
4-Repeat the above steps twice more, always allowing the phone to completely discharge first.
The reason for leaving your charger connected is to allow the configuration files to update with the new, correct charge values. Some of the best ways to avoid battery usage is to make sure all connections are turned off when they are not in use – Wi-Fi, Bluetooth, GPS etc. Make sure your screen locks down in under a minute when not in use and that your screen is not set too bright
My question is.. is it safe to turn on the phone while it is charging? is it safe to turn on the phone when it is plugged to a charger while it is off?
Thank you in advance.

Gab! said:
Hello all,
Recently i've been noticing that my GS4 battery is draining too fast, i think that it's time to recalibrate it. Since my phone is not rooted, i have searched for guides on how to recalibrate the battery.. and i found this one:
To calibrate your Android phone battery correctly:
1-First drain your battery down. Let the device switch itself off naturally. You will know if it is completely dead because it won’t switch on again.
2-Place the phone ion charge while it is turned off. Allow it to charge for at the very least 2 hours, if not 4, until the battery meter reads 100%
3-Switch on the phone while the charge is still connected to it. When your phone is on the home screen, leave the charger connected for a further 2 minutes before removing it.
4-Repeat the above steps twice more, always allowing the phone to completely discharge first.
The reason for leaving your charger connected is to allow the configuration files to update with the new, correct charge values. Some of the best ways to avoid battery usage is to make sure all connections are turned off when they are not in use – Wi-Fi, Bluetooth, GPS etc. Make sure your screen locks down in under a minute when not in use and that your screen is not set too bright
My question is.. is it safe to turn on the phone while it is charging? is it safe to turn on the phone when it is plugged to a charger while it is off?
Thank you in advance.
Click to expand...
Click to collapse
Hi
Yes and yes
BTW I do not believe to much in those battery calibration methods , as far as i know a new file is generated each time you switch off and back on

You can charge your phone in any status, on, off, flight mode, playing games etc.It will only affect your charging speed.
As for calibration - I have heard about such thing and try to discharge my battery till some 1-3% and full charge at least once a month. Don't know if this helps. I think also important is the environment temperature and how you discharge the last percent.My suggestion is that last percent must be discharged as slow as possible - with screen locked let it die natural way, with normal usage, very slowly. I and other usually switch all possible things to drain battery faster at this stage. That seems wrong on my personal opinion.

Gab! said:
Hello all,
Recently i've been noticing that my GS4 battery is draining too fast, i think that it's time to recalibrate it. Since my phone is not rooted, i have searched for guides on how to recalibrate the battery.. and i found this one:
To calibrate your Android phone battery correctly:
1-First drain your battery down. Let the device switch itself off naturally. You will know if it is completely dead because it won’t switch on again.
2-Place the phone ion charge while it is turned off. Allow it to charge for at the very least 2 hours, if not 4, until the battery meter reads 100%
3-Switch on the phone while the charge is still connected to it. When your phone is on the home screen, leave the charger connected for a further 2 minutes before removing it.
4-Repeat the above steps twice more, always allowing the phone to completely discharge first.
The reason for leaving your charger connected is to allow the configuration files to update with the new, correct charge values. Some of the best ways to avoid battery usage is to make sure all connections are turned off when they are not in use – Wi-Fi, Bluetooth, GPS etc. Make sure your screen locks down in under a minute when not in use and that your screen is not set too bright
My question is.. is it safe to turn on the phone while it is charging? is it safe to turn on the phone when it is plugged to a charger while it is off?
Thank you in advance.
Click to expand...
Click to collapse
NO NO NO
Draining your battery is BAD!!! Draining it below 0 is the dumbest thing you can do. That damages your battery. Whoever made that "guide" has absolutely no understanding about his battery.
Calibrating is easy.
Charge to 100%. Pull your battery. Put battery back in. Charge again until full when powered off. Volia calibrated.
Though it will probably not help. My guess is that you just need a new battery (if it's no software problem).