I'm asking this question out of curiosity and based on the fact I can't find a definitive answer.
When I did my root, I used the Volume Up + Home + Power button method.
Is there a difference if I use Volume down + Home + Power? Or does it boot into the exact same screen?
Furthermore, I did not see this mythical "reset battery stat" option that people have mentioned. Can anyone shed some light on its' whereabouts?
Last time I fooled around with this type of stuff, I accidentally wiped my phone... I don't want to risk doing it again by experimenting.
Thanks for the help!
Resetting battery stats is achieved by:
1. Have a rooted phone
2. Have a terminal application
4. discharge phone to 15%
5. charge phone to full and while still on charger
3. in terminal application enter following:
su
rm /data/system/batterystats.bin
someone correct me if i'm wrong
Related
Hiya,
I was poking around the forums a couple days ago and I stumbled across a hack that recalibrates the phone's battery STATUS, it doesn't do anything about helping battery life or anything.
Last night when I was about to go to sleep I had a battery life of 32%. I plugged in the phone, and immediately restarted it. When it booted up again, I kid you not, it had 63% battery life. I turned off the phone while plugged in to see the battery icon, the one that shows.the battery status while its charging with the phone off, and indeed it showed around 63,65%.
Anyone know where I could find this? I think its buried somewhere on the forums.
Sent from my SAMSUNG-SGH-I897 using XDA App
locsplitter said:
Hiya,
I was poking around the forums a couple days ago and I stumbled across a hack that recalibrates the phone's battery STATUS, it doesn't do anything about helping battery life or anything.
Last night when I was about to go to sleep I had a battery life of 32%. I plugged in the phone, and immediately restarted it. When it booted up again, I kid you not, it had 63% battery life. I turned off the phone while plugged in to see the battery icon, the one that shows.the battery status while its charging with the phone off, and indeed it showed around 63,65%.
Anyone know where I could find this? I think its buried somewhere on the forums.
Click to expand...
Click to collapse
THIS WILL HELP RECALIBRATE YOUR BATTERY SO YOU DON'T HAVE THAT ISSUE
1.Charge till full when powered on
2.power off
3.charge till full again
3.boot into recovery(adb reboot recovery or Power off the phone and then hold the volume up + Volume down + the power key. When it goes black the 2nd time release the power button and keep holding the volume buttons.)
3.wipe stats by going into Clockworkmod recovery -> advanced -> wipe battery stats.
4.boot and continue to use as normal
Heres 1 from another board:
""So, you are having trouble with your battery seemingly draining too quickly, especially after having flashed many ROMs/Kernels/etc...
It is possible that the problem (or part of the problem) is not necessarily the phone using too much power. If this is the case for you, you should see some results from doing the following:
1. Connect the phone to the charger with the phone powered on, and allow the phone to charge until it shows 100%
2. Disconnect the phone from the charger, and power it off.
3. Reconnect the phone to the charger with the phone powered off, and allow the phone to charge until the battery indicator shows 100% (you can use vol-up/vol-down to make the indicator come back up when the screen goes to sleep).
4. Disconnect the phone from the charger and power it on.
5. Once the phone is powered completely on, power it off again and reconnect it to the charger until the battery indicator shows 100%.
6. Disconnect the phone, power it on, and use it.
You should only need to use this sequence one time.
Hope this helps.-Joeybear23"""
Hello guys!
I stumble from time to time upon a phone that does not want to start. I mean the only thing I can do is go into download mode.
No recovery whatsoever, no boot, no booting screen, nothing at all, only download mode by pressing vol down + home + power.
The only thing I've figured out to get it work again is to deplete the battery (in download mode) and when I plug it from battery at 0%, I can boot it again.
The only hmmm... should I say symptom here?... I see is that it never (or very scarcely) get into 'charging' mode. What I mean is it can charge up to 100%, but when I go to see the battery usage it is like power comes from nowhere. The blue line for "Charging" is black and it is as if my phone was on battery for 6 days with downs and ups in the graph.
I have tried to go back on cm7.1 stable for some time and sure enough, one day I can't reboot my phone. Every time I have to power it down I'm like "Oh! Power of the Universe, please, PLEASE, make it so that my phone will power up again, soon, not in a few hours... Please?"
Oh and to make things worst, I can't adb my phone anymore, nor can I use Odin... I have tried Google USB ver 4 but it doesn't want to install on my win7 64.
I'm now waiting for cm9 or teamhacksung's port to be more stable and see if it will solve my problem. But since then, I'm just wondering if there's something I could try?
Hi there,
I have unlocked my XZ before. Yesterday I seemed to flash a wrong kernel, and after that my XZ cannot work any more.
At first I tried to press the power button and it gave me no response, so did I do the hard reset(power button + volume up for seconds). Then I kept it charging on the wall to see what gonna happen, about 8 hrs passed and nothing special came out so I pull it out of the power. After a while when I press the power button again the power led blinked for three times just as the phone got too low battery to boot, then I charged it again, but the power led went off after several minutes. I tried to get it into flash mode or fastboot mode but I got no luck.(if I could get it into those modes I know how to recover it)
I saw the thread http://forum.xda-developers.com/showthread.php?t=1849170 and it talks about charging cycle like this:
On a working phone there are different stages of a battery's charging cycle. The stages are listed in order they happen. The cycle goes from a completely dead battery through a phone running on battery and back to a completely dead battery.
1.Dead battery. No response from the power button, no screen and no led.
2.Connect to charger
3.low battery level charging mode. This is when just the RED led is on and no screen. At this stage the battery's charge is to low to turn the phone on, but it is charging.
4.Kernel controlled off-line charging mode. This is when the battery has charged enough from step (3) and boots the kernel to charge the battery. The phone is off, but could be turned on using the power button. A quick press of the power button will show this battery icon. Icon will fill with charge.The kernel also controls charging when the phone is on.
5.Battery is fully charged.
6.Unplug the phone and turn on.
7.Battery is dead from normal use.
8.Repeat stages starting at (1)
The kernel of my phone got bricked so I think my phone can be charged on the step 3 but when the power is enough to power on it tries to get onto step 4, and then it fails to be in the offline charging mode, at same time the power led goes off, as it was totally dead. I think if I could get my phone into flash mode before it tries to be on step 4 it can be recovered but after several tries I still couldn't do it.
Any suggestions? Thanks.
If I were you I would try harder to get into fastboot and flash a kernel with recovery.
Still, whenever you have troubles on an Unlocked device, resort the official flashtool.
Emma Flashtool
how do you flash a wrong kernel? there is only one Dev kernel.
G1_enthusiast said:
how do you flash a wrong kernel? there is only one Dev kernel.
Click to expand...
Click to collapse
Probably flashed the 4.2.2 version on 4.1.2 or the other way round.
kailiu said:
Hi there,
I have unlocked my XZ before. Yesterday I seemed to flash a wrong kernel, and after that my XZ cannot work any more.
At first I tried to press the power button and it gave me no response, so did I do the hard reset(power button + volume up for seconds). Then I kept it charging on the wall to see what gonna happen, about 8 hrs passed and nothing special came out so I pull it out of the power. After a while when I press the power button again the power led blinked for three times just as the phone got too low battery to boot, then I charged it again, but the power led went off after several minutes. I tried to get it into flash mode or fastboot mode but I got no luck.(if I could get it into those modes I know how to recover it)
I saw the thread http://forum.xda-developers.com/showthread.php?t=1849170 and it talks about charging cycle like this:
On a working phone there are different stages of a battery's charging cycle. The stages are listed in order they happen. The cycle goes from a completely dead battery through a phone running on battery and back to a completely dead battery.
1.Dead battery. No response from the power button, no screen and no led.
2.Connect to charger
3.low battery level charging mode. This is when just the RED led is on and no screen. At this stage the battery's charge is to low to turn the phone on, but it is charging.
4.Kernel controlled off-line charging mode. This is when the battery has charged enough from step (3) and boots the kernel to charge the battery. The phone is off, but could be turned on using the power button. A quick press of the power button will show this battery icon. Icon will fill with charge.The kernel also controls charging when the phone is on.
5.Battery is fully charged.
6.Unplug the phone and turn on.
7.Battery is dead from normal use.
8.Repeat stages starting at (1)
The kernel of my phone got bricked so I think my phone can be charged on the step 3 but when the power is enough to power on it tries to get onto step 4, and then it fails to be in the offline charging mode, at same time the power led goes off, as it was totally dead. I think if I could get my phone into flash mode before it tries to be on step 4 it can be recovered but after several tries I still couldn't do it.
Any suggestions? Thanks.
Click to expand...
Click to collapse
fastboot and flash mode are at the lower levels and should not be affected by what Kernel you flash.
And since these modes do not use your screen, they don't really need a minimum battery level, although it wouldn't be safe to flash at low battery level.
What you can do is, power off your phone and disconnect from the wall charger.
Connect your phone to the PC while holding Volume Up.
This should put your phone in fastboot mode.
Let it stay this way for a couple of hours, you should be able to get some power in the battery.
Get the right kernel for your device's current firmware from here.
DooMLoRD said:
4.2.2
.423 - v9
4.1.2
.307 - v8
.253 - v7
.434 - v3, v4, v5, v6
.350 - v1, v2
Click to expand...
Click to collapse
Install the kernel via fastboot
DooMLoRD said:
download the kernel package update.zip
save it on c:\ and extract the boot.img from the package
save the boot.img to the folder containing fastboot binary
flash the boot.img using fastboot:
Code:
fastboot flash boot boot.img
reboot from fastboot
Code:
fastboot reboot
the device should now start booting, enjoy the kernel
Click to expand...
Click to collapse
If you are unable to follow these instructions or you have any doubts, feel free to ask I'll do my best to explain.
Thanks to all the fellows who helped me before. The most serious problem was I couldn't even get my phone into fastboot mode or flashmode.
Finally I sent my phone to the customer service. Luckily enough they didn't check whether its bootloader is unlocked or not and returned it back to the factory. Still waiting for what's gonna happen.
Well, title says it all. A horrible combination of problems, since i have to get in fastboot to wipe the cache, which only can be done with volume down. Battery reset by pressing power + vol down + vol up doesn't work either for the same reason. Its horrible. I don't know what my best option is. For some reason, I always get stuck with a device which is screwed on the essential points. My previous Sensation lost its volume key as well..
And the most interesting / ridiculous thing is, that the vol up key DOES work. It's only the volume down key. From outside, you can't see any damage. You can just push the key.
Volume problem: https://www.youtube.com/watch?v=Ij_GldgwJFM (not me)
Battery problem: https://www.youtube.com/watch?v=r_Nll_01jG0 (not me)
Any advice?
Some progress, removed the volume button cap, and after some fiddling with the metal contacts underneath my vol down works.
However, battery problem still persists. Again, problem is twofold: 1: battery charges only when turned off, and very slowly. 2: battery drains much faster than normal. Here's what I did till now:
- Factory reset
- Wipe cache partition
- Battery reset trick (not sure if it works, the phone just keeps booting, how do i know if its succesful?)
- Removed some dust from the port, cleaned the contacts with alcohol
- Charged to 98 percent, then repeat step three, no difference
Things I can think of:
- Buy cans of compressed air and contact cleaner to clean port even better
- Order a new micro usb port
Any help is very much appreciated!!
Needy bump
So here is the situation...I bought my wife and I X4s from Google Fi about a year ago and my wife has recently been complaining about her power button not working (though it still functions via the thumbprint). At first I thought it was her abusing the phone (like the last 3 she has destroyed) but because of her insistence that this time was different and the fact that this is a common failure mode of these phones (example 1; example 2), AND the fact that Google had a 1 day, 1/2 price sale on Pixel 3s, I got her one of those.
So now I have a backup phone that has a broken power button with a workaround. What is the best way to prolong the life of the battery in that phone? Let it power down and leave it idle for a year? Always keep it plugged into a low power USB power source?
PS - any easy way to get chop/chop->flashlight and swivel->camera on onto a Pixel?
Best way is to charge the battery to around 60% and then power off.
Leaving the battery alone for one year with a 1% or a 100% charge would definitely damage it.
That is consistent with other lithium ion battery management (non-cell phone) advise I have found in research and I am going to do it that way. The problem I encountered was that, I can't just power down (broken power button).
That being said, I did find the following using adb/fastboot:
To power down: adb shell reboot -p
This brings the X4 to a powered off state and when plugged in shows a recharge status. However, when you plug it in, it will NOT allow you to do anything without the power button.
To power up: hold volume down and plug into computer. This should bring you to the fastboot menu. On the computer type: fastboot continue That will bring you back in as normal.
Another update. Since it is now my backup phone, I am experimenting. I followed the below instructions to unlock the bootloader and root the phone and it essentially worked perfectly (instructions wise):
https://forum.xda-developers.com/moto-x4/how-to/guide-how-to-root-moto-x4-install-twrp-t3806460
Because my power button is broken, I had to modify the instructions. Instead of booting into TWRP after installing (which requires the use of a power button), I just pushed the twrp image again and then installed magisk.
Note that Motorola's unlock site was sort of down when I did it but there is a forum that Moto regularly checks if you run into problems which is here:
https://forums.lenovo.com/t5/MOTORO...-Unlock-Problems/td-p/3222809/highlight/false
And yet another update. After I rooted, I installed Custom Quick Settings and created a Reboot quick setting to replace the functionality lost with the power button. There is also a reboot into recovery option that should allow you to get into twrp.
Also, if your power button is broken, you need use the thumbprint as your unlock because otherwise, you won't be able to wake up the phone. I don't know if this works with the noNavigationBar setting but I don't want to risk it.
sleze said:
To power up: hold volume down and plug into computer. This should bring you to the fastboot menu. On the computer type: fastboot continue That will bring you back in as normal.
Click to expand...
Click to collapse
My phone's button is still not broken, so I did a
fastboot oem off-mode-charge disable
Click to expand...
Click to collapse
and now it powers up when I connect it to a charger.