Hi guys, I've had a look around and see that 4200mV is what we want on full charge (which I can get fine) but my phone powers off at about 3600mV. It currently on 18% at 3713mV.
What would be the best way to lower this to around 3200mV so I can get more out of my battery? I have seen a new kernel might help, but no sure where to start. I am currently running a NAND instal of americandroid thanks for any help
Anyone? Just tested with a diff battery and re calibrated but still same results
From my experience, I had about 3,5k V for 0%, right now I'm down to 3,1k.
All I did was running larger charge cycles and left it get down to 0% everytime.
I heard over time it gets better, like mine.
I have downloaded battery monitor widget, there it shows me my consumption, mAh and also voltage, with 100% and 0% range.
However, I wouldn't worry about it, the mAh are important, if you are getting 1230. That is the full charge as I know of.
Good luck!
Just search 'battery calibration' on XDA and there should be a thread with all the info on it
Sent from my Cyanogen HD2
Related
Hey all,
I am now using the seidio 3000mah battery, and I love it. However, the 'low battery's state of the phone (low brightness, no camera, etc.) Now last for 6 or 7 hours or more with heavy use....no joke. I think its the 15% or lower mark
Is there a way to tell my phone that the battery is not actually low.....
Thanks in advance,
Matt
Not that I know of at this point. I have the 3500mah battery and experience the same nonsense.
Lol. It is doing that because the battery is low. All the battery stats are based strictly off voltage.
4.2 volt is full
4.0 volts is 80 percent
3.8 volts 60 percent
Blah blah....
So by the time your phone shuts the camera down your battey Is actually low, the problem is that your battery has double the capacity so your low time is twice as long.
The easy fix is to flash a rom that has that fixed. The hard part is to find that rom.
The phone is working exactly as designed.
You can try to reset battery stats and relearn. All that does is tie percentages to voltages though. It might help you some.
Sent from my Onyx 4.2 powered Vibrant
battery drain pretty fast when using WIFI than using carrier's 3G network
Is it normal or something wrong?
currently using CM 6.0.0 DS
The battery draining quicker on Wifi is normal, but it can get excessive. Fully charge your phone with it on, turn off the phone and let it charge 8 hours, boot into recovery and wipe battery stats, use the phone as normal until it turns itself off (battery dies), charge 8 hours, and finally use it as normal. Should help extend your battery life.
ok. thanks for the idea.
I did do a full charge and let it used up until it cant reboot, and charge again when i got the new battery like 5 times. I think it would help also.
Before this, I thought cell's signal sending to the tower would use more power since it can send further.
Btw, is there a guide to see how to wide the battery stats? going to do search though.
I just check out some thread about battery stats.
My battery goes to around 2% at 3700, 100% around 4200.
What does a normal htc magic battery would show under a near perfect condition?
I saw some say 3000, or 3200 etc, so maybe my 3700 is too high at 2%?
What I recommended will extend your battery life. Not sure I'm following what your saying in the last post.
Sent from my T-Mobile myTouch 3G using Tapatalk
i have done those steps also some time ago... but battery really drains very fast on wifi... i think it must be something about the driver used... because HTC roms don't drain so fast in wifi
DonJuan692006,
Those number are the battery's internal energy level, in mv
4200 mv is usually normal maximum for LI battery at 100%
But i see some having alot of different value for 0% mv value, mine stays around 3700+ mv, so it seems somewhat higher than normal, maybe that's why i have less battery.
So trying to find out what is the normal 0% mv value for most good battery.
blizard80,
yes, i found out the CM rom drain alot faster than the stock htc magic rom when running wifi, so it is Normal to have wifi drain faster than cell's normal data draining but not so normal to drain this faster so significantly.
DonJuan692006:
After charging it for 8 hours when it is turned off, and boot into recovery and dis connect the power cable and turn it on and use it till it dies?
After the phone dies because of no battery, i charge it for 8 hours without turning it on or while it is on?
thanks.
After it dies I don't think it will really matter if its on or.not while charging, but I think the best result would be obtained from charging it fully while on and then turning it off and charging for 8 hours again.
Sent from my T-Mobile myTouch 3G using Tapatalk
It is still early days, but I thought I'd share this with all Android users on the HD2.
Like almost all members here, I flashed my HD2 to Android, now using a ROM on the SD, which takes up more battery power. Like almost all users, I too got battery draining issues. So I bought an original HTC 2300mAH battery, and.... no difference!
After installing a simple app called Battery Monitor (NOT Battery Monitor Widget), and changing the battery reading to volts within the app, I continued using the phone. The app showed, at the time of installing, 85% and the standard icon showed 43%. I disabled power saver and continued using the phone ignoring all battery warnings. The battery monitor showed 65%, when the standard icon showed 3% late in the night. I kept the phone on all night with syncing on, expecting the phone to switch off, but, in the morning, the standard icon showed 2% and Battery monitor, 58%.
My point being, the standard battery software clearly didn't read the extended battery's charge/discharge levels and probably needs to be recalibrated. Also, could it be that the standard batteries too are not being read correctly? I mean, we all may be thinking that the HD2 is a power hogger, which may not be the case.
I will be trying this experiment on the standard battery as well, and let all know on this.
jiggyk
Hit "Thanks" if you found the post useful.
do the battery calibration. completely charge and keep phone charging, open termimal emulator and type:
$su rm /data/system/batterystats.bin
reboot phone, after completly reboots remove the batterystats.bin again and then unplug phone and allow to die out. recharge and it should start reading correctly... 100% is aprox 4.2+, use battery indicator to read battery levels and info.
Sent from my DROIDX using the XDA mobile application powered by Tapatalk
jiggyk said:
It is still early days, but I thought I'd share this with all Android users on the HD2.
Like almost all members here, I flashed my HD2 to Android, now using a ROM on the SD, which takes up more battery power. Like almost all users, I too got battery draining issues. So I bought an original HTC 2300mAH battery, and.... no difference!
After installing a simple app called Battery Monitor (NOT Battery Monitor Widget), and changing the battery reading to volts within the app, I continued using the phone. The app showed, at the time of installing, 85% and the standard icon showed 43%. I disabled power saver and continued using the phone ignoring all battery warnings. The battery monitor showed 65%, when the standard icon showed 3% late in the night. I kept the phone on all night with syncing on, expecting the phone to switch off, but, in the morning, the standard icon showed 2% and Battery monitor, 58%.
My point being, the standard battery software clearly didn't read the extended battery's charge/discharge levels and probably needs to be recalibrated. Also, could it be that the standard batteries too are not being read correctly? I mean, we all may be thinking that the HD2 is a power hogger, which may not be the case.
I will be trying this experiment on the standard battery as well, and let all know on this.
jiggyk
Hit "Thanks" if you found the post useful.
Click to expand...
Click to collapse
Hey!
You do realize, that the difference between the android system battery level and the battery level provided by the app "battery monitor" is due to different minimum voltage levels?
The minimum voltage level where the system would shut down is around 3.600 mV.
The minimum voltage level of "battery monitor" on the other hand is 3.200 mV by presettings. (actually you can set the minimum voltage manually)
As a result, "battery monitor" lets you discharge the battery more which results in a longer time you can keep the device running.
I would be careful though, cause undercharging is very bad vor lithium batteries, meaning a decrease of the battery lifetime.
Take care,
Ric
akaruna said:
do the battery calibration. completely charge and keep phone charging, open termimal emulator and type:
$su rm /data/system/batterystats.bin
reboot phone, after completly reboots remove the batterystats.bin again and then unplug phone and allow to die out. recharge and it should start reading correctly... 100% is aprox 4.2+, use battery indicator to read battery levels and info.
Sent from my DROIDX using the XDA mobile application powered by Tapatalk
Click to expand...
Click to collapse
This command, it removes batterystats.bin, doesn't it?
ricola7 said:
Hey!
You do realize, that the difference between the android system battery level and the battery level provided by the app "battery monitor" is due to different minimum voltage levels?
The minimum voltage level where the system would shut down is around 3.600 mV.
The minimum voltage level of "battery monitor" on the other hand is 3.200 mV by presettings. (actually you can set the minimum voltage manually)
As a result, "battery monitor" lets you discharge the battery more which results in a longer time you can keep the device running.
I would be careful though, cause undercharging is very bad vor lithium batteries, meaning a decrease of the battery lifetime.
Take care,
Ric
Click to expand...
Click to collapse
Hi!
At the time I wrote this, it was discharging and I was keeping an eye on the voltage. You're right, it completely discharged at around 3.66, and I set that as the minimum voltage.
Regards,
jiggyk
you should install a kernel support extanded batteries
Sent from my HTC HD2 using XDA Premium App
securecrt said:
you should install a kernel support extanded batteries
Sent from my HTC HD2 using XDA Premium App
Click to expand...
Click to collapse
Thanks. I re-flashed with a ROM with a kernel for extended batteries. Now it shows the charge/discharge very accurately.
hi there!i am new to XDA. can anyone of you guys help me out with my battery problems.
I have a asus P320 windows phone . it shuts down itself when the power is still 70% . is there anyway to change the registry settings to prevent the auto shutdown due to low battery. i would'nt have bothered with this shutdown if the battery was old but i bought a brand new battery , and no matter what the ROM is it still switches off . I would really appreciate if someone could help me on this.
is there any way to change any of the registry values to disable the lowbattery warning and the autoshutdown.
The battery is not truly measured by "capacity". The capacity is derived from measurable data, mainly the voltage. The voltage for new batteries is very little depending on the load which is applied to battery. Over time (and charge cycles) however the chemistry in the battery is aging so that the load on the battery lets the voltage drop when load is applied. Load is anything like the CPU demand, lights on and so on.
So for your case it is highly probable that idle the battery shows 70% but when load is applied, the voltage drops below the shut off point and the device is off. There is no option to adjust this - it is hard-coded in the battery driver.
Have a look at my battery measurement thread linked from my signature to get some background and find a method to track this.
To give you a rough hint: fully charged, the device should be able to stay on with LCD light (fully lit) on for several hours. With what you report it should go off within less than 2 hours from my estimate.
tobbbie said:
The battery is not truly measured by "capacity". The capacity is derived from measurable data, mainly the voltage. The voltage for new batteries is very little depending on the load which is applied to battery. Over time (and charge cycles) however the chemistry in the battery is aging so that the load on the battery lets the voltage drop when load is applied. Load is anything like the CPU demand, lights on and so on.
So for your case it is highly probable that idle the battery shows 70% but when load is applied, the voltage drops below the shut off point and the device is off. There is no option to adjust this - it is hard-coded in the battery driver.
Have a look at my battery measurement thread linked from my signature to get some background and find a method to track this.
To give you a rough hint: fully charged, the device should be able to stay on with LCD light (fully lit) on for several hours. With what you report it should go off within less than 2 hours from my estimate.
Click to expand...
Click to collapse
Thank you for the quick reply. well, the battery does'nt last much time though . i tried to discharge the old battery (which i still have) to 0% and when i charge it for some time and switchoff the charger it shows some % of batter left and after sometime it shutsdown showing lowbattery warning.
I can understand this happening @ 5% or even 15%but @ 60%- 70% on a brand new battery is a bit much.
if only i could just prevent the autoshutdown, in the mean time i have to check on your battery measurement thread/
From my battery thread I have linked some info on battery chemistry. Bottom line is that LiIon batteries are aging from the day they are produced and the dependency on charge cycles or discharge depth is minimal (different to older type NiMH batteries). So even if you buy a "new" battery in the shop it may be 5 years old from its production date already.
My experience with after-market batteries (so non-original) is very bad. You almost never get good quality and usually old original batteries perform better. I have lots of batteries checked on the Typhoon/Hurricane/Tornado and several on Vox/Excalibur. Especially the true original branded like Sanyo, Celxpert or Samsung have sometimes exceptional performance. I have some of these that already have 5 years (of little to modest use) and still have their nominal capacity. Recently I bought an original packed battery for the Qtek 8310 (Celxpert) which should be 5 years old - and this one has its original capacity! On the other hand I have also bought cheap Chinese that have only 30% of the labeled capacity.
PROBLEM :-
On Defy Facebook Group --
Many of us are discussing about New/Replaced batteries Reporting Faulty Reading
Mostly all of us Have-- Motorola HF5X -- we don't if they are original OEM or not ---
Battery Charges OK somewhat around 4200 mV , but the problem starts after that , it starts to reduce % by % every Hour on standby .....
Like Just now my Battery is at 3% with 3773 mV , i know it lasts long , yesterday i played Youtube videos over wifi for 2.5 hours on 1% battery:laugh::laugh:,
its all because of faulty reporting , as battery has more Juice as it can been seen by mV.
A workaround has been mentioned by-Condrat Tiberiu
install battery monitor by sim2k from play store and set it to display % based on voltage. for a new battery range is 3150 to 4290mv. but you have to test and see the real range based on when it is fully charged and when it shuts down.
Click to expand...
Click to collapse
But if a Zip could be provided for such problem , We all will be thankful to who so ever help us ....
Thank You
well this is not really a workaround but mostly an add-on. the idea to search for such an app came to me while reading the "defy battery drops explained thread" and it's quite sad that this is the only one of its kind. so all credit goes to sim2k for making such a simple yet effective battery monitor based on voltage that can be used for accurate readings on li-ion batteries. sim2k made that monitor with 3rd party extended batteries in mind but as you can see it can be used for batteries that report fake values (aka cheap chinese clones with emulated controller).
for this to be a real workaround a developer has to figure how to hijack the android battery indicator and make it report % based on a voltage scale that can be manually calibrated for each individual battery and make it report values at a user set interval based on an average of the recorded values in that interval. that way the fluctuations should be reduced. and to make more real there should be some kind of conditions for the % to not go upper than the previous reported values but that will be hard to implement as voltage drops and goes back up based on usage and battery wear.
meanwhile this is the only solution that i can recommend for those who have problems with battery indicator. just install sim2k's battery monitor and learn to ignore the existing one.
if you want accurate reading based on voltage you must set the voltage range for your battery. to set the upper limit you need to charge to 100% (until green led turns on) and see what voltage is reported by the app. that is the voltage corresponding to a full charge and the upper end of the interval. the lower end should be around 3100mv more or less. again if you want to know for sure you have to watch the voltage when the phone turns off due to low battery. but i don't recommend anything lower than 3100 even if phone shuts down at 3000. the point is to have a preventive true 1% warning before the battery drops dead and to give you a little extra time to charge it back in order to prevent damaging the battery due to low voltage. full charge/discharge cycles should be avoided or done once a month at most. so you should charge the battery before it hits 3100mv (true 1%) preferably at true 15% or more. that should prolong the battery longevity and prevent extra wear.
Hey Many thanks that further clearing the things , atm i am using a widget which shows mV plus battery , and i am taking voltage reference for knowing the battery , like u said 3100 + mv time to charge up ,
apart from this issue using slimkat rom and its giving awesome battery backup