Database Develop

first 25% of battery drops fast?

Ok so this is what i noticed has been happening with my phone...
I wake up in the morning and i unplug my phone from charger at 100% battery life...
after about 1-2 hours of no use (outside of occasional check of time) and no programs running i notice that 25% of life has diminished...
i have turned 3g off and done most of the kaiser tweak settings that help with battery life. for the rest of teh day i can use the phone and battery life runs normally but it seems the first 25 to 30% drops real fast without use
is everyone experiencing this? is it normal?
KP

The problem lies in your first sentence. "I wake up in the morning and unplug my battery." You are charging your battery too much thus killing it's battery life. I only charge my phone in the day while I'm at work. That way I can unhook it when it's fully charge. I would go on ebay and type in OEM battery Kaiser. You can pick one up for 15-30 dollars new.

From what I understand. Leaving your battery in the charger when it is fully charged should not damage the battery as long as its not there for an excessive amount of time but i might be wrong. Either way i have no way of charging the phone during the day as im on the go most of the time so this would mean even if i get a new battery it wont matter because it wile eventually do the same as i have only used this phone for about 3 or 4 months now. any other possibilities or solutions?
or should i just take it as it is and just buy a new battery maybe a bigger seido?

I thought Lithium ion batteries have overcharge protection. I charge mine overnight which I am sure a lot of others do also with no negative effects.

netboy said:
I thought Lithium ion batteries have overcharge protection. I charge mine overnight which I am sure a lot of others do also with no negative effects.
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I do... Maybe I shouldn't?

I would hope it has Overcharge Protection!!!
With NiCad Batteries if you overcharged them you would kill the life of the batteries.
And while all batteries do this LiIon are least tolerant. If you overcharge a LiIon battery, that is without Overcharge protection, the LiIon Battery with BURST INTO FLAMES! Thus the problem with the Sony Batteries that caused all those Laptop battery recalls.

gqstatus0685 said:
You are charging your battery too much thus killing it's battery life.
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Thats total BS with lithium batteries.
To the OP: Try running down your battery completely once, until the phone switches off by itself, then recharge fully. If you never do it and always recharge before the battery is empty the battery's power meter can lose its calibration over time and display weird things.
If it doesn't help, and you can notice a drop in overall life time you might need a new battery.

I have the exact same "problem" with my Tytn II.
Is slows down evenly though. (So the first 5 % of battery vanishes in minutes basically while the last 5 % can last for an hour, when it's half full % will last somehwere in between these two extremes).
Personally I've just interpreted this as poor measuring done by the hardware and/or software. (Ie I don't think the battery performs better the less full it gets as the meter in Windows would have me think)

kilrah said:
Thats total BS with lithium batteries.
To the OP: Try running down your battery completely once, until the phone switches off by itself, then recharge fully. If you never do it and always recharge before the battery is empty the battery's power meter can lose its calibration over time and display weird things.
If it doesn't help, and you can notice a drop in overall life time you might need a new battery.[/QUOTE
thanks ill try it out as soon as i get a chance...
kp
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Click to collapse

may seem a daft point but after draining the battery, dont charge with the phone turned back on. gives a fuller charge cos its not being used and makes it quicker to charge, lol

duke0102 said:
may seem a daft point but after draining the battery, dont charge with the phone turned back on. gives a fuller charge cos its not being used and makes it quicker to charge, lol
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Hmm...I don't see how turning my phone off to charge would increase the charging rate dramatically. My phone in standby mode uses 1% every 2 hours.

depends highly on roms and especially on radios.
with a crappy rom, battery could drop as fast as 10% per hour.
with a decent rom, battery drops in standby mode at a rate about 2% per hour.

duke0102 said:
may seem a daft point but after draining the battery, dont charge with the phone turned back on. gives a fuller charge cos its not being used and makes it quicker to charge, lol
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Click to collapse
If the phone is on but on standby that barely changes a thing. If it's on, with display illuminated then yes it might take you an extra 20 minutes to charge.. no big deal either.

*UPDATE*
ok so i drained my battery last night completely(turned on navizon, tt7, and skyfire) which took me about at most 2 hours.
Put it in for a charge
woke up at 9 and checked to see and it was 100%
I have push mail set to update every hour and i also run pocket sportscenter autoupdates which updates every 10 to 15 minutes
I used the phone for 5 minutes of calls
5 minutes of web surfing
a few text messages
and the occasional time check
at 6:30 pm battery life was at an amazing 90%
i was thrilled.
i continued to surf the web heavily from 730 to 8
a few more text messages
at 9 battery was at 67%
so i gotta believe that draining the battery helped recalibrate it...
i guess every 2 or 3 months i got to drain it out and give a full charge
thanks for the help guys
really appreciate it

my experience with a cheap aftermarket hd7 battery

Recently I bought a cheap battery which is obviously from china.
And it looks like the original HTC battery with the same black colour.
On first use it came with 80% charge level . I used the battery until it drained . It lasted the same as my original worn out battery of 6 months at the same percentage (maybe due to old batt stats in the is)
the following charge cycles( full drain and full charge)
First full charge cycle -battery only charged to 72%.
2nd cycle - battery charged to 75%
3rd cycle -battery charged to 83%.
one of the major difference is that with this battery,the phone shows that red juice cylinder , when it starts charging from 0%. Something I didn't saw with the original HTC battery after mango beta .
The first 2 cycles the battery exhibited the rapid drain symptom after plugging off the charger .
after the 3rd cycle it does not have this behavior and drained normally.
After this 3rd cycle the battery indicator was stuck at 80%. Used the phone for 3g browsing for 30 mins . Restarted the phone and it showed 91%. Used till 77% and charged the phone to 100%
At this time the battery is doing great . Will do another cycle a few days later to see how it goes.
In between these charges I had some small partial charges.
So far the battery now holds better and able to surf continuously on 3g for 40 mins and its at 90%, WiFi off , location on ,bt off ,battery saver on ,
the funny thing is that it is like the same quality original HTC battery .
is is mango with latest firmware update.

there are some problems with the original HD7 HTC battery.
mine did not last long before it died.
HTC needs to do QA on its batterires. They are the worst ever used

I recently (two days ago?) had a big 3500mAh battery arrive which i ordered from the internet, i paid about £14 for it. I've noticed it's a little weird in terms of performance, and i'm not sure if that's anything to do with the HD7 software side, or if i've just been ripped off.
3500mAh is ~3x the capacity of the stock HD7 battery so i was expecting charging times to be way, way longer but also for my phone to last a good deal longer too, but i've just been seeing major inconsistencies. My new battery would charge and discharge faster than the stock one that came with my phone, it'd stick on 99% charging, it's really confusing.
At the moment, it seems to be behaving itself with 56% time since last charge 15 hours, time remaining 9 hours. I have reason to suspect that when you use a new battery that the battery information Windows Phone 7/7.5 provides is WILDLY inaccurate, and it might take some time for the software to get used to the new battery.
I'm not sure, i'm just finding batteries really confusing!

Epsis said:
I recently (two days ago?) had a big 3500mAh battery arrive which i ordered from the internet, i paid about £14 for it. I've noticed it's a little weird in terms of performance, and i'm not sure if that's anything to do with the HD7 software side, or if i've just been ripped off.
3500mAh is ~3x the capacity of the stock HD7 battery so i was expecting charging times to be way, way longer but also for my phone to last a good deal longer too, but i've just been seeing major inconsistencies. My new battery would charge and discharge faster than the stock one that came with my phone, it'd stick on 99% charging, it's really confusing.
At the moment, it seems to be behaving itself with 56% time since last charge 15 hours, time remaining 9 hours. I have reason to suspect that when you use a new battery that the battery information Windows Phone 7/7.5 provides is WILDLY inaccurate, and it might take some time for the software to get used to the new battery.
I'm not sure, i'm just finding batteries really confusing!
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Click to collapse
try using a custom rom, the battery usualy lasts longer. the sdcard tweak works well . i beleive its a prblem with how wp7 OS handles the sdcard power management
i beleive the OS uses power consumption vs power capacity to judge the gauge. also u whenever u full charge the battery , u need to let it rest for a few hours. so ideally every evening u get home, charge it to 100 % from whatever is left with and unplug from the charger immediately after full. leaving it ont he charger whole night seems to drain it when u take it out fromt he charger next morning and start using it.
try using this app battery discharger ( free ) from the marketplace: it calibrated my battery well
when its close to dying like 20%, just run this app , and fully drained, charge full again
now my battery last 30+ hours on idle. i am not sure if yr 15 hours is correct on that size u have ,

Gishum said:
there are some problems with the original HD7 HTC battery.
mine did not last long before it died.
HTC needs to do QA on its batterires. They are the worst ever used
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yep i agree, the original HTC batteries seem to be worst than the cheap aftermarket versions

Battery Percentage reduced to 25%

Hi
My Nexus One just completed one year by this july.
And my problem is that My battery switches OFF at 23% battery.
That is, when it reaches around 23% it suddenly show 0% and switches off.
similarly when i charge the battery after around 75+ % it suddenly jumps to 100% percent and says charging completed.
I tried manually deleting the battery stats file.
I tried the Battery Calibration tool.
I tried charging the mobile to 100% as soon as its starts to shut down.
But still the same issue.
Is there a way to calibrate it or do i need to buy a new one ?
My rom : OxygeN1mod
I am getting around 6 to 8 hours if i use Gprs or wifi.
Another query :
in ebay.in 3200mAH battery is 9800 INR which is too high for me ( i bought my mobile for 14000 INR)
1400mAH battery is 2400 INR.
So is it better to buy a spare 14oomAH battery or a 3200 Battery ?
Please help me.
THanks in advance

Any one , please help

Tha'ts not normal if it's shut down at 25% ! ! !
Normally at 10%
Should buy à New One
If you don't care about the design of your n1. I suggest you the 3200 one
Sent from my Nexus One using Tapatalk 2

I heard that you can't fully charge the battery while the phone is running, it has too leave room since the battery is in use at the same time it's charging so it wont overcharge and ruin the battery.
So I was recommended to shut the phone off once in a while to charge the phone to full 100%.
Mine is now starting to die at around 20% but when new it died around 10%, newer lower.
But then again the battery could just be going bad.
Sent from my Nexus One

Install de battery calibrator (for nexus one) search in the google play
Verify the field "battery age" and set to 100%
Reboot and give a full charge
Drain normaly the battery, and look the percentage of the shutdown
If your phone shutdown on the 15%, set the battery age to 85% (100%-15%)
If dont work try:
http://forum.xda-developers.com/showthread.php?t=702167

How do I synchronize my battery?

I have extreme battery drain from 100% until 97%.
I am pretty sure that it is the phone thinks the battery is 4100 mah, when mine is probaly something like 4020 mah.
Is there a way to change my battery stats?
And I have gotten the phone 2 weeks ago and drained it mutiple times from 100 to 0, so the battery should have have calibrated, yet it hasn't.

FluenThor said:
I have extreme battery drain from 100% until 97%.
I am pretty sure that it is the phone thinks the battery is 4100 mah, when mine is probaly something like 4020 mah.
Is there a way to change my battery stats?
And I have gotten the phone 2 weeks ago and drained it mutiple times from 100 to 0, so the battery should have have calibrated, yet it hasn't.
Click to expand...
Click to collapse
I don't think it's really a drain and it's actually pretty common. It's just how the charging cycle works. if you charge overnight it charges all the way to 100% and then it stops charging until something like 96% (if it drops too much it would automatically starts charging again). It keeps the gauge on the screen at 100%, but then drops when you first use it. When you start using it, it most likely it went from 98% to 97% but on the screen you saw 100% to 97%. If immediately after waking up you unplug it and plug it in again for about 10 minutes, you'll notice it takes a little longer to go fro 100% to 97%.

Xiaomi programmed obsolescence on battery

H, since I updated from miui 10 to miui 11 and even now that I have miui 12 I have noticed that the battery doesn't last as long as before. I state that since I purchased the phone (July 2019) I have always charged the battery in the best way trying to never go below 20% and trying not to go beyond 80% so I don't think a battery can lose more than 30% of its real capacity in less than a year of life. Starting to investigate I found that the battery does not charge at its real capacity i.e. 3300 mAh but at around 2200/2300 mAh. To verify all this I have carried out several tests and the easiest way to verify it is to look at the battery characteristics through the AIDA64 app (screenshot below). From these tests it seems that the device limits the real battery capacity by not allowing it to be charged to its maximum capacity. A reply to what I wrote can be found by looking at some system files that are located in /sys/class/power_supply/battery. In particular, looking at the file called charge_full (screenshot below) you can see how the value of the file is much lower than the real battery capacity. I hope someone more competent than I can understand how to solve this hateful problem and I also invite you to check the value to try to better understand the cause of this problem.

I'm using miuimix 12.0.2 stable and the capacity is not 3300, either.
---------- Post added at 10:03 AM ---------- Previous post was at 09:59 AM ----------
And sorry i don't know how to post a picture, mine is 2943.

I know that batteries won't be forever and are always decreasing during the year but I think Xiaomi do a good job. I have some devices from 4 years ago and they reduced their batteries just a little. In the case of Mi 9 I have it since March 2019 and my battery still being the same. I charge it from 10-25% to 100% just some times I charge it until 80-90%, maybe every month I let it to 0% I wait for a while and charge it again to 100%.
Sent from my MI 9 using Tapatalk

From the photo you posted it doesn't seem that your battery is fully charged .. we have done other research and we have discovered that most likely Xiaomi has inserted in the kernel a sort of programmed obsolescence on the battery.

Can you disclose some of the research you done on the kernel it seems interesting. I have checked with Aida64 my battery before and it never charges to 3300 even if you leave the phone plugged in the value will keep increasing but once you plug it out it drops...still getting about 5 hrs sot so not bad...I wonder if you change that value in the full charger screen you posted what will happen?

"From these tests it seems that the device limits the real battery capacity by not allowing it to be charged to its maximum capacity. "
Actually it's better for battery life longterm to keep the device in the middle - never 0, never 100
I've certainly lost no battery life in the year + I've had the Mi 9

You are doing a good job of using the phone in the 20 to 80% range. But do you charge it at the lowest possible temperature? Temperature is a battery's worst enemy. Wireless charging is a joke. It's a glued heater in the battery.
I for instance, almost all the times charge it in front a mini fan. With this I can charge it 5ºC below normal temp charge.
And like @cezikos said, use quickcharge only on emergencies. Use at max a 1.5Amps charger. Quick charge is a marketing thing. The chemistry of the batteries are almost the same in this 10 years.
Mi mi9 have one year and the battery is 100%.

The important thing that you should precise is a type of charger that you are using. Do you use Quick Charge? If Yes, then battery capacity will be dramatically degrated. I use 5V 0.5-1.5A charger, it depends how fast I need to charge the Phone.
The next thing is a battery temperature, not Only while charging the Phone but also when you are using it. I`m using CPU Monitor and it's overlay to see the battery temp, you can also configure alerts when battery is starting to overheat.
Heavy Gaming decreases the life of the battery, there are a lot of variables that you have to cobsider, not only "programmed obsolescence"

I had the same problem. Hopefully the battery could make 3 hours of screen, the strange thing was that suddenly it began to last very little, and I was with that problem for a couple of weeks, so I decided to calibrate the battery hoping to have some results and now the battery lasted again approximately 7 hours of screen. Try to make the battery run out from 100% to 0%. The system will not let you start because it calculates that it has no battery, so what I did was leave it in recovery mode and with the screen always active, until it turns off completely, then with a 5V 1A charger. With the phone turned off, charge it until it reaches 100%. I did it three times and the battery was back to the way it was before. You could try to do the same and I hope you can solve that problem.
Sorry for bad English

I tested, I put the phone to play videos until it turned off. In 1% I cleared battery stats.
Then plugged the charger and entered the TWRP and unplugged. Put the backlight to maximum, and the phone stayed on more than an hour!
Then I plugged the charger 1.5A and let it charge to max.
It worked, now the phone has a steady discharge, not discharge 100% to 80 in an hour.
I will do this procedure from time to time. not the best for the battery, but is needed in mi9...
It's an absurd that this problem exists in 2020, my galaxy S2 don't have such harsh problems with something so simple and basic like battery management!

Battery on my Mi9 (mildly used in one year) lost 500 mAh.

Confirmed, with this trick, in doing it ONE time, I have the phone running well again, more than 8h screen on.
0.5 discharge in sleep.
.eu 20.3.19

onolox said:
I tested, I put the phone to play videos until it turned off. In 1% I cleared battery stats.
Then plugged the charger and entered the TWRP and unplugged. Put the backlight to maximum, and the phone stayed on more than an hour!
Then I plugged the charger 1.5A and let it charge to max.
It worked, now the phone has a steady discharge, not discharge 100% to 80 in an hour.
I will do this procedure from time to time. not the best for the battery, but is needed in mi9...
It's an absurd that this problem exists in 2020, my galaxy S2 don't have such harsh problems with something so simple and basic like battery management!
Click to expand...
Click to collapse
Thanks! I just don't know how to clean the battery status...

You will need root.
Then are several apps that can do it. Like l speed or adiutor.

And now again confirming, in one month the phone is completely lost regarding battery again, just 3h SOT from 80 to 20. There's some pretty **** up code regarding battery in xiaomi android.

I have no problems at all using it since release.
newest xiaomi eu.

I also have problems with battery drain...

Hello guys, just want to share with you a little trick that just helped me get better SoT. First of all, I just want to mention that I'm on the newest xiaomi.eu rom (20.8.13) and that AccuBattery is showing that my battery is at 2500mAh estimated capacity. (That might be different in reality, because it's only after one charging, so don't believe it that much). Lately I noticed a significant drain while the phone was idle (screen turned off). It was draining like 1-2% every hour and I could barely get over 5h SoT. So I investigated a little bit, and found a solution on reddit. The thing was that I had many apps on autostart. If you want to check them and turn it off then open Settings > type 'autostart' in the search bar > open it > 3 dots > show system apps > turn off every unnecessary app that you think don't need that option. I turned off every app, except: Gmail, GPay, Google Photos, Clock, Calendar, Bank app, Weather app and the app called 'safety system addon' - it might be called different because I'm not on english language on my phone. I left them on just in case to have notifications/synchronization, though i don't know if it's necessary. After that there was almost 0% idle drain over the day. Now I'm on 5h4m SoT and still have 25% of battery left. The result might be even better, cause I did this trick just today while my phone was on 90-85%.
Give it guys a try, hope it will improve your daily experience with Mi 9.
P.S. Let me know guys If I could turn off the before mentioned apps and still get notifications and sync from them.

Mine reports 2800mah, debloated with Szaki tool all autostart apps disabled also did factory reset after miui12 update.
Really sad how bad miui12 has turned for me. Im having way worse battery life compared to miui11 the idle is mostly the same its just the battery doesn't last as it used to last with miui11.

onolox said:
I tested, I put the phone to play videos until it turned off. In 1% I cleared battery stats.
Then plugged the charger and entered the TWRP and unplugged. Put the backlight to maximum, and the phone stayed on more than an hour!
Then I plugged the charger 1.5A and let it charge to max.
It worked, now the phone has a steady discharge, not discharge 100% to 80 in an hour.
I will do this procedure from time to time. not the best for the battery, but is needed in mi9...
It's an absurd that this problem exists in 2020, my galaxy S2 don't have such harsh problems with something so simple and basic like battery management!
Click to expand...
Click to collapse
I can confirm this. AIDA64 said my battery was at 2550mah capacity when fully charged. I followed this procedure and now after being fully charged, it says 3125 mah, which is much better.
I'm curious about the screen on time now. Me happy. Thanks!