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[Q] Battery Life & More

Ok I have a Motorola Atrix HD running Cyanogenmod 10.1.3 and using the EB40 battery.
1. I would like to know what charger I should be using, I have the 850mA motorola charger that came with my phone, a 1amp pantech charger, a ONN 1.2amp charger and a 1.5amp off brand charger. Also how long should this battery take to charge?
2. I would like any tips or tricks to extend my battery life, my longest charge yet has lasted 26 hours of heavy use (im also running Juice Defender Ultimate) and I keep seeing people talking about getting 3-3 and a half days out of one charge.
3. Is there anyway to make my built in battery meter more accurate it doesnt seem to be reading this battery properly
On a side note, I accidently deep discharged my EB40 when i was running the initial charge out, and it was plugged and unplugged several times trying to get the phone to power back on, Im wondering if i damaged my battery and if so is there a way to fix it?
Sorry for the extremely long question any help would be greatly appreciated.

Wolfeman781992 said:
Ok I have a Motorola Atrix HD running Cyanogenmod 10.1.3 and using the EB40 battery.
1. I would like to know what charger I should be using, I have the 850mA motorola charger that came with my phone, a 1amp pantech charger, a ONN 1.2amp charger and a 1.5amp off brand charger. Also how long should this battery take to charge?
2. I would like any tips or tricks to extend my battery life, my longest charge yet has lasted 26 hours of heavy use (im also running Juice Defender Ultimate) and I keep seeing people talking about getting 3-3 and a half days out of one charge.
3. Is there anyway to make my built in battery meter more accurate it doesnt seem to be reading this battery properly
On a side note, I accidently deep discharged my EB40 when i was running the initial charge out, and it was plugged and unplugged several times trying to get the phone to power back on, Im wondering if i damaged my battery and if so is there a way to fix it?
Sorry for the extremely long question any help would be greatly appreciated.
Click to expand...
Click to collapse
1. AHD could only pull 1A max. Beside good charger, you also need a good usb cable so that the power does not lost in transit. Install CurrentWidget to check how much power does your phone get while charging.
2. Minimum screen brightness, auto on/off data connection (LeanData app), undervolting? Battery consumption differs from phone to phone depending on how you use the phone, how good is your telco signal etc.
3. Perhaps you need to flash another rom? I'm on CM11 KitKat and the reading is fine. But battery life is not as good as stock JellyBean rom.
4. If your phone is dead after fully discharge, just leave it plugged in. after a while it will come to life.

pijes said:
1. AHD could only pull 1A max. Beside good charger, you also need a good usb cable so that the power does not lost in transit. Install CurrentWidget to check how much power does your phone get while charging.
2. Minimum screen brightness, auto on/off data connection (LeanData app), undervolting? Battery consumption differs from phone to phone depending on how you use the phone, how good is your telco signal etc.
3. Perhaps you need to flash another rom? I'm on CM11 KitKat and the reading is fine. But battery life is not as good as stock JellyBean rom.
4. If your phone is dead after fully discharge, just leave it plugged in. after a while it will come to life.
Click to expand...
Click to collapse
1.So the cable that came with the 1A pantech charger would be fine? what are the effects of using a small or larger charger? say the factory .85A? longer charge times?
2. Juice defender controls my screen brightness at roughly 40% normally (I have good eyes) data shuts off with screen unless traffic exceeds 100kb/s, undervolting? lots of social networking and texting, music player (rocket player), and a playing a power hungry game, 1-3 bars at home depending on were i put my phone, 4-5 bars else were
3. Is that stable or nightly? I only run stable roms due to my phone being my only source of internet and i have no back up phone
4. Good to know thanks :laugh:

Also on a 1A charger with quality cable CurrentWidget should be showing 1A(or 1000mA)? and were CurrentWidget shows battery current draw what is considered high?
sorry for all the question im kind of a noob to modding my phone i ran cyanogen mod on my OG Droid but never did any real modding on it phone ran faster and battery life actually increased, same on my AHD my battery life increased after flashing to cyanogenmod 10.1.3 i gained approx 3 hours over stock jellybean

pijes said:
1. AHD could only pull 1A max. Beside good charger, you also need a good usb cable so that the power does not lost in transit. Install CurrentWidget to check how much power does your phone get while charging.
2. Minimum screen brightness, auto on/off data connection (LeanData app), undervolting? Battery consumption differs from phone to phone depending on how you use the phone, how good is your telco signal etc.
3. Perhaps you need to flash another rom? I'm on CM11 KitKat and the reading is fine. But battery life is not as good as stock JellyBean rom.
4. If your phone is dead after fully discharge, just leave it plugged in. after a while it will come to life.
Click to expand...
Click to collapse
Wow that LeanData app is amazing, It's a shame that can't get the EB40 battery because It couldn't ship to my country so I need to live with the EB20 one.

Juice Defender Ultimate controls Data on/off Sync Screen brightness and timeout sound profiles based on schedules, bluetooth and cpu governer and clock speed if your rooted theres also controls for gps and wifi but i never uses those, i paid like $7 for it but i think it was well worth it on EB20 and stock jellybean i was averaging 10-11 hours of heavy use which was way better than my out the box 6-7 when i flashed to cyanogenmod and ran that with juice defender it increased to 13-16 hours, after adding the EB40 battery my shortest charge has been 18.5 hours, i was realy hoping to hit the 30 hour mark with all the people talking about going 3 and a half days on 1 charge

Wolfeman781992 said:
1.So the cable that came with the 1A pantech charger would be fine? what are the effects of using a small or larger charger? say the factory .85A? longer charge times?
2. Juice defender controls my screen brightness at roughly 40% normally (I have good eyes) data shuts off with screen unless traffic exceeds 100kb/s, undervolting? lots of social networking and texting, music player (rocket player), and a playing a power hungry game, 1-3 bars at home depending on were i put my phone, 4-5 bars else were
3. Is that stable or nightly? I only run stable roms due to my phone being my only source of internet and i have no back up phone
4. Good to know thanks :laugh:
Click to expand...
Click to collapse
1. EB40 is rated at 3200mAh (miliamp per hour). so in theory, a 1A charger will take 3.2 hours to fully charge it. a 2.1A charger will still take 3.2 hours. 0.85A charger will definitely take longer time. do correct me on this. and btw, AHD has the qualcomm quick charging feature built in. I'm guessing 3-4 hours to fully charge this phone from 0-100%.
2. Keep using JD if it already improves the battery life. when the phone gets 1-3 bars or in a place with low signal coverage, it will draw more power to get the coverage.
3. I think most KitKat rom based on the latest CM11 release are quite stable. you can read about them in the development threads.

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!

Question Battery questions

How do you guys go about your battery usage, as far as charging? Do you let it drain down before charging it? I have a wireless charging pad on my work desk, so I just place the phone on it while working. But this doesn't allow it to ever drain very low. I know in the past, there was a believe in certain battery conditioning, but I'm not sure if that still applies these days.

ledvedder said:
How do you guys go about your battery usage, as far as charging? Do you let it drain down before charging it? I have a wireless charging pad on my work desk, so I just place the phone on it while working. But this doesn't allow it to ever drain very low. I know in the past, there was a believe in certain battery conditioning, but I'm not sure if that still applies these days.
Click to expand...
Click to collapse
I always charge my phone between 40 and 84%. I don't let the battery go below 20% and above 84%; there're loads of research supporting this as this extends battery health (wear) rather than 0-100-0. Wireless charging is absolutely in efficient as it generates heat which is bad for the battery and a substantial portion of the charge transfer is lost in heat. The only good part of wireless charging is it's ease of use.
You don't need to do any battery conditioning as your battery doesn't have any memory as they used to long ago...

Charge limiting while doing Android Auto

I wanted to address this a long time. Everyone knows prolonged charging raises battery temperature and damages the internal structure of the battery in the long run, which is what Android Auto does on long trips.
If anyone wants to protect their phones, they should use a Chargie device, since it limits phone charging like nothing else (it's an external device) to a level that you set and also lets Android Auto data pass through while it's not charging.
Disclosure: we have developed Chargie and you can get it at https://chargie.org.

ovisoftblue said:
Everyone knows prolonged charging raises battery temperature and damages the internal structure of the battery in the long run, which is what Android Auto does on long trips.
Click to expand...
Click to collapse
Everyone knows that Android limits charging based on battery temperature and state-of-charge. And, for the USB Standard-A ports used on the vast majority of AA connections, the USB battery charging spec also limits the maximum rate to 1500 mA.

Question Pixel 7 not charging all the way up

my new pixel 7 does not charge all the way up during the night, it usually stops at 40-50%
I'm using a 5v 2A charger and high quality cable (already tried swapping them ).
Do you think it could be an hardware default ?

Power if off and charge.
If it still shows 50% charge return it.
Not acceptable, especially if the actual SOT reflects that.

Nytronx said:
my new pixel 7 does not charge all the way up during the night, it usually stops at 40-50%
I'm using a 5v 2A charger and high quality cable (already tried swapping them ).
Do you think it could be an hardware default ?
Click to expand...
Click to collapse
Did you try turning off adaptive charging?

hi
turn off the adaptive charging

I would return it immediately before you pass the window. I wanted to return mine for fingerprint reader issues, but I waited too long and now my only option is to swap it for a refurb device which is less than ideal.

Thats a good thing. Charging the battery to 100% stresses the battery, as does completely discharging it and reduces the longevity of the battery. I have mine set by ACCA to only charge to 90% and turn off at 5%.

gorilla p said:
Thats a good thing. Charging the battery to 100% stresses the battery, as does completely discharging it and reduces the longevity of the battery. I have mine set by ACCA to only charge to 90% and turn off at 5%.
Click to expand...
Click to collapse
Bump that low to at least 20% especially if you fast charge. It's the higher current load/temperature at the first 20% that causes the stress. It's important the battery is at least 72F at charge start, preferably 82-90F to avoid Li plating which will permanently degrade the cell if it occurs.
I aim for 40-80% usage range. That said on this heavily used device I expect about a 1.5 year battery life. Replacing batteries is just part of routine maintenance, no big deal.
While I always fast charge however I do midrange power cycling, what Li's prefer; it's less stressful. I'll frequently do 20% amounts too. What's convenient for me at the time. Rarely go above 90% as it's rather pointless and disproportionally increases charging time vs usage time.

Yeah, my current setup isnt perfect, but it avoids the extreme stresses while still offering me a charge for a full day.
However, my phones have only ever seen a 5% shutdown on a few occasions so there is no need to set a hard cutoff at 20%. It rarely gets that low and if it does, its because I cant charge it.
Typically I charge it in the car on way home from work, then when I go to bed. So the cycle throughout the day still is pretty ideal.
90->40%->65%->40%->90%

gorilla p said:
Yeah, my current setup isnt perfect, but it avoids the extreme stresses while still offering me a charge for a full day.
However, my phones have only ever seen a 5% shutdown on a few occasions so there is no need to set a hard cutoff at 20%. It rarely gets that low and if it does, its because I cant charge it.
Typically I charge it in the car on way home from work, then when I go to bed. So the cycle throughout the day still is pretty ideal.
90->40%->65%->40%->90%
Click to expand...
Click to collapse
If you resign yourself to changing out the battery when it's degraded (80% of its original capacity) it's not a big deal.
A battery failure is a big deal though; one I had came close to damaging the display on my N10+. That battery was degraded, lasted less then 1.5 years. I got lucky that time... not going to push my luck again especially over a cheap repair like a battery replacement.