Related
Just wanted to open up a thread here to see what we can do about battery calibration issues.
Not sure, but I read around that people are getting phone shut downs at the 10%-15% ranges.
When in actual fact it should be somewhere around the 1%-5% range?
Was wondering if there is some possibility in coding the phone to read the battery state better? Thus, eliminating the need for calibrating the battery through tradition means (ie: wiping, charging, etc)
Thoughts?
EDITS:
We've managed to figure out huge boundaries for the battery.
There are currently two ways to get your battery into "learn mode" - which will adjust the values of your battery to accurately reflect it's "age" and mAh tracking. This will lead to a fix for those of you who are currently facing issues with the battery shutting down anytime before the 1% mark.
1st fix:
1) Drain battery
2) Just as the battery hits "Shutting Down", plug in your charger
3) Let the phone power down
4) DO NOT TURN ON THE PHONE
5) Let it charge up overnight or something along the lines of 4-6 hours, which should ensure it will be fully charged
6) Power up, your phone should be calibrated and will now shut off at 1%
2nd fix:
Head over to the Battery Calibration Tool Thread which spawned off from the discussions here!
>> http://forum.xda-developers.com/showthread.php?t=765609
For those who have been following the thread and wonder what your status_reg value mean theloginwithnoname has kindly provided us with some datasheets and translations, which you can get with the following links:
Binary Conversion: http://forum.xda-developers.com/showpost.php?p=8013370&postcount=548
Then refer to Page 25 of the following datasheet: http://datasheets.maxim-ic.com/en/ds/DS2784.pdf
OR you can try out mtw4991's method to get learn mode done with the battery app that's been created out of this brainstorm thread.
The link to his method is > http://forum.xda-developers.com/showpost.php?p=9583271&postcount=340
I began this thread in other to simply find a fix for our current battery % meter. Basically, users (myself included) were having a problem with inaccurate battery % readings. Some N1's would shut down above 1% and this would leave many guessing when the battery would give out.
Needless to say, here at XDA - we managed to find the fixes. ;-)
And of course, we decided to take it to the next level.
How can we now push more out of our batteries?
RogerPodacter and theloginwithnoname have been working endlessly learning and understanding the how the battery registry works and together with dvgrhl they're finalizing a battery mod app which will help the N1 cope with the "learn mode" and changes. So do thank them for the great work they've been pushing out with! =)
They've helped us hammer out all the core details concerning the battery understanding, values, binaries, and we're wading through the mess to push the limits on the batteries (short of blowing them up as usual of course).
Be patient if the app isn't ready yet. And if you're a n00b, please don't mess around with the registry values and such if you have absolutely no idea what you're doing.
No one is gonna give a rat's poopoo if you blow up your phone and set your house on fire and gremlins kidnap your toes.
Peace out.
This thread is and methodology has served its purpose and many of us from this thread have moved on over to the Battery Calibration TOOL thread. The methods still work, but so do the newer methods at the tool thread, which I personally find is much easier and better.
If you'd like to use the manual method, it'll still work.
For those more interested in the newer method and I encourage you to do so - head on over through this link > http://forum.xda-developers.com/showthread.php?t=765609
+1
It happened to me yesterday. I am playing with my phone and I needed to check an important address on Google Maps, so I was thinking "Oh great I still have 9% battery" and then all of a sudden BOOM. It powered off. I mean seriously WHY have those extra 9% if I am never going to use them. So In reality my phone battery is like 80%
100%-(first 10% which drain in like 5-6minutes) - 10% that I never use cause the phone shuts off = 80% BOOOOOOOOOOOOOOOOOO NOT COOL
happened to me on cm 5.0.7.1 about 7% battery
I guess this would be an appropriate time/place to ask this question. I had someone PM me asking how to calibrate their battery and I didn't know if I provided them with the correct response. What I've always done is let the battery drain ALL the way down until it dies~usually about 1% and then fully charge the phone while it is off. Then, let it die down once again on that charge and repeat the charging while the phone is off. Is that the correct way to calibrate the battery or am I taking unneccesary steps?
THATTON said:
I guess this would be an appropriate time/place to ask this question. I had someone PM me asking how to calibrate their battery and I didn't know if I provided them with the correct response. What I've always done is let the battery drain ALL the way down until it dies~usually about 1% and then fully charge the phone while it is off. Then, let it die down once again on that charge and repeat the charging while the phone is off. Is that the correct way to calibrate the battery or am I taking unneccesary steps?
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No idea as well honestly. I've never charged my phone while it's off... so that might be the issue...
But then again, my phone has often turned off at the 10% mark. So that's why I thought I'd get more input here on how we can actually find a way to calibrate our batteries or something.
i have two oem batteries and a dock..Everyday I completely drain the first and swap it out with a fully charged one off the dock and both batteries perform great and never shut down above 1% every single time. So the batteries are always completely drained and then have a slow no stress recharge, maybe this is why mine go to 1%?
chowlala said:
No idea as well honestly. I've never charged my phone while it's off... so that might be the issue...
But then again, my phone has often turned off at the 10% mark. So that's why I thought I'd get more input here on how we can actually find a way to calibrate our batteries or something.
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I notice that if I charge my phone while it is off and take it off about 20 minutes after the light turns green, the discharge rate is MUCH slower than if I charge it while the phone is on. Or, I will charge it while on, let it get to 100%, turn it off and continue to charge until the light turns green again. Either of those two ways give me the best results for battery life.
Doesn't the Li-on type of battery calibrate itself when charged from 0% (or the specified minimum) to 100%?
THATTON said:
I notice that if I charge my phone while it is off and take it off about 20 minutes after the light turns green, the discharge rate is MUCH slower than if I charge it while the phone is on. Or, I will charge it while on, let it get to 100%, turn it off and continue to charge until the light turns green again. Either of those two ways give me the best results for battery life.
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Hmm. Interesting thought. Guess letting it charge to 100 while its on is one thing, then turn it off so it maxes out before daily use. I'll try that tomorrow morning and see.
Stats have been recalibrated to pershoots kernels already. So tomorrow will be a good testing day.
LiOn batteries should NOT be drained completely. It is bad for them. You should simply charge to 100%, turn the phone off, let it continue to charge (you may be at 100% when in OS but not truly 100% to the battery) and then wipe battery stats.
hah2110 said:
LiOn batteries should NOT be drained completely. It is bad for them. You should simply charge to 100%, turn the phone off, let it continue to charge (you may be at 100% when in OS but not truly 100% to the battery) and then wipe battery stats.
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Yeah, the discharge part is actually true. There's more info here bout the batts, but nothing much bout calibration.
http://forum.xda-developers.com/showthread.php?t=669497
chowlala said:
Hmm. Interesting thought. Guess letting it charge to 100 while its on is one thing, then turn it off so it maxes out before daily use. I'll try that tomorrow morning and see.
Stats have been recalibrated to pershoots kernels already. So tomorrow will be a good testing day.
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The biggest thing I noticed right off the bat in doing this was that normally my battery drains from 100% to 90% in less than 30 minutes. After doing what I suggested, I see that my battery discharges much slower from 100% to 90%! Hope it works for you.
My phone was doing that ALL the time. Here's what i did that fixed the issue for me.
1.) Let my phone die as usual.
2.) KEPT IT DEAD... for 1 day
3.) Charged with the phone OFF for 1 day.
4.) Went to RA's recovery as soon as i turned the phone on and reset Battery Settings.
5.) Rebooted and all is well.
I hope this helps someone else.
(My phone would die at 13% EVERY time. It got really annoying when trying to Navigate when i forgot my USB cord for my PowerCup. :< )
And yes i know about the whole not letting Lion Batteries die. When i worked for T-Mobile and the customers would bring in their N1's doing this, every call to HTC this is what they told me to do. (Minus the whole awesome recovery and such). They said letting the battery drain will not hurt the phone as long as it regains 100% charge after the initial drain.
AGAIN. This worked for Me. So im not promising you anything. Plus the batteries are only 25 bucks from Google. And i have 4 extras... Just in case. I would invest in some if i were you. Cause lord knows, were going to do some SERIOUS stuff to our phones. Extra Batts dont hurt.
Lithium batteries don't have memories, that's a leftover idea from the old Nickel Cadmium (NiCad) and NiMh (Nickel Metal-Hydride) days. The idea with Lithium (Ion & Polymer) should pretty much just be charged up whenever. Letting them be drained completely isn't good for them and will reduce their lifespan (reduced mAh) although it won't almost immediately kill them ala lead-acids. Overcharging them via a circuit with a poor cutoff also isn't good for them as they'll heat up, phones or any decent AC charger should stop charging when they hit 100% though.
Probably about the best you can do is charge it to 100%, pull the battery and reboot the phone and then reboot it again. The charge calculation will be based on the rated mAh of the battery which depending on the quality of the battery and the charging system of the device could end up giving you some funny figures. Not much you can do about it though.
I just wanted to say that this link does mention a proper calibration charge, it just does not go into detail.
Item 3 of "General Lithium-Ion Battery (LIBs)Usage":
• Although it is said that LIBs do not have memory, it's not entirely true. LIBs have gauges that monitor performance of cells, and if you do a lot of small charges, it won't let those gauges to monitor a full battery potential, causing an invalid indication of charge level. A complete charge/discharge should be made when battery capacity seems reduced, that will calibrate gauges and they will provide your phone with correct charge level status. A full charge/discharge cycle should be done every 30 (or so) partial charges.
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My assumption of a complete charge/discharge cycle would be:
1. drain battery until the device dies
2. charge the battery to 100%
3. power device on
4. drain battery fully until device dies (no small charges!)
5. charge battery to 100%
This should allow the battery gauges to recalibrate and improve battery capacity.
People seem to be in the dark about lithium ion batteries, how they are charged, and how the device estimates battery charge remaining.
Lithium batteries do not have memory effects, but the phone does keep a file with charge info about the battery; it uses this to estimate charge left and how to charge safely when the device is powered on.
When properly charging a Li-ion battery, the last 10% of the charge should take almost as long as the time it takes to charge from 0 to 90% (well about half as long meaning a full third of the charging time should be going into the last 10% of the charge) Charging with the device off, charges the battery more completely and consistently.
Li-ion battery chargers use a type of charge cycle called constant amp/constant voltage. The battery will be force fed amps until the battery's voltage peaks and it will then be fed a constant voltage. (around the 90% charge mark) During the constant voltage phase, the amps that the battery is taking in will be monitored; as the battery gets closer to full charge the amperage will drop more and more, until it is just a tiny trickle. When it gets to that point, the battery is fully charged. Obviously charging with the device still powered on creates a problem for that type of charging. So the battery can only be charged to the peak voltage, then the charge cycle must stop; as the last 10-15% of the charge can not be completed safely.
It is always good to let a device run until dead and then charge with the device off a couple times when the device is new, and then charge the device from empty while powered off once every couple months. (do not do it too often, as Li-ion batteries prefer to be between 50-80% charge for longer service life) This allows the device to maintain a proper reference data file on the battery and its charge state. this data file is what Android uses to estimate the charge in the battery, if the file is not accurate, the device may power down sooner than it should, or not charge fully to a true 100% state. (peak voltage state when powered on that is)
Also, Li-ion batteries are rated for capacity from a discharged voltage of 3v. So a 1500Mah battery is rated to provide 1500mah of power from fully charged to a final discharged voltage of 3v.
I do not know what the minimum operating voltage of various devices is, but if it is higher than 3v; then the phone must shut down at its min operating voltage and not the 3v needed to get full capacity. My Nexus one shuts off around 3.5v so there is around 25% of the actual rated battery capacity left. (remember what I said about Li-ion batteries liking to be between 50-80%, this left over capacity means that running the battery dead repeatedly is less harmful than if you drained the battery to a true 0% state)
There is also a voltage drop on a battery when under load. So if you are putting a heavy load on the device (like a 3D rendered game heavy gps use) then the battery voltage may drop to below the device’s min voltage. This means that if the phone shuts down during this time, you could probably turn it back on and get a few hours of standby or a few more minutes of light use. This could be another cause for people seeing shut downs when the battery gets around 10%.
The amount of power in a battery is high, especially in Li-ion batteries with their high energy densities. Over charging a Li-ion battery can cause an explosion, literally, that little battery in your phone could remove some fingers. Over discharging is bad as well, as it can start a fire; though like I mentioned above, the cut off voltage is above the 0% state, so that is unlikely here.
Ive proposed this before and got a bit shouted down, but thumbs up if anyone comes up with anything
As i see it, its not a problem with the battery. Its a problem with the battery meter. Since following a regime of deleting my batterystats.bin file, i dont see that issue. Its the same on my g1 as it is on my n1.
This is what i do... when i charge my phone, i charge it until 100%. When it reaches that 100%, i use either use the terminal or root explorer to delete the batterystats.bin file. After which i immediately power off the phone. Now, when its powered off(and still attached to the usb charger) the light should be green. But usually its not! Sometimes it charges up to a full hour longer before it turns green! When it turns green, power the phone back up and enjoy tue extra kick of battery life. Its not actually gaining battery life, its just resetting tue battery meter in the phone. This could only be done with a rooted phone. Oh, i think that this whole innaccurate battery meter thing is a problem with android in general. The meter becomes innaccurate with time. Sometimes extremely innaccurate.
Using the terminal...
su(press enter)
rm /data/system/batterystats.bin(press enter)
Then power off
Wow. Lotsa pewpewz here. Haha.
Again, after all the discussions, seeing that most of us agree the N1 keeps "stock" of how the battery chargers, is there a way for us to check or see how the battery is being calibrated, etc?
Not so much an app to modify the calibration, cuz that'll just be too dangerous, but something more like a tool to monitor it, so we know if it's calibrated right or wrong.
Deleting the batterystats.bin file isnt an app. Its either a script you run to delete it or physically deleting it. And its not dangerous. Ive done it well over a thousand times with my g1 and n1 combined. If you wanted to find out how the calibration work, i guess you could make a copy of your batterstats.bin and read it
I havent gotten a new phone since 09 Hero.....whats the deal with battery charging. Do I need to fully charge the phone before using it? Do you drain the battery fully before re-charging it?
what give the battery the best life possible?
Never, ever, never, ever, never, never, ever drain a lithium based battery to nothing. Very, very bad. Charge it and keep it above 50% for the firstweek.
Swyped from my Atari 2600
overclockxp said:
Never, ever, never, ever, never, never, ever drain a lithium based battery to nothing. Very, very bad. Charge it and keep it above 50% for the firstweek.
Swyped from my Atari 2600
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Thank you. That is the type of advice I need.
kinextions said:
I havent gotten a new phone since 09 Hero.....whats the deal with battery charging. Do I need to fully charge the phone before using it? Do you drain the battery fully before re-charging it?
what give the battery the best life possible?
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Even your Hero should be the same. Most modern cell phones use Lithium Ion which do not have memory effect.
There is no memory for Li-ion batteries so go ahead and just use your phone. You do not have to keep it above or below a certain charge. The phone will not allow the battery to drain to completion so you do not have to worry about that. It is very bad to let a Li-ion battery completely drain but there are fail safe measures implemented in the phone/battery to prevent that. 0% charge on your phone does not mean 0% battery, its just the mA at which your phone thinks the battery has 0% battery remaining.
I wonder if there's going to be a similar procedure to the OG EVO's plug, unplug, turn off, charge, unplug, turn on, turn off, charge method (or whatever it was) to maximize battery life.
mevensen said:
I wonder if there's going to be a similar procedure to the OG EVO's plug, unplug, turn off, charge, unplug, turn on, turn off, charge method (or whatever it was) to maximize battery life.
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Bump charging works for lots of phones to my understanding. Something about how the phone at first doesn't charge to 100% - when it gets to a certain point it just keeps it maintained at that level .
While it is true that lithium ion batteries don’t suffer from “memory” problems such as NiCad batteries they do have a lifespan. For example, the lithium battery in the laptop that I am using right now, and have used for the past year, currently has a 98% charge and is not charging. That’s much, much better than a NiCad battery would be. I can really see the NiCad issue in my rechargeable cordless tools.
But lithium batteries will eventually die. Just ask the first generation iPud owners. Their batteries were failing just after a year of ownership and Apphole wouldn’t do anything about it. They had reached the end of life of their batteries.
Lithium batteries do take a little bit to break in though. You’ll notice a slight improvement as time goes on for the next month. But I would still refrain from draining the battery too much.
Thanks for the input...I too have the hero, and was curios...
...is it Friday yet?
there was a recent article I seen from a link in the g2x forums where they go to actual experts on the lithium who designed the actual cells and ask them how is best to charge them.
the honest answer is for life being your most concern. that means for the battery to keep a consistent charge over the life of the phone without losing actual daily life on the battery,
you have to plug it in when the phone ask at about 20%. then unplug it when the phone says the battery is full. Do not leave the battery plugged in for hours over full. said something about the charge disburst weird or something
anyway it was a link in the g2x forum in general. im sure you can finds it. Ill look if you really want me to,
Lots of info on Li-ion batteries:
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
Being that the Battery stats are stored on the /Data partition, how is this minimum threshold managed?
Hi all,
I'm rooted, S-Off and on Honeycomb with the revolutionary method with CWM and all is working great and has been for over a month now.
I'm just worried regarding the battery. I've seen snippets of info that if the battery fully discharges, i'm screwed.
can anyone please confirm that it is either OK or NOT OK to let the battery run down on the Flyer?
thanks,
Yes, if Li-ion batteries are actually drained to zero voltage, they are useless. However, technically, there are safety measures both in the battery itself (safety circuit) and the device that protect the battery from complete discharge. The device will tell you that zero battery is left, and shutdown. So in most instances, you are protected.
HOWEVER, I have seen plenty of cases on Android devices (and older phones, such as Windows Mobile) where the safety measures don't always kick in properly. People will let there phone/device drain until it shuts off, then they can't get it recharged. In these cases, the voltage is still not actually zero. But if the voltage is below a certain threshold, it won't take a charge from the normal charger. Only way to bring these batteries back, is a special battery meter with a boost function. Or replace the battery. As most of us don't have access to such a meter (and might not help anyway, since the battery is not designed to be removable) you're pretty well screwed.
This doesn't happen often. But if it happens to you, yes you are screwed.
Another thing about full discharge cycles on a Li-ion battery, is that it will shorten the life of the battery in the long term.
Moral of the story, is don't drain the battery to zero intentionally or often. Some people do it to calibrate the battery meter. This is worthless, as the battery meter on phones and tablets are not accurate enough to justify running the battery until the device shuts down. Just drain to 10 or even 20%, recharge to full (leave it there a while) and repeat a couple times, if you want to calibrate the battery meter.
As for normal usage, avoid draining the battery until shutdown. Its fine if it happens accidentally once in a while, we've all done it. But don't let it happen frequently.
My old phone's (Xperia S) battery drains very fast (can't last for a day) after 2 years of use. When it was new it lasted about one and a half day. I charged it every day for 2 years and the battery became weaker. I don't want this to happen with my Z2. I use dock for charging my Z2. USB cable or dock is better for the battery? And when should I charge it? wait while the battery drains full or charge it every day and don't let it drain, just about half, or don't charge it full and get it drained every day. And how long should I charge it? just that time while it charge full or leave it charging for longer (a whole night, about 10h)
someone please
I dont think it has anything to do with the way you are using to charge your phone... It's just natural for the battery to need to be replaced after a couple of years as far as i know
As far as I'm aware, after about 500 charge cycles the battery stops charging to full capacity (although it says it is). So the battery quality degrades over time regardless.
the battery of the Z2 is hardly affected by how you charge or how many times its charged
itll start degrading over time
it should be a Li-ion battery (referencing the packaging instructions for Z2)
Envious_Data said:
the battery of the Z2 is hardly affected by how you charge or how many times its charged
itll start degrading over time
it should be a Li-ion battery (referencing the packaging instructions for Z2)
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yeah, I know that it's affected by how do I charge how many times, but I wanna know that what's the best for the battery
maddboss said:
yeah, I know that it's affected by how do I charge how many times, but I wanna know that what's the best for the battery
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Click to collapse
just charge normaly,
somehow i get the best life out of charging randomly, e.g. never 0>100% or simular but instead 20 to 60% increments gives me the best total life
in terms of wear, cant do anything with a Li-ion battery as far as i know
ok, better charge it when it gets as low as 30% and better not fully charge it, but 85-90% will be great for long term life. and never let it connected if it happened to reach 100%, also better keep it somewhere cold and definitely not under sunlight
It is said to live longer if you charge it from 50 to 90%.
That said, if you charge it from 0 to 100% every 2 days, or charge it from 50 to 90% ever day.... well... the end result is the same... it doesn't matter at all.
The battery already has safety over/undervoltage protection, therfore charching it as you like doesn't change much at all. You will see that a phone left at 100% in the charger will drop to 97-95% before it starts charging again.
i think the battery in the Z2 was said to handle about 600 cycles with less than 10% Battery degration.
if you charge it every 2 days thats about 3.5 years.
There is a lot of false information floating in this thread.(and lol Z2 deals with all, 10/10 loyalty) I was actually replying to this but I wanted a bigger audience to take better care of their battery, so check my thread out : http://forum.xda-developers.com/showpost.php?p=60299964&postcount=1
This is app is a must have and thought I'd share. Like everywhere I have read, they say battery should not be charged to 100%, it will hurt the battery somehow. This app "Battery Charge Limit" automatically (with root) stops charging the phone at whatever percent you want and starts charging back up at whatever percent you want. So you can always stop before it hits 100. It can be used without root but it only notifies you and you have to manually unplug the phone to stop charging. Better with root since its automatic.
https://play.google.com/store/apps/details?id=com.slash.batterychargelimit
Ndaoud360 said:
it will hurt the battery somehow.
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Don't charge to 100%
Slow charge only
Don't quick charge
Don't use wireless charger because it heats up the battery
Lower brightness to 10% for best battery life
Disable wifi/lte/nfc/bluetooth for best battery life
...
Enjoy your $1000 phone!
peachpuff said:
Don't charge to 100%
Slow charge only
Don't quick charge
Don't use wireless charger because it heats up the battery
Lower brightness to 10% for best battery life
Disable wifi/lte/nfc/bluetooth for best battery life
...
Enjoy your $1000 phone!
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Keep it turned off for a better batter longevity ??
Damn thos people are more preocupied of how to prevent the battery wear than actually enjoying this amazing phone
Well coming from an HTC device where after like what 6 months, my battery starts dying much quicker and hopefully this app and the nature of Samsung makes my phone battery last longer. Never owned a Samsung, so I don't know how the battery lasts over time.
This is a myth, modern phones already prevent damage from overcharging with the charge controller in the phone. Fast charging and slow charging also does not make a difference in battery longevity.
Just use your phone like a phone.
Yeah no
@nukeclears you need to bone up a bit more on battery chemistry before making statements like this. Overcharging is very different from charging to 80%. That's why Apple just implemented a charge limit in ios13 and Tesla strongly recommend charging to 80/90% max for daily use. Samsung just don't want to do this because they haven't felt enough pressure. I'll bet they implement it on the S11 and then for all phones by the end of the year.
Tab S4 has a setting to stop charging at 80%
You guys do need to go through all this? For what?
I have a Note 3 with battery since 2014 or 15, it still gives me the same power, sometimes it's better than it first was.
Charging fast/slow doesn't affect anything, I'm doing so for years.
I really don't think batteries die, if you felt it's weakening, just change OS, not the battery.
Samsung themselves, on the s10 series, suggest to charge from 30% to 80% everytime you need a charge.
In my daily usage, stopping charge to 90% is enough and I have all the juice i need till the next day.
If you are rooted, Battery Charge Limit app can be very useful to optimize the life of your battery (remember: battery is the first hardware component that ages your phone). On my 2015's Sony phone, they wanted me to pay 75 euros for battery replacement...
This thread is full of people who know nothing of batteries.
I bet your phone battery does "feel" the same after years when your os pushed that update that permanently limited your frequencys lmao.
peachpuff said:
Don't charge to 100%
Slow charge only
Don't quick charge
Don't use wireless charger because it heats up the battery
Lower brightness to 10% for best battery life
Disable wifi/lte/nfc/bluetooth for best battery life
...
Enjoy your $1000 phone!
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Click to collapse
Enjoy replacing it every year because phone batteries are becoming more commonly HARD GLUED into place. So go ahead, switch the whole phone out.