Database Develop

Charge Limiting to Extend Battery Life

Limiting the battery charge to a fraction (70%-80%) of it's full capacity is a well known way to greatly extend the battery's charge capacity lifetime. There are several (root) apps created to automate this, that stop the phone from charging once a selected charge level is reached. Battery Charge Limit is one (https://forum.xda-developers.com/android/apps-games/root-battery-charge-limit-t3557002), ACCA is another (https://github.com/MatteCarra/AccA/). So far I have not been successful getting either of those to work with the ROG2. I was wondering if anybody has had any success with those apps or any other way to limit the battery charge on the ROG2?

The Rog phone 2 has its own function that lets you automatically stop charging.
But keep in mind this function is only useful if you are planing to keep the phone connected to a charger 24/7 then it's useful. Otherwise it's worthless if you disconnect your phone once it's 100% charged.
Battery also needs to discharge and recharge to keep it's capacity and function going. If you don't do this it can wear the battery out even if you stop charging at 70-80%.

Jake.S said:
The Rog phone 2 has its own function that lets you automatically stop charging.
But keep in mind this function is only useful if you are planing to keep the phone connected to a charger 24/7 then it's useful. Otherwise it's worthless if you disconnect your phone once it's 100% charged.
Battery also needs to discharge and recharge to keep it's capacity and function going. If you don't do this it can wear the battery out even if you stop charging at 70-80%.
Click to expand...
Click to collapse
Most of what you said is wrong.
The ASUS Power Master Battery Care feature slows and delays the charging but still charges to 100%. The feature is only useful if you have a regular charge schedule (which I don't, and DO mostly leave the phone on the charger) and even then, it's still charging to 100%. Repeatably charging a LiPo battery to 100% WILL decrease it's capacity significantly faster than if only partially charged. All phones already slow charging at high charge levels. There is no advantage to discharging the battery.
Read and learn: https://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
If you can reference any authority to support your position, I'd love to see it.

MyronAz said:
Most of what you said is wrong.
The ASUS Power Master Battery Care feature slows and delays the charging but still charges to 100%. The feature is only useful if you have a regular charge schedule (which I don't, and DO mostly leave the phone on the charger) and even then, it's still charging to 100%. Repeatably charging a LiPo battery to 100% WILL decrease it's capacity significantly faster than if only partially charged. All phones already slow charging at high charge levels. There is no advantage to discharging the battery.
Read and learn: https://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
If you can reference any authority to support your position, I'd love to see it.
Click to expand...
Click to collapse
Did you ever know that even authority can be wrong in facts as well? I can confirm that battery feels alot better with discharge and charge than what it is with 100% all time or 70-80%.
How I can confirm is that I have a Microsoft surface Pro 4 and when I kept it on charger at 100% for a day or two the wear level jumped from 0% to 3% but when I discharged it and recharged it after some time then tear level on battery went back to 0% and capacity was back to its full capacity again. So discharge and recharge does not always wear the battery out. It actually makes battery feel better too.
So please don't always believe what internet and what authority States. Since on internet there is alot of false facts and authority gives alot of nonsense facts alot of times too.

Is it really wise to basically degrade your battery by 20% out of the box just so you can have 95% in 2 years? If anything, heat is the greatest factor for degradation. If you're that worried, just use a 2 Amp charger.

dennis96411 said:
Is it really wise to basically degrade your battery by 20% out of the box just so you can have 95% in 2 years? If anything, heat is the greatest factor for degradation. If you're that worried, just use a 2 Amp charger.
Click to expand...
Click to collapse
Wise? Absolutely. Is it the perfect solution for everyone? No

dennis96411 said:
Is it really wise to basically degrade your battery by 20% out of the box just so you can have 95% in 2 years? If anything, heat is the greatest factor for degradation. If you're that worried, just use a 2 Amp charger.
Click to expand...
Click to collapse
Yes, heat is a factor, but keeping the battery at 100% will degrade the battery faster regardless. If you simply do not need the additional 20% than there is no advantage to charging to 100%. My usage scenario is that the phone is plugged in a lot of the time and I very rarely need the full battery capacity. I've had several phone batteries bloat up under this scenario (and not using any fast charging).
When batteries degrade they don't stop at 80%. They generally keep degrading fairly rapidly. And you don't just lose capacity, as the battery degrades the internal resistance increases, which results in throttling and/or crashing.
BTW on some phones, ACCA will stop charging the battery when it reaches the desired charge level and run the phone entirely from external power.

willhemmens said:
Wise? Absolutely. Is it the perfect solution for everyone? No
Click to expand...
Click to collapse
Agreed. If manufacturers still offered replaceable batteries in their flagships, this would be somewhat of a moot point. When dealing with a sealed battery that is expensive and time consuming to replace, it's wise to do everything reasonable to protect the overall lifespan of it.
As for keeping it charged at 100%, I did that once and killed a battery in about 6 months. Not doing that one again.

Guys, it's so nice you are debating over the battery charging metaphysics but it does not help us solve the issue: our rooted phone can not be charged in a smart way using magisk+acc, ACCA or Battery Charge Limit.
Any ideas?

I'm facing issue with my Rog 2, my phone is not charging fast
1. I'm using 18w charger come with the phone to charge
2. I have used Xiaomi 2i power bank with 18w output to charge my phone (still not working)
3. I restart the phone on charging it goes down 36% to 29%
4. On charging when i restart the phone it goes 8% to 13%
5. I'm facing this problem from the yesterday
6. Double plus sign on battery icon as well as fast charging text on home screen is also not showing while charging
What is the issue please help anyone

Submit a bug report to acca and maybe at least someone starts caring for the ROG Phone. The reason why it doesnt work is simply because ASUS does its own stupid thing while charging (thats what happens when 100 OEMs cook their own soup, a mess).
About the battery health:
A battery keeps its best health when its charged between 25-75%, is kept below 30°C and charged as slow as possible. Thats why its wise to stop charging at 80% with a slow charger, especially when you have a big battery anyway that lasts for a day with 80% charge.

Himan99 said:
I'm facing issue with my Rog 2, my phone is not charging fast
1. I'm using 18w charger come with the phone to charge
2. I have used Xiaomi 2i power bank with 18w output to charge my phone (still not working)
3. I restart the phone on charging it goes down 36% to 29%
4. On charging when i restart the phone it goes 8% to 13%
5. I'm facing this problem from the yesterday
6. Double plus sign on battery icon as well as fast charging text on home screen is also not showing while charging
What is the issue please help anyone
Click to expand...
Click to collapse
currently facing the same issue and this is the first time in 2 week time. though on the lock screen, it shows fast charging.. but it isnt working smh

apollo3x said:
currently facing the same issue and this is the first time in 2 week time. though on the lock screen, it shows fast charging.. but it isnt working smh
Click to expand...
Click to collapse
Change the cable and try also try with different fast charging adapters or fast charging powerbank(mi power bank)
My problem solve by changing the cable
---------- Post added at 03:55 AM ---------- Previous post was at 03:54 AM ----------
MyronAz said:
Limiting the battery charge to a fraction (70%-80%) of it's full capacity is a well known way to greatly extend the battery's charge capacity lifetime. There are several (root) apps created to automate this, that stop the phone from charging once a selected charge level is reached. Battery Charge Limit is one (https://forum.xda-developers.com/android/apps-games/root-battery-charge-limit-t3557002), ACCA is another (https://github.com/MatteCarra/AccA/). So far I have not been successful getting either of those to work with the ROG2. I was wondering if anybody has had any success with those apps or any other way to limit the battery charge on the ROG2?
Click to expand...
Click to collapse
Without root any chances
Because i don't want to root my phone

Himan99 said:
Without root any chances
Because i don't want to root my phone
Click to expand...
Click to collapse
There is no programmatic way to internally control the charging process without root, however there are some (not as good) alternatives.
First there is an app Accubattery that will give you a notification when the battery reaches a given level, you have to then disconnect the charger manually.
A second way to do this would be to use a smart plug and control it with Tasker. Don't know if anyone has done this but it should be possible.
Another possibility that is not vailable yet would be a kickstarter project called BatteryPal. This is a charging cable that had a bluetooth interface built in to it that would control charging using an app on the phone.They arr saying it will be available March 2020, but who knows.

I'm facing the same situation here. I'm next to a charger most of the time, so I like to use slow charging and not going above 80%. I was used to have battery charge limit installed in all my devices, but found this is not working with the rog phone.

My rog Phone 2 global edition over heats while charging

has anyone found a way even with root? I've tried ACC and some other app but they all done work.

I've also just tried ACC and Battery Charge Limit, but neither worked. It looks like there is something that keeps overwriting the charge control file all the time and allows the battery to charge anyway. Battery Care was disabled while doing this.
I am rooted, so I am able to test any potential solution.

Someone posted on r/rogphone2 a solution for this:
https://www.reddit.com/r/ROGphone2/comments/ev0put/hows_this_it_never_reaches_100/
I've just tested it and it works for me.

Does anyone know of a legit charging adapter that isnt fastcharge and doesnt damage the phone or gets damaged itself after a while? I want to charge my phone without fastcharge but cant find a good charger
My old htc m8 charger got damaged after just a few times of using! Seems like the phone drained it dry

Phone is hot while plugged in and @ 100%

While at work, I leave my phone plugged in and charged at all times.
I don't have exact temperatures but I've noticed that it is warm the whole time. Anyone else notice this?

blazinazn said:
While at work, I leave my phone plugged in and charged at all times.
I don't have exact temperatures but I've noticed that it is warm the whole time. Anyone else notice this?
Click to expand...
Click to collapse
Are you using the official charger?
Some aftermarket USB C cables can damage your phone or even fry it completely.
If you are using a standard charger, I'm more inclined to say your phone is getting warm because the battery has been charging. If you have hotspot on, that can warm your phone up quite alot too... Basically the more your phone is doing the hotter it can get (Bluetooth/wifi/hotspot etc)
FYI: charging to 80/90% will make your battery last alot longer too, if you plan on keeping it a few years. Charging to 100% is the fastest way to degrade your li-ion battery.
If you are rooted you can limit your charge to 90% but depends if you don't have access to a charger all day you might need that 100%.
Hope that helps.

Demolition49 said:
Are you using the official charger?
Some aftermarket USB C cables can damage your phone or even fry it completely.
If you are using a standard charger, I'm more inclined to say your phone is getting warm because the battery has been charging. If you have hotspot on, that can warm your phone up quite alot too... Basically the more your phone is doing the hotter it can get (Bluetooth/wifi/hotspot etc)
FYI: charging to 80/90% will make your battery last alot longer too, if you plan on keeping it a few years. Charging to 100% is the fastest way to degrade your li-ion battery.
If you are rooted you can limit your charge to 90% but depends if you don't have access to a charger all day you might need that 100%.
Hope that helps.
Click to expand...
Click to collapse
Yes, using the official charger. I also failed to mention that I have a case on my phone. Not sure if that is contributing to it.
Is it because charging to 100% counts as a full cycle? I will admit that I'm not up to snuff on battery tech and what the best way to preserve the battery long term. From my past understanding, if you take your battery all the way down and then charge it to 100%, then that was a full cycle. More cycles = degraded battery over time.
Not sure if this still holds true for li-ion batteries today.
Edit: My thought here is to leave it on the charger whenever I can, thus minimizing the cycles I put on the battery.

blazinazn said:
While at work, I leave my phone plugged in and charged at all times.
I don't have exact temperatures but I've noticed that it is warm the whole time. Anyone else notice this?
Click to expand...
Click to collapse
blazinazn said:
Yes, using the official charger. I also failed to mention that I have a case on my phone. Not sure if that is contributing to it.
Is it because charging to 100% counts as a full cycle? I will admit that I'm not up to snuff on battery tech and what the best way to preserve the battery long term. From my past understanding, if you take your battery all the way down and then charge it to 100%, then that was a full cycle. More cycles = degraded battery over time.
Not sure if this still holds true for li-ion batteries today.
Edit: My thought here is to leave it on the charger whenever I can, thus minimizing the cycles I put on the battery.
Click to expand...
Click to collapse
My suggestion is download accubattery, it will tell you your battery temperature and also it calculates the degredation and health of your battery. It will also explain how many cycles of wear you are adding to the phone.
Back in the old days with nickel cadimium batteries you needed to do the whole 0-100 thing, that was good for battery memory... But modern day lithium batteries actually are better being topped off and kept between 20-80% in an ideal world. So deep discharges and high % charges wear out your battery significantly faster... This is why electric cars often limit charge, by doing this they can extend the life of the battery cells quite dramatically.... but if you are upgrading yearly, don't worry about it.
Here is an article that will help you.
EDIT: try charging with and without the case and see if it gets hot, definitely cases can be an insulator. You can monitor temp in accubattery.
https://www.wired.co.uk/article/how-to-improve-battery-life-tips-myths-smartphones

The idea that there is a set number of charging cycles for a particular battery, and every time you charge the phone you use up one of those cycles regardless of how much it charges (ie a 10% charge and a 100% charge both use one charging cycle) isn't how modern cell phone batteries work.
As noted, it is best to not charge your phone to 100%, nor do you want to discharge your battery to 0%. It is best to charge it more frequently for a smaller amount of charge each time as well. So charging a phone 10% ten times is better for the better than charging the battery once for 100%.
Heat is also a huge problem with batteries and the hotter a battery gets, the shorter life expectancy it will have. So definitely look into the issue.
If rooted, there are a couple of Magisk modules that control charging. They usually will automatically pause charging if the battery gets too high of a temp. Once a preset time has passed, it will restore charging again. The idea being that the pause in charging will allow the battery temps to drop. You can also limit the battery max charge to another value other than 100% if you want. 80% max charge is suppose to be the sweet spot for battery longevity, but anything less than 100% is going to add life to your battery.

Just so you know the phone does not charge to 100% or allow you to discharge the battery completely. Your phone just shows that you are at 100% when charged as much as allowed and discharged as much as allowed when you reach 0% charge. The partial charge thing no longer has much of any effect since the phone is doing it for you already but the internet hasn't' caught up to that yet. These chargers do stop charging at full and your phone should not be warm if it's charged but unused. So... are you using while on the charger? That's not a great idea because it's going to kick it into charge over and over. The fellow above was correct about using proper cables, I'm not sure that's much of a problem anymore but there still may be some ringers on Amazon and elsewhere. You could also have something discharging the battery enough to get it to charge continuously or close enough to it to warm the phone up over time, a wake lock can do it for example. Those can keep the phone on charge enough to warm it up.
In general with charging it's going to be best to keep your charging and total cycles down because capacity loss during charging is a real issue due to physical deterioration and transfer of materials in the battery caused during the charge. You would be better served by allowing it to discharge at least somewhat and only charging as needed rather than keeping it plugged in. Since you're at work it should be fairly easy to plan your charging so that you'll be able to get through the day without the constant charge. Not saying wait until it dies and then charge, that would be inconvenient, just that you would get more life if you reduced your charge cycles.
No matter what your phone is getting warm something needs to be addressed if it's doing so when not used but plugged in. The charger should stop for long periods and the phone should be cool after the charge completes.

Smart Charge feature

Hi there,
to be honest, I have posted that question already in the P30 forum. But as both devices are quite similar and the Pro has a wider reach I decided to repeat it here. I hope you don't mind...
With the new EMUI10.1 also the "Smart Charge" feature arrived. Well, here at my P30 as a switch at least. I am really not sure, if this is working at all. I have it activated since idk 5 weeks or so and am using the original cable and charger. The charging curve, as can be seen in the battery settings, is not displaying any slower or even paused charging speed, the curve goes straight up until 100% ~1h after plugging in. Also there is nothing indicating an activated smart charging right when I plug in the charger.
What is your experience here, can you guys see any difference, have you seen any proof this is working?
Many thanks.

Yes, I've noticed it on both of my Huawei phones. It basically slows down or even stops charging so it doesnt max out, in order to preserve battery life. So you can leave it on the charger forever but it'll never hit 100%. My P30 pro sits on the charger almost daily and sits around 80-90%.

Maybe it has an algorithm that knows when you dont use it and charges to max then? My phone is on a wireless charger about 95% of the time throughout the day and night because it isnt used often. Sometimes it'll popup telling me that its using the smart charge feature and if I want to disable it blah blah.

adamlee2012 said:
I wake up every morning and mines on 100%. Looking at the battery graph it goes straight to 100% doesn't stop at 80 and charge nearer the time I unplug it so not quite sure how they've implemented it. Sony pauses charging til the usual time you unplug. Maybe when it reaches 100 on Huawei it stops charging.
Click to expand...
Click to collapse
That matches my experience. Also the Sony part.

Hi guys, I noticed that even if the smart charge is on and I always charge at 80% max, if I forget to unplug it it goes up to 100%. SO I suppose it is not working... What is your experience about it?

adamlee2012 said:
I think it charges to 100% then stops charging... And keeps it at 100%... I charge my phone every night... I never see it pause charging at 80% looking at the charging graph.
Click to expand...
Click to collapse
Thank you for your feedback! So it is not working as it should. I got it should "understand" your habits and charge it accordingly, never going over 80%.
It's a pity, I found it really useful, but if it works like this it is useless.

beggar23 said:
Hi there,
to be honest, I have posted that question already in the P30 forum. But as both devices are quite similar and the Pro has a wider reach I decided to repeat it here. I hope you don't mind...
With the new EMUI10.1 also the "Smart Charge" feature arrived. Well, here at my P30 as a switch at least. I am really not sure, if this is working at all. I have it activated since idk 5 weeks or so and am using the original cable and charger. The charging curve, as can be seen in the battery settings, is not displaying any slower or even paused charging speed, the curve goes straight up until 100% ~1h after plugging in. Also there is nothing indicating an activated smart charging right when I plug in the charger.
What is your experience here, can you guys see any difference, have you seen any proof this is working?
Many thanks.
Click to expand...
Click to collapse
According to the official, smartphones powered by lithium batteries ages differently, which results vary in terms of charging or simply called slow charging as well as short battery life.
For example, if a user leaves the charging overnight or for a long time. The charger keeps supplying the power to the battery, a state called overcharging. Repeating this process causes battery aging.
But with accurate management, the battery aging can be slow down and extend the battery life.
This is where Smart Charging Mode comes in place and uses the phone’s built-in AI capabilities to learn usage patterns. To slow down the battery to charge 100% when required.
For example, if the smart charging mode is enabled and the battery reaches 80%. The charging automatically slowdowns (charging rate) before it reaches 100%. This whole process prevents the phone to keep charging at 100 percent without harming the batter

P20pro here, same problem. Night or day, it seems to charge at the same rate, not waiting at 80%, no sign of that toggle doing anything.

skodann said:
According to the official, smartphones powered by lithium batteries ages differently, which results vary in terms of charging or simply called slow charging as well as short battery life.
For example, if a user leaves the charging overnight or for a long time. The charger keeps supplying the power to the battery, a state called overcharging. Repeating this process causes battery aging.
But with accurate management, the battery aging can be slow down and extend the battery life.
This is where Smart Charging Mode comes in place and uses the phone’s built-in AI capabilities to learn usage patterns. To slow down the battery to charge 100% when required.
For example, if the smart charging mode is enabled and the battery reaches 80%. The charging automatically slowdowns (charging rate) before it reaches 100%. This whole process prevents the phone to keep charging at 100 percent without harming the batter
Click to expand...
Click to collapse
I still cannot see any slowdown in charging here. How about you?
Sent from my [device_name] using XDA-Developers Legacy app

None... Charges as usual over night. Goes to 100% in about 1 hour and stays there

So basically it charges up to 80% in regular mode, after it starts to charge or very slowly or just before u wake up to 100%.. Yes, is learning at what time usually u touch for the first time the phone..
Or at least, this is what should do
Sent from my VOG-L09 using Tapatalk

duff91 said:
So basically it charges up to 80% in regular mode, after it starts to charge or very slowly or just before u wake up to 100%.. Yes, is learning at what time usually u touch for the first time the phone..
Or at least, this is what should do
Sent from my VOG-L09 using Tapatalk
Click to expand...
Click to collapse
Exactly, "should do". Instead the phone is charging quickly and straight to 100% without any slowdown.
Sent from my [device_name] using XDA-Developers Legacy app

Fast charging/super fast charging

I'm currently on Android 11, june patch. Just got the phone this week and noticed something very frustrating. I can generally "fast charging" as i only have a 15w charger for now. But sometimes if I unplug it and plug it back in, it just says "cable charging" i have other chargers and it's the same.. sometimes it says fast charging, but i downloaded Ampere and can see it only at 300mah and only goes up very slowly.. 1% every 4mins..
Anyone else with these issues?

Just try using the official charger and cable because everything else would be way dangerous. The same thing you have mentioned is happening to me as well. Try changing the way cable is plugged in. Turn it upside down.

Im using the 25w charger, Samsung original and neve chared with the stock 15w charger. It shows super fast charging, no problems here.

kevinwu128 said:
I'm currently on Android 11, june patch. Just got the phone this week and noticed something very frustrating. I can generally "fast charging" as i only have a 15w charger for now. But sometimes if I unplug it and plug it back in, it just says "cable charging" i have other chargers and it's the same.. sometimes it says fast charging, but i downloaded Ampere and can see it only at 300mah and only goes up very slowly.. 1% every 4mins..
Anyone else with these issues?
Click to expand...
Click to collapse
yeah def charge with Samsung OEM charger

Meh, fast charging only will engage with 25 watt brick that is compatible.
$15 for a Samsung 25wbrick/cable at Walmart online, what's not to like?
I have 2 sets, the first one is over 1.5 years old and still runs A-OK.
jeeeesze...

Yeah i plan to get the 25w charger, just waiting on delivery. I'm just trying to reduce buying so many as i have so many spares from old phone that charge in just over an hour SOMETIMES And over 3 hour at other times! Frustration is even if i unplug and plug it back it, it never seems to go to fast charging unless i let it discharge a little. Winter here and it's cold so temperature of battery has been fine.

kevinwu128 said:
Yeah i plan to get the 25w charger, just waiting on delivery. I'm just trying to reduce buying so many as i have so many spares from old phone that charge in just over an hour SOMETIMES And over 3 hour at other times! Frustration is even if i unplug and plug it back it, it never seems to go to fast charging unless i let it discharge a little. Winter here and it's cold so temperature of battery has been fine.
Click to expand...
Click to collapse
Temperature matters. Charging is an electrochemical reaction. Too low a temperature and fast charging will not engage. Charging below 72-82F can cause Li plating to form which will permanently degrade the cell.
Never attempt to charge a Li at 40F or less!
Best battery start temperature is 85-95F
Li's fast charge best in the 90's.
Below 60F fast charging may not engage and it will slow charge for the remaining cycle.
Fast charging will disengage around 80% and at 90% will slow even more. This is to protect the battery.
If the battery temp get above about 101F fast charging will disengage. At around 104F it will stop charging all together.
Cool battery as it approaches 99F with a fan and/or damp microfiber cloth.
At ambient temperatures above 90F cooling will likely be needed for fast charging.

blackhawk said:
Temperature matters. Charging is an electrochemical reaction. Too low a temperature and fast charging will not engage. Charging below 72-82F can cause Li plating to form which will permanently degrade the cell.
Never attempt to charge a Li at 40F or less!
Best battery start temperature is 85-95F
Li's fast charge best in the 90's.
Below 60F fast charging may not engage and it will slow charge for the remaining cycle.
Fast charging will disengage around 80% and at 90% will slow even more. This is to protect the battery.
If the battery temp get above about 101F fast charging will disengage. At around 104F it will stop charging all together.
Cool battery as it approaches 99F with a fan and/or damp microfiber cloth.
At ambient temperatures above 90F cooling will likely be needed for fast charging.
Click to expand...
Click to collapse
I don't really work with Fareinheit, but after looking, battery is reporting it as around 29degrees when charging. It does seem to be more consistent the last 2 days, i wonder if it's because the OS was still trying to learn my usage. It still happens, i just need to unplug and plug it back in when it says slow/cable charging. But haven't tested it too much, so still unsure.
I am still waiting on charger, i'll keep this forum updated in case anyone else is interested.

kevinwu128 said:
I don't really work with Fareinheit, but after looking, battery is reporting it as around 29degrees when charging. It does seem to be more consistent the last 2 days, i wonder if it's because the OS was still trying to learn my usage. It still happens, i just need to unplug and plug it back in when it says slow/cable charging. But haven't tested it too much, so still unsure.
I am still waiting on charger, i'll keep this forum updated in case anyone else is interested.
Click to expand...
Click to collapse
Meh you do the conversion. For actual living the Celsius system is awkward at best.

blackhawk said:
Meh you do the conversion. For actual living the Celsius system is awkward at best.
Click to expand...
Click to collapse
Lol, i did. Temperature was fine.
I received my charger after i typed up message. I used it with super fast charging getting 3000mA from ampere app. Worked great unplugging and plugging it back in.
Tested using it on my s10 charger, and it showed up as fast charging, unplug, plugged it back in, cable charging only.
Went back to the 25w charger. It says super fast charging but hovers aroud 1000mA.
Can't get it to use high speed. Temperature at 28.5 degrees.
The only way for me, let it drain 10% and put it in the charger again to get 3000mA charging speed. The message that says "super fast charging" means nothing to be honest.

kevinwu128 said:
Lol, i did. Temperature was fine.
I received my charger after i typed up message. I used it with super fast charging getting 3000mA from ampere app. Worked great unplugging and plugging it back in.
Tested using it on my s10 charger, and it showed up as fast charging, unplug, plugged it back in, cable charging only.
Went back to the 25w charger. It says super fast charging but hovers aroud 1000mA.
Can't get it to use high speed. Temperature at 28.5 degrees.
The only way for me, let it drain 10% and put it in the charger again to get 3000mA charging speed. The message that says "super fast charging" means nothing to be honest.
Click to expand...
Click to collapse
In what battery % range are you charging? It should draw closer to 4000-5000 ma at its peak fast charge rate with a 25w brick.
About 2%@minute when fast charging at peak rate.
Erratic fast charging can indicate a battery failure.
Any swelling is a failure. Replace immediately it this happens.
Other signs are deminished battery capacity.
Try clearing system cache.
Toggle the fast charging switch on/off 3 times.
Discharge until phone shuts down then charge to 100%. Some say to do this 3 times but one cycle worked for me to recalibrate the battery gauge.
Fast charging is a little b*tch when it goes south but always suspect a battery failure if this happens. A swollen battery can damage and destroy the phone.
Battery failures can happen at any time but are more likely to happen with degraded Li's.

blackhawk said:
In what battery % range are you charging? It should draw closer to 4000-5000 ma at its peak fast charge rate with a 25w brick.
About 2%@minute when fast charging at peak rate.
Erratic fast charging can indicate a battery failure.
Any swelling is a failure. Replace immediately it this happens.
Other signs are deminished battery capacity.
Try clearing system cache.
Toggle the fast charging switch on/off 3 times.
Discharge until phone shuts down then charge to 100%. Some say to do this 3 times but one cycle worked for me to recalibrate the battery gauge.
Fast charging is a little b*tch when it goes south but always suspect a battery failure if this happens. A swollen battery can damage and destroy the phone.
Battery failures can happen at any time but are more likely to happen with degraded Li's.
Click to expand...
Click to collapse
Thanks for the response, with the testing i've done, it's been 70% to 100% only.
i've been needing my phone for work, so i haven't had a chance to discharge it. Will try it this weekend.
Do you charge it back to 100% after a complete discharge with the phone Off or On?

kevinwu128 said:
Thanks for the response, with the testing i've done, it's been 70% to 100% only.
i've been needing my phone for work, so i haven't had a chance to discharge it. Will try it this weekend.
Do you charge it back to 100% after a complete discharge with the phone Off or On?
Click to expand...
Click to collapse
At 70-100% you'll see much slower charging.
Li's prefer frequent midrange power cycling. It can extend their life by hundreds of full charge cycles. Example 40-70%
I rarely charge to 90-100% usually to 65-82%
I almost discharge below 30%, 40% or so being typical. Below 20% there's not a lot of usable energy. It also stresses the battery more when charging from a deep discharge state.
If you insist on charging to 100% at night at least slow charge it to reduce battery strain.

blackhawk said:
At 70-100% you'll see much slower charging.
Li's prefer frequent midrange power cycling. It can extend their life by hundreds of full charge cycles. Example 40-70%
I rarely charge to 90-100% usually to 65-82%
I almost discharge below 30%, 40% or so being typical. Below 20% there's not a lot of usable energy. It also stresses the battery more when charging from a deep discharge state.
If you insist on charging to 100% at night at least slow charge it to reduce battery strain.
Click to expand...
Click to collapse
i drained it to 0% until it turned off.
After turning back on, i plugged in the 25w charger and it started charging at 4000mA and max 4750 for only a few seconds for the first 10% and after that, it went down and stayed around 3000-3500mA. happy for that for now. So thanks for your input.
Basically, to get fast charging/super fast charging, don't unplug and plug in a few times unless you have to as it will revert to cable charging, and then you'll need to let it drain a little bit (i found, around 10mins ) before plugging it in again to get the fast speeds.

kevinwu128 said:
i drained it to 0% until it turned off.
After turning back on, i plugged in the 25w charger and it started charging at 4000mA and max 4750 for only a few seconds for the first 10% and after that, it went down and stayed around 3000-3500mA. happy for that for now. So thanks for your input.
Basically, to get fast charging/super fast charging, don't unplug and plug in a few times unless you have to as it will revert to cable charging, and then you'll need to let it drain a little bit (i found, around 10mins ) before plugging it in again to get the fast speeds.
Click to expand...
Click to collapse
Having the display on skews the charge curve, don't. It will charge slowly or not all if the display is on.
It you turn the display with it the battery page already open you have one or two seconds to see the display off mAh charging rate.
You can easily tell it's fast charging by watching how fast the battery percentage changes with the screen off.
1%@minute or less slow charging
2%@minute fast charging is active
Fast charging will ramp down depending on inputs like temperature and charge percentage the power controller recieves.
If it starts or goes under/over temperature fast charging will disengage for that charge cycle.
It also will ramp up/down sometimes throughout the below 80% range. This is normal.
Being in the optimum battery temperature range at the start and throughout the charge cycle is important but don't go too nuts. Higher is better than lower. Once the battery is below 70°F it will not fast charge as well (or at all) and/or can detrimental to the battery ie Li plating. There maybe other parameters the controller uses as well... not sure.
Oddly the Samsung 25w bricks are very tolerant of low input voltage. They will charge with as little as 60 VAC!

Like a few have said, fast charging like that will degrade your battery faster due to high temps, but the way you use it has a big impact on that. If you fast charge at those speeds to 100% take it off and use it constant until dead, and put it back on the charger then you will deff degrade it faster. Lithium cells need to rest between charge and discharge to let the the temperature settle. If not it's taking a hugh work load wearing down the internal resistance which drops the cells Mah rating.
Yeah, Im guilty of this too many times lol
Manufacturers know this as well but they know people want fast charging and largest battery capacity possible, they could at least make an option to lower the voltage down from 4.20v and a charger allowing us to switch between a few milliamp ratings..

BandSkipper said:
Like a few have said, fast charging like that will degrade your battery faster due to high temps, but the way you use it has a big impact on that. If you fast charge at those speeds to 100% take it off and use it constant until dead, and put it back on the charger then you will deff degrade it faster. Lithium cells need to rest between charge and discharge to let the the temperature settle. If not it's taking a hugh work load wearing down the internal resistance which drops the cells Mah rating.
Yeah, Im guilty of this too many times lol
Manufacturers know this as well but they know people want fast charging and largest battery capacity possible, they could at least make an option to lower the voltage down from 4.20v and a charger allowing us to switch between a few milliamp ratings..
Click to expand...
Click to collapse
You're correct it's best to allow some rest after charging and to not fast charge.
In practice this goes out the window
I do try to keep the voltage down as well as the temperature below 100F. Ambient temperatures here are frequently in the 90's
If I get a year out of this new battery I'm good with that.
However once it's down to 80% of its original capacity it gets replaced to avoid a failure. That's what happened to the original battery and I was lucky it didn't damage the display.
Below is my typical usage and the 10+'s fast charging patterns. The last charge ended with a near ideal battery charging temp of 94F. It fast charged nearly the whole time.

blackhawk said:
You're correct it's best to allow some rest after charging and to not fast charge.
In practice this goes out the window
I do try to keep the voltage down as well as the temperature below 100F. Ambient temperatures here are frequently in the 90's
If I get a year out of this new battery I'm good with that.
However once it's down to 80% of its original capacity it gets replaced to avoid a failure. That's what happened to the original battery and I was lucky it didn't damage the display.
Below is my typical usage and the 10+'s fast charging patterns. The last charge ended with a near ideal battery charging temp of 94F. It fast charged nearly the whole time.
Click to expand...
Click to collapse
wow that's intense! Battery nerd (in a good way!) I downloaded the app and i've deleted it, i'll just leave it the way i have it for now haha

blackhawk said:
You're correct it's best to allow some rest after charging and to not fast charge.
In practice this goes out the window
I do try to keep the voltage down as well as the temperature below 100F. Ambient temperatures here are frequently in the 90's
If I get a year out of this new battery I'm good with that.
However once it's down to 80% of its original capacity it gets replaced to avoid a failure. That's what happened to the original battery and I was lucky it didn't damage the display.
Below is my typical usage and the 10+'s fast charging patterns. The last charge ended with a near ideal battery charging temp of 94F. It fast charged nearly the whole time.
Click to expand...
Click to collapse
Jeez, had that app for a long time until about a year ago... I use AccA on a Rooted Pixel but id say I started using it a bit late.. You know none of this would be an issue if they still used replaceable damn batteries!! Lol My old Bar & Flip phones before color screens lasted days to over a week, and still had spare battery near by... My Startac even had a Solar panel battery

BandSkipper said:
Jeez, had that app for a long time until about a year ago... I use AccA on a Rooted Pixel but id say I started using it a bit late.. You know none of this would be an issue if they still used replaceable damn batteries!! Lol My old Bar & Flip phones before color screens lasted days to over a week, and still had spare battery near by... My Startac even had a Solar panel battery
Click to expand...
Click to collapse
Yeah I have a flip top and S4, takes about 30 seconds to change the batteries. Most of the newer Samsung's aren't that bad to change out the battery once you know a few tricks. Some phones with multiple batteries are bloody nightmares though.
Solar panel? That's pretty funny
One way to limit phone usage.

Question Samsung A33 5G charging time from 100% depleted to 100% full?

How long it is supposed to take to fully charge it with 25W charger?
Are the first times you charge it slower to reach full charge?

The time will vary. Battery capacity, discharge state at start of charge and the battery temperature throughout the charge cycle.
Charging from 0-100% stresses the battery (especially with fast charging) and shouldn't be commonly practiced.
Battery start charge temperature should be at least 72F, 82F is ideal. Cool it if it exceeds 99F while charging. Charging is a electrochemical reaction and some heat is needed to avoid Li plating.
Never attempt to charge an Li near freezing temperatures
Li's thrive on frequent partial charge cycling. 40-80% is a good range.
Avoid going below 20% or over 90% except occasionally for best lifespan.
High temperatures and high cell voltage are Li's biggest lifespan risks. Avoid running the phone when the battery is hot (>102F) or provide cooling. Keep it out of direct sunlight especially when charging.
Store Li's in a cool, dry place with a 50-70%charge, not 100%!

GSMArena:
" We tested the Galaxy A33 with the said 25W USB-C Samsung charger, and it replenished 50% of the battery in half an hour.
A full charge took 1 hour and 15 minutes, and in fact, that was the cited expected time to full charge by the software as well. "

Fast charging will yield roughly 2%@minute from 0-80% if battery doesn't go into over temperature ramp down. Time it to get the nominal rate for that device ie how many seconds per 1% when fast charging in the 40-70% range, probably 30-40 seconds per minute when new. As it's capacity from degradation drops so will this rate.
Charge rate will ramp down at around 80%, then again at about 90% to protect the battery.
Temperature is the biggest variable.
If the battery is below about 60F fast charging will not engage for that charge cycle in order to protect the battery.
Fast charging rate not clear cut as the power controller optimizes charge rate per conditions and will reduce charge rate if they're not in the optimum range.
Constant erratic fast charging cycles with a known good brick/cable indicates a battery failure.
Any battery swelling is a failure, stop charge and replace it asap. It can damage or destroy the phone
Replace the battery when it reaches 80% of its initial capacity, the end of its useful service life. At that point it's considered degraded, degraded Li's are far more likely to fail. An Li can fail at any time... it can happen fast. Cataclysmic failures however are rare.

My new A33 came a couple of days ago with about 30% charge. I used it a bit lightly with the intention of depleting it(so I can have it full when I root it), I haven't yet installed the SIM, and when it was about 15% I got tired so I downloaded an app "Generic Battery Drainer" to deplet it quicker until it reached 0% and turned off, then I charged it to 100% with the charger I purchased which came today(an OEM one)
I didn't know that you should never deplete the battery to 0% and also did not know that the battery should not be charged to 100%
I obviously also didn't know the dangers of high temperatures, because the drainer app took the cell phone to about 104ºF
What prompted me to post my question actually was that from 0% to 100% charge it took about 3 hours. So I'm wondering if maybe I should check if the OEM 25W charger that I got does not charge fast as advertised?

bogavante said:
My new A33 came a couple of days ago with about 30% charge. I used it a bit lightly with the intention of depleting it(so I can have it full when I root it), I haven't yet installed the SIM, and when it was about 15% I got tired so I downloaded an app "Generic Battery Drainer" to deplet it quicker until it reached 0% and turned off, then I charged it to 100% with the charger I purchased which came today(an OEM one)
I didn't know that you should never deplete the battery to 0% and also did not know that the battery should not be charged to 100%
I obviously also didn't know the dangers of high temperatures, because the drainer app took the cell phone to about 104ºF
What prompted me to post my question actually was that from 0% to 100% charge it took about 3 hours. So I'm wondering if maybe I should check if the OEM 25W charger that I got does not charge fast as advertised?
Click to expand...
Click to collapse
You should fully charge a new battery before using. Are you using the cable that came with the brick? Is the wall socket wired correctly?
3 hours is far too long for fast charging.
Observe while charging to see if it's fast charging be % per minute.
The display must be off or it will skew the charge rate badly. Start and maintain it in temperature parameters described when charging.
If it drops out of fast charging because of temperature it will likely not reengage unless the cycle is manually started again ie unplug/ plug back in. Don't try to fast charge a hot (>98F) battery, it won't work. Cool the battery down and use cooling while charging. A damp microfiber cloth and/or fan work well.
Briefly turning on the display will not break the fast charging, it will resume once you turn off the display. Low current drain apps like Poweramp/bt can be used while fast charging but not high current drain ones.

blackhawk said:
Are you using the cable that came with the brick? Is the wall socket wired correctly?
Click to expand...
Click to collapse
I used the cable that came with the OEM charger that I purchased, seems to be identical kind of cable as the one that came with the phone.

bogavante said:
I used the cable that came with the OEM charger that I purchased, seems to be identical kind of cable as the one that came with the phone.
Click to expand...
Click to collapse
Should be good to go.
When you get to 40%, try again... it's probably ok.
Try using a wall socket on a different breaker. Line voltage fluctuations won't effect this brick however neutral/ground fault might. Avoid using on a circuit with large induction motors on it ie microwave ovens, friges and A/C