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Charging speed seems slow than expected on Pixel 2

Hi all! My Pixel 2 charges fast(~2700mA) up to first ~20%, then the current changes to 1370mA till almost to 90%, then slows a bit till the 100%. I have used Ampere to check the charging speed. I expected the phone to charge to at least 50% at a fast rate, then slow down a bit.
I recently acquired the device and it had May patch, but then after setting the device up, it prompted me for June patch and I installed it. Don't know if the new update could be the problem.

The phone will take battery temperature into account as well. Do you have a way to monitor that and correlate it with where the current switch points are?
Sent from my Pixel 2 using Tapatalk

DurhamHusker said:
The phone will take battery temperature into account as well. Do you have a way to monitor that and correlate it with where the current switch points are?
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I charge my phone early in the morning where it was not used all night. No battery drain apps at all. It just charges from almost 0 to 20 percent really fast, but then slows to a steady 1370 mA.

What I mean is ... Try charging from a different start point.
By the time it's charged at 2.7 amps to go from 0 to 20 it might be getting warm. You might try charging when it's at 20 and cool and see what happens. Or stop at 20 and let it cool down before going any further and see what happens.
Sent from my Pixel 2 using Tapatalk

DurhamHusker said:
What I mean is ... Try charging from a different start point.
By the time it's charged at 2.7 amps to go from 0 to 20 it might be getting warm. You might try charging when it's at 20 and cool and see what happens. Or stop at 20 and let it cool down before going any further and see what happens.
Sent from my Pixel 2 using Tapatalk
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Oh, I see now. Good point. Will try it!

Charkatak said:
Oh, I see now. Good point. Will try it!
Click to expand...
Click to collapse
DurhamHusker said:
What I mean is ... Try charging from a different start point.
By the time it's charged at 2.7 amps to go from 0 to 20 it might be getting warm. You might try charging when it's at 20 and cool and see what happens. Or stop at 20 and let it cool down before going any further and see what happens.
Sent from my Pixel 2 using Tapatalk
Click to expand...
Click to collapse
So I did some testing and here is what I see:
Phone starts to charge at a good 2700mA rate for ~ a minute, then slows down to 1370mA. It doesn't really matter if phone has 5% of battery before I start charging or 20% or 40%, the charging pattern is the same. At start the battery temperature is ~32 C and when it charges at 2700 for that first minute or so, the temp rises to ~36 C, then phone drops the charging rate to 1370. Phone is pretty much room temperature and not hot or anything like that. I have 2 Google chargers; One is from original Pixel and the other is from Pixel 2 box. Both do the same thing and charge at the same rate.
There are no abnormal app activity or any battery drain. I am using Ampere app to check mA. Did anyone come across this?

It appears you've discovered the magic battery temperature cutoff that HTC has selected for the Pixel 2 ... and that seems to be around 35 or 36 degrees.
For every 10 C rise in temperature, battery degradation doubles by almost every measurable metric. It doesn't surprise me that at around 35 C your phone appears to limit the charge current ... seemingly to avoid making the battery any hotter. Taking the temperature higher for the charge cycle (or for any other reason) will degrade the battery over time. Deep discharges toward zero also reduce the life of a battery. (Keeping it at 50% or higher is recommended for lithium-ion rechargeable batteries.)
If you can cool the phone down to 25 C before starting to charge, I'd be willing to bet that it will charge at the higher rate for longer. Maybe put a small fan on the phone or set it in front of an A/C vent while it charges and see what happens then.

DurhamHusker said:
It appears you've discovered the magic battery temperature cutoff that HTC has selected for the Pixel 2 ... and that seems to be around 35 or 36 degrees.
For every 10 C rise in temperature, battery degradation doubles by almost every measurable metric. It doesn't surprise me that at around 35 C your phone appears to limit the charge current ... seemingly to avoid making the battery any hotter. Taking the temperature higher for the charge cycle (or for any other reason) will degrade the battery over time. Deep discharges toward zero also reduce the life of a battery. (Keeping it at 50% or higher is recommended for lithium-ion rechargeable batteries.)
If you can cool the phone down to 25 C before starting to charge, I'd be willing to bet that it will charge at the higher rate for longer. Maybe put a small fan on the phone or set it in front of an A/C vent while it charges and see what happens then.
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That is interesting as I have had different phones which got even warmer than Pixel 2, but still charged at a good rate. I do know that after 80% of charge of so, the charge rate does go down, which isn't a surprise to me. I just picked up my phone, after it was sitting idle for few hours and see that battery/phone temp is 25 C. I will make sure to start charging phone at a low temperature and see if it will keep the fast charge rate longer.
What you mentioned about the "keeping battery at 50% or so). Did you mean that when battery goes down to 50 or so %, charge it? I usually run battery until about 30 or so % before charging it.

Charkatak said:
That is interesting as I have had different phones which got even warmer than Pixel 2, but still charged at a good rate. I do know that after 80% of charge of so, the charge rate does go down, which isn't a surprise to me. I just picked up my phone, after it was sitting idle for few hours and see that battery/phone temp is 25 C. I will make sure to start charging phone at a low temperature and see if it will keep the fast charge rate longer.
What you mentioned about the "keeping battery at 50% or so). Did you mean that when battery goes down to 50 or so %, charge it? I usually run battery until about 30 or so % before charging it.
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Yes, charging it when it gets to around 50%, based on a number of studies, seems to be the way to go.
Deep discharges and hot temperatures are enemies of battery life for today's lithium-ion cells.

DurhamHusker said:
Yes, charging it when it gets to around 50%, based on a number of studies, seems to be the way to go.
Deep discharges and hot temperatures are enemies of battery life for today's lithium-ion cells.
Click to expand...
Click to collapse
I have tried just now to start charging the phone when it is 23 C, but still get the same result. Could it be the June security patch?
Update: So the phone charged by rate of 1370mA from 22% to 100% in 1h 25m. So going from 0 to 100% should take ~1h 45m? Can anyone confirm how long it takes to charge Pixel 2 using original charger?

DurhamHusker said:
Yes, charging it when it gets to around 50%, based on a number of studies, seems to be the way to go.
Deep discharges and hot temperatures are enemies of battery life for today's lithium-ion cells.
Click to expand...
Click to collapse
Go a reference to these studies?
This app vendor has seen a lot and isn't convinced discharging to low values has much material effect on battery service life. Charging to high levels does, however. Interesting read I think... with commentry on the often quoted Battery University pages. I agree that heat isn't good whatever.
https://accubattery.zendesk.com/hc/en-us/articles/210224725-Charging-research-and-methodology
https://accubattery.zendesk.com/hc/en-us/articles/212988989-About-the-Battery-University-article

WibblyW said:
Go a reference to these studies?
This app vendor has seen a lot and isn't convinced discharging to low values has much material effect on battery service life. Charging to high levels does, however. Interesting read I think... with commentry on the often quoted Battery University pages. I agree that heat isn't good whatever.
https://accubattery.zendesk.com/hc/en-us/articles/210224725-Charging-research-and-methodology
https://accubattery.zendesk.com/hc/en-us/articles/212988989-About-the-Battery-University-article
Click to expand...
Click to collapse
I can't point to anything peer reviewed or funded by the NSF ... so maybe 'studies' is the wrong word.
I've seen the Battery University articles and they've seemed believable to me. It's possible they're flawed. I've also seen articles from these guys - https://www.mpoweruk.com/life.htm ... and other tech writers who corroborate such claims. I've also seen the claims about the high level charging you're pointing to and some who suggest you should keep your battery between 50% and 85% all the time to get the most out of it.

Charging speed

To power up, you consume Red Bull. But your phone just needs its adaptive fast charger. Rate this thread to express how quickly the OnePlus 6T can charge. A higher rating indicates that it charges extremely fast.
Then, drop a comment if you have anything to add!

dash charge (now called fast charge) is crazy fast!!

Still, I would only recommend using that feature if there is a real benefit - i.e. time is of the essence. The battery will age quicker being dash charged all the time.

saw 60 percent at 35 minutes and 38 seconds, which is more or less in line with what OnePlus claims

Incredibly fast compared to my old Honor 8. One example I have is the first charge I did 5 days ago when I had bought it at a pop-up event here in Sweden. I had used it for about 1-2 hours with the screen on when I was setting it up and trying out the phone. Then when I plugged it in, it went from 36% to 75% in just 24 minutes. That's insanely fast
I've also noticed that just like OnePlus claims, the phone basically charges at the same speed with the screen on as if I would have had the screen off.

Bäcker said:
Still, I would only recommend using that feature if there is a real benefit - i.e. time is of the essence. The battery will age quicker being dash charged all the time.
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Can you provide any factual basis for this statement? Research or articles from established professionals in the field of battery charging?
Everything I've read from reliable sources state that the biggest impact on battery longevity is temperature. Repeated heating (or extreme cooling for that matter) will accelerate the "aging" process, as you put it. OnePlus has actually solved this problem by offloading the energy conversion that causes heat to the power brick, leaving the phone cool during charging (pretty ingenious). I've also read that not always charging the battery fully to 100% can prolong longevity, which is why you get charging strategies on laptops that will stop charging at 80% or 60% if you leave your laptop plugged in 24/7.
Point being, the ONLY way to slowly charge this device would be to use a third party charger and/or cable.
The reason I ask this, is that the manufacturer, OnePlus, clearly states in their documentation that comes with the phone or dash chargers to ONLY use the charger and cable that came with the phone.
Please charge the OnePlus Dash device only with the official Dash Power Adapter and Dash Type-C Cable. Using unauthorized adapter can be dangerous and may void your warranty.
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I'm not completely opposed to the idea that this could just be a marketing ploy to get you to buy their own adapter and accessories, but again just want to know if there's any substantial proof that fast charging, by itself, degrades the battery faster, of if it's just a case of incorrect tribal knowledge.
Thanks.

You are correct that the rate of charge and discharge alone are not the only deciding factors on lipo life and certainly not the most decisive ones.
Excessive heat, especially on high charge levels, is the biggest factor for increased aging.
As you mentioned extreme charging levels (completely empty or full) will also contribute to faster aging, albeit the impact is not that extreme for these low current-draw Lipos used in our phones (as opposed to high-drain Lipos for instance).
Discharge and Charge at high rates will also contribute to the speed of aging, but not as much as heat.
When a lipo spends most of its time one medium charging levels at moderate temperatures and is only charged and discharged with low rates on it will have the longest service life.
This is common for all Lipos, just how much a low or high rate is for that particular battery differs (low drain, high capacity VS high drain, low capacity cell)
With Lipos everything is a compromise. Max and min voltages, max temperatures, max draw are values the manufacturer has chosen as the best compromise to reach the intended MTBF. All these numbers are not physical absolute barriers.

Charges 0-100% in 1hr 30 mins

Second place after SuperCharge (even first gen) from Huawei. Much better than QC 3.0

Klanac89 said:
Second place after SuperCharge (even first gen) from Huawei. Much better than QC 3.0
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Nope. Super VOOC (OPPO) is hands down the fastest!

Gustav Karlsson said:
Nope. Super VOOC (OPPO) is hands down the fastest!
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Click to collapse
First of all, how many device support Super VOOC? How many device you can buy outside China with VOOC?
Super VOOC is 50W, the same like Huaweis SuperCharge 2.
Did you test SuperCharge 2 or VOOC?

My OP6T charges up to 100% in 1hr 22mins, so I don't charge overnight anymore. Go to sleep on 40% and charge in the morning

The combo of battery life and crazy fast charging is for the first time breaking me of the "plug it in overnight" habit that I have had since my first cell phone over a decade ago. I can keep my charger at my desk, plug it in for half an hour, and be at 100% with almost no chance of running out before the next morning. That means fewer vampire chargers around the house wasting power, and fewer charge cycles lost leaving the phone plugged in long after it's full. I wish I had swapped to OnePlus sooner - I think I have finally found a phone maker to call my favorite.

The charging Speed with "Dash charge" is amazing.
Within few minutes the battery is from 0% to over 50%!
Generelly I can only say: Amazing battery life. The best I ever had with a phone (except Nokia 3310).

I started to charge when the battery was 5%. It took around 1 hour 20 mins. I can say this to be quite faster when compared to the devices I have used previously, that too when the size of the battery is much bigger than the previous phones.

Illrigger said:
The combo of battery life and crazy fast charging is for the first time breaking me of the "plug it in overnight" habit that I have had since my first cell phone over a decade ago. I can keep my charger at my desk, plug it in for half an hour, and be at 100% with almost no chance of running out before the next morning. That means fewer vampire chargers around the house wasting power, and fewer charge cycles lost leaving the phone plugged in long after it's full. I wish I had swapped to OnePlus sooner - I think I have finally found a phone maker to call my favorite.
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The incredibly fast charging, coupled with the insane battery life (especially in dark mode) has made me totally OK with no wireless charging. I used to leave my phone on the charging pad at my desk most of the day, and on my nightstand charging pad overnight. I never had to worry about charging at all and plugged in maybe 20 times max over the last two years with my Note5. I said I'd never buy a phone without wireless charging, but the $350 or so I got for my Note5 exchange for this phone was just too tempting to overlook, particularly if it set up my family for the next two to three years (our current phones didn't have band 71 and Samsung said no more security updates). The only thing I was really worried about was wireless charging and whether or not the battery life and dash charging would be enough for me to overcome range anxiety.
It has.

So I'm thinking of keeping my dash charger at home ,and my 30w aukey charger at work ,I take it this will be ok to use ?

Gustav Karlsson said:
Nope. Super VOOC (OPPO) is hands down the fastest!
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mate 20 pro, charges 4200 mAh in 1 hour.

Shady282 said:
mate 20 pro, charges 4200 mAh in 1 hour.
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Oppo Find X (Lamborghini edition) charges 3300 mAh in 35 min...

combat goofwing said:
So I'm thinking of keeping my dash charger at home ,and my 30w aukey charger at work ,I take it this will be ok to use ?
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It should be. If you are starting from full in the morning I doubt you will even need the charger are work except for very rare instances. I have gotten 7 hours SOT that was mostly gaming on this thing, moderate use you can easily get 24 hours, light use around 48.

I have a question on how to slow charge Pixel 4a

Since you already know that Pixel 4a supports 18W charging through USB C-C using USB-PD. Is it possible to charge the device a bit more slowly to keep the battery cool and possibly increase its life span?
A simple Google search showed that by using USB A-C cable, it won't be doing USB-PD quick charging instead it will charge using USB-BC (Battery Charging, a legacy standard) which will limit the power at around 7W.
By attaching USB-C end of the quick switch adapter(OTG) that came with the device to power adapter and connecting its other end (USB-A) to the device itself by running a USB A-C cable in between. Will this make the device charge slowly? Can anyone test this?

To find out for sure how much current is being used to charge your phone, you should install an app like this:
Ampere - Apps on Google Play
Measure the charging and discharging current of your battery.
play.google.com

JohnC said:
To find out for sure how much current is being used to charge your phone, you should install an app like this:
Ampere - Apps on Google Play
Measure the charging and discharging current of your battery.
play.google.com
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question is on how to slow charge the device

Well, just get a 1amp charger or use a non-quick charge cable.
The problem is that you won't know if an amazon description for a cable is accurate or not.
So, the way to make sure it is charging slow, is to use the app I mentioned.

I charge my pixel 4a with a 350 mah charger (it is an old Motorola charger in micro usb, i just put à micro usb to usb c little gizmo).
It is around 1,5 w and charge my pixel 4a in around 10 hours , if the pixel is completly empty. You can also use a 5w charger with a usb a usb c câble, it will be faster but warmer

Any brick or cable that doesn't support that protocol or can't supply enough amps will cause the power controller to default to slow charging.
Most fast charging capable phones also have a software option to disable fast charging regardless of the brick/cable's rating.
The real trick is getting it to fast charge when you want it to

My goal was to charge my pixel 4a during the night with the slowest method to keep my battery as Healthy as possible. The 350mah just give me that. ( i keep my phone four to five years so i Try to take care of my battery)

lop1 said:
My goal was to charge my pixel 4a during the night with the slowest method to keep my battery as Healthy as possible. The 350mah just give me that. ( i keep my phone four to five years so i Try to take care of my battery)
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Don't let it drop below 40% or charge beyond 72% in that case.
At some point it's just easier to replace the battery though

blackhawk said:
Don't let it drop below 40% or charge beyond 72% in that case.
At some point it's just easier to replace the battery though
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This seems more an urban legend this 40 72%, the charging processor take care of that For you.

lop1 said:
This seems more an urban legend this 40 72%, the charging processor take care of that For you.
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Li's prefer midrange usage with frequent partial charges. Cuts down the heat and the high cell voltage that degrades them faster. Degrades them only a fraction of a full charge cycle. Longer lifespan and less time charging for the same amount of mAh. Win-win.
Even today many confuse their requirements with NiCads Thinking they should fully charge/discharge them. Trying to convince some them otherwise is like talking an alcoholic out of drinking booze. "I've always done it that way..."

@blackhawk
but if someone who follows this 40-80 rule, how to reset battery stats?
Can it be done using ADB command?

ashutoshmn said:
@blackhawk
but if someone who follows this 40-80 rule, how to reset battery stats?
Can it be done using ADB command?
Click to expand...
Click to collapse
I really don't use those stats at all. More Google hype that never proved all that useful for me.
I use Galaxy Labs Battery Tracker, the history log* of Accubattery as well as karma Firewall logs to track usage.
Occasionally you may want to do a calibration too as the % accuracy will drift over time.
*as long as my usage stays at >10%@ hour SOT, I'm not very concerned

blackhawk said:
I really don't use those stats at all. More Google hype that never proved all that useful for me.
I use Galaxy Labs Battery Tracker, the history log* of Accubattery as well as karma Firewall logs to track usage.
Occasionally you may want to do a calibration too as the % accuracy will drift over time.
*as long as my usage stays at >10%@ hour SOT, I'm not very concerned
Click to expand...
Click to collapse
and by calibration, do you mean drain to 0 and charge to 100 every once in a while?

ashutoshmn said:
and by calibration, do you mean drain to 0 and charge to 100 every once in a while?
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Click to collapse
Yeah, which I don't like doing. If falls way out of calibration you'll think you're at 20% when in fact you're at 7% for example.
Many say to repeat the calibration cycle 2 or 3 times for it to take.
If the battery has failed this can be a dangerous procedure. How do I know? Just had a battery failure but because of the case didn't see the back cover bulging. All the while I was happily torturing the bad cell for over a month begging it to do its worse
I was fortunate it didn't damage the display of my Note 10+ or worse.
If you encounter erratic fast charging, reduced battery capacity always suspect a battery failure and look for the telltale back cover bulge. These bag Li's can fail at any time especially as they get older.

BTW, people who are reading this, you can charge your 4a at 7.5W (5V*1.5A) using OTG adapter plugged into the charger and a USB A-C cable. The temp. increase of battery is way less than full fast charge of 18W.

ashutoshmn said:
BTW, people who are reading this, you can charge your 4a at 7.5W (5V*1.5A) using OTG adapter plugged into the charger and a USB A-C cable. The temp. increase of battery is way less than full fast charge of 18W.
Click to expand...
Click to collapse
Also bare in mind that even when slow charging you never want the Li cell temp below 72°F, but 82F is a better bottom threshold temperature.
Li plating* can result from cold or hot (>100F) charging regardless of charging rate.
NEVER EVER attempt to charge an Li in near freezing temperatures*
*this can lead to a thermal runaway event

blackhawk said:
Also bare in mind that even when slow charging you never want the Li cell temp below 72°F, but 82F is a better bottom threshold temperature.
Li plating* can result from cold or hot (>100F) charging regardless of charging rate.
NEVER EVER attempt to charge an Li in near freezing temperatures*
*this can lead to a thermal runaway event
Click to expand...
Click to collapse
Billions of Li devices in service around the globe. If this was a 'thing' manufactures would prevent charging at low temps. Not debating the wisdom or detremental effects on longevity of charging at low/high temps. No need to season the spew with faux drama.

DB126 said:
Billions of Li devices in service around the globe. If this was a 'thing' manufactures would prevent charging at low temps. Not debating the wisdom or detremental effects on longevity of charging at low/high temps. No need to season the spew with faux drama.
Click to expand...
Click to collapse
Do what you want... and you're own research*.
You offer zero good advice and a half mass flame attempt.
Lead me, follow me or get the hell out of my way.
*https://www.sciencedirect.com/scien...of the internal,also affect the battery power.
Temperatures I suggested are for optimum performance/longevity with minimum chance of Li plating from multiple sources. They are very conservative.
I just had a battery failure on my Note 10+ that started by slow charging it to 100% at about 45-50°F. Boom, just like that. Took over a month to realize what had happened but that's what started the whole mess. I was fortunate the swollen battery didn't damage my display.

Oy vey - self-designated expert in a box with a short fuse. Happy Mother's day, champ.

DB126 said:
Oy vey - self-designated expert in a box with a short fuse. Happy Mother's day, champ.
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WYSIWYU... call it like I see it.
Mum's been dead for decades.
Hope your's is not... spend some time with her.
You only get one.

Question 85% VS 100% - and why?

I have always charged my phones to 100%, this 85% thing is very new to me.
I've never heard about it before until I saw it in my S22 ULTRA.
What are the benefits of charging only to 85%? Does it last as much as with 100%?
Does it really recommended to charge it up to 85%? Im not an heavy user, but also I'm not changing my phone once a year, I'm changing it one time in 3-4 years.
Also, I tried to never charge my phone at night, and trying to catch the battery not lower than 10-15 percent to charge.
So basically, it bothers me a little bit in the eye to see that the phone is only about 85%, because that way basically the battery will run out much faster(significantly, yesterday 10% went down in 45 minutes, which means I'll lose 45 minutes from battery usage for nothing).
So, my question is, is it really worth it? Is there a significant difference between the two options? I'd love your help, thank you all!

The 85% is to protect and prolong the battery life. I agree that you will loose 15% of battery time if not charging to 100%. I charge to 100% and when battery is 10 - 15 I charge to full. I guess on the long run it's better for the battery to only charge to 85%, but I change phones every year or 2, so I'm not to worried about prolonging the battery life

Set low limit at 30-40%
Top limit of 72-85% is better.
Li's love frequent midrange power cycling.
Start charge temperature is important to prevent Li plating. Battery should be at least at 72F, 82-90F is better. Cool if charging temperature goes above 99F. Never charge in direct sunlight.
Never attempt to charge at 40F or lower
Avoid having the screen on while changing.
When using, turn phone off if battery temperature reaches 100F or cool it.
Replacing the battery isn't a big deal unless you don't do it on a timely basis. When an Li has reached 80% of it's original capacity it's reached the end of it's useful service life and is degraded.
Degraded Li's are more likely to fail which can heavily damage the phone. Any swelling is a failure replace immediately.
High voltage , temperature and current drain stress the battery. Other than avoiding low temperature charging and going to either low/high extreme voltage ranges constantly I wouldn't worry about it too much.
I now replace my heavily used Note 10+ battery every year or so to avoid another failure, routine maintenance. Batteries are cheap and relatively easy to replace.

blackhawk said:
Set low limit at 30-40%
Top limit of 72-85% is better.
Li's love frequent midrange power cycling.
Start charge temperature is important to prevent Li plating. Battery should be at least at 72F, 82-90F is better. Cool if charging temperature goes above 99F. Never charge in direct sunlight.
Never attempt to charge at 40F or lower
Avoid having the screen on while changing.
When using, turn phone off if battery temperature reaches 100F or cool it.
Replacing the battery isn't a big deal unless you don't do it on a timely basis. When an Li has reached 80% of it's original capacity it's reached the end of it's useful service life and is degraded.
Degraded Li's are more likely to fail which can heavily damage the phone. Any swelling is a failure replace immediately.
High voltage , temperature and current drain stress the battery. Other than avoiding low temperature charging and going to either low/high extreme voltage ranges constantly I wouldn't worry about it too much.
I now replace my heavily used Note 10+ battery every year or so to avoid another failure, routine maintenance. Batteries are cheap and relatively easy to replace.
Click to expand...
Click to collapse
So, I understand that it recommended to charge up to 85%? :-D
I searched on google to buy a S22 ultra battery that will keep in home until I need it, but couldn't find one.

maor23 said:
I have always charged my phones to 100%, this 85% thing is very new to me.
I've never heard about it before until I saw it in my S22 ULTRA.
What are the benefits of charging only to 85%? Does it last as much as with 100%?
Does it really recommended to charge it up to 85%? Im not an heavy user, but also I'm not changing my phone once a year, I'm changing it one time in 3-4 years.
Also, I tried to never charge my phone at night, and trying to catch the battery not lower than 10-15 percent to charge.
So basically, it bothers me a little bit in the eye to see that the phone is only about 85%, because that way basically the battery will run out much faster(significantly, yesterday 10% went down in 45 minutes, which means I'll lose 45 minutes from battery usage for nothing).
So, my question is, is it really worth it? Is there a significant difference between the two options? I'd love your help, thank you all!
Click to expand...
Click to collapse
If you can last to bedtime on an 85% charge then fine use that setting if you intend to keep the device for 3 years or longer.
If (like me) you need 100% charge to get through the day, continue charging to 100% and dont worry.
I have been using mobile phones for 25 years and I charge overnight as I sleep. I have NEVER had a battery failure or problems.
Life is short, enjoy your new phone
P.S. If you are worried about stressing the battery by charging to 100%, I suggest you also disable Fast-Charging as that is WORSE for a battery cell than 100% vs 85% iMHO.

I used to charge my Note 10+ to 100%, every day plug it while in my car or plug it to my laptop now and then. After 2 years of use battery health was 89%.
On my Lenovo laptop I stop charging at 60% as suggested by Lenovo vantage. Bull****. Battery lasts a lot less after one year. Almost the half.
Enjoy your gadgets and mobiles. Anyway after 2 years most of us get a new one.

blackhawk said:
Set low limit at 30-40%
Top limit of 72-85% is better.
Li's love frequent midrange power cycling.
Start charge temperature is important to prevent Li plating. Battery should be at least at 72F, 82-90F is better. Cool if charging temperature goes above 99F. Never charge in direct sunlight.
Never attempt to charge at 40F or lower
Avoid having the screen on while changing.
When using, turn phone off if battery temperature reaches 100F or cool it.
Replacing the battery isn't a big deal unless you don't do it on a timely basis. When an Li has reached 80% of it's original capacity it's reached the end of it's useful service life and is degraded.
Degraded Li's are more likely to fail which can heavily damage the phone. Any swelling is a failure replace immediately.
High voltage , temperature and current drain stress the battery. Other than avoiding low temperature charging and going to either low/high extreme voltage ranges constantly I wouldn't worry about it too much.
I now replace my heavily used Note 10+ battery every year or so to avoid another failure, routine maintenance. Batteries are cheap and relatively easy to replace.
Click to expand...
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how does one set low limit?
i have a smart plug i use for my charger, only on long enough to charge phone from 20% to 85% (battery setting limit enabled).
i usually charge at 30% to 85%.

Slade8525 said:
how does one set low limit?
i have a smart plug i use for my charger, only on long enough to charge phone from 20% to 85% (battery setting limit enabled).
i usually charge at 30% to 85%.
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I just do it by eye. It's not rocket science.
Accubattery lets you set an alarm if you want.

maor23 said:
So, I understand that it recommended to charge up to 85%? :-D
I searched on google to buy a S22 ultra battery that will keep in home until I need it, but couldn't find one.
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Keeping a spare isn't a good plan as Li's start to degrade as soon as assembled. So after a year or more of sitting there it will have lost some of its initial capacity.
They should became easier in the future.

Any solution to modify the protect level?
"protect battery level 90%, 95% mod instead of 85%"
85% seem to be very short time of using

For anybody wanting to change the limit from 85% to lets say 90%, you can use the App called Galaxy Max Hz, you can find it on this forum : https://forum.xda-developers.com/t/...ods-qs-tiles-tasker-support-and-more.4404929/
One of the options is to change the battery charge limit, on the lock screen it will still say : "Charging stopped at 85%" even though the battery is at 90% as set in Galaxy Max Hz

coolpixs4 said:
Any solution to modify the protect level?
"protect battery level 90%, 95% mod instead of 85%"
85% seem to be very short time of using
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85% is actually rather on the high side. Either correct the excessive battery drain or replace the battery. When an Li reaches 80% of its original capacity it's reached the end of its usable service life. It's degraded at that point. Degraded Li's are much more likely to fail. Any battery swelling is a failure.

My device does not have 'protect battery' toogle on quick settings
SS22+ OneUI4.1

coolpixs4 said:
Any solution to modify the protect level?
"protect battery level 90%, 95% mod instead of 85%"
85% seem to be very short time of using
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bixby probably

Actually, the protection level should be 80% or less to maximize the battery’s useful life.

malikin said:
bixby probably
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coolpixs4 said:
Any solution to modify the protect level?
"protect battery level 90%, 95% mod instead of 85%"
85% seem to be very short time of using
Click to expand...
Click to collapse
verszipo said:
For anybody wanting to change the limit from 85% to lets say 90%, you can use the App called Galaxy Max Hz, you can find it on this forum : https://forum.xda-developers.com/t/...ods-qs-tiles-tasker-support-and-more.4404929/
One of the options is to change the battery charge limit, on the lock screen it will still say : "Charging stopped at 85%" even though the battery is at 90% as set in Galaxy Max Hz
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Click to collapse

freco said:
I used to charge my Note 10+ to 100%, every day plug it while in my car or plug it to my laptop now and then. After 2 years of use battery health was 89%.
On my Lenovo laptop I stop charging at 60% as suggested by Lenovo vantage. Bull****. Battery lasts a lot less after one year. Almost the half.
Enjoy your gadgets and mobiles. Anyway after 2 years most of us get a new one.
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I use the 60% protection on my Lenovo as they suggested and gess what, after 8 years my battery still works fine, and lasts for 2h/3h. I used my laptop every workday on heavy use, and it's the most cheap line, it cost me 300€ in 2015 (Lenovo G50-30 Celeron N2840). It's all day pluged, but when i need to use on battery it's fine!
So i realy think this battery protection works, and my S22 Ultra it's for last at least 5 years, and the 85% it's enough to run my workday.

burnin said:
I use the 60% protection on my Lenovo as they suggested and gess what, after 8 years my battery still works fine, and lasts for 2h/3h. I used my laptop every workday on heavy use, and it's the most cheap line, it cost me 300€ in 2015 (Lenovo G50-30 Celeron N2840). It's all day pluged, but when i need to use on battery it's fine!
So i realy think this battery protection works, and my S22 Ultra it's for last at least 5 years, and the 85% it's enough to run my workday.
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Maybe. Depends on usage. On my N10+ which is heavily used with frequent charge cycling from 40-60% to 72 to 85% most times I get about 2 years out of a battery. Higher battery temperature shortens the lifespan as well. Fast charging is more stressful as is using the device right after a fast charge. High current drain while in use is also stressful; optimize the device to increase SOT and battery lifespan.
Frequent partial charge power cycling can extent the typical 200 full charge cycles to 800 or more. A partial charge is not a full charge cycle.
Start charge temperature matters.
It's an electrochemical reaction, heat is required for it to charge properly!
-//-
Never attempt to charge if near freezing
Fast charging will not engage if battery temperature is below about 55F to protect the battery.
Charging below 72F or above 103F can cause Li plating which will permanently degrade the cell.
Optimum start temperature is 82-90F, cutoff is 100-102F max. Cool if needed.
Regardless of service time replace the Li when it reaches 80% of its original capacity. At 80% it's reached the end of its service life and is considered degraded. Degraded Li's are more likely to fail
Any swelling is a failure and it can destroy the device. Battery replacement isn't hard or expensive. Just part of routine maintenance...

maor23 said:
I have always charged my phones to 100%, this 85% thing is very new to me.
I've never heard about it before until I saw it in my S22 ULTRA.
What are the benefits of charging only to 85%? Does it last as much as with 100%?
Does it really recommended to charge it up to 85%? Im not an heavy user, but also I'm not changing my phone once a year, I'm changing it one time in 3-4 years.
Also, I tried to never charge my phone at night, and trying to catch the battery not lower than 10-15 percent to charge.
So basically, it bothers me a little bit in the eye to see that the phone is only about 85%, because that way basically the battery will run out much faster(significantly, yesterday 10% went down in 45 minutes, which means I'll lose 45 minutes from battery usage for nothing).
So, my question is, is it really worth it? Is there a significant difference between the two options? I'd love your help, thank you all!
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Here is a good article why it's recommended to not load the batt to 100%
How to maximize battery life: Charging habits and other tips
If you've ever wondered what the best way to charge your battery is, here are some scientifically proven tips for maximizing battery life.
www.androidauthority.com
Personally i just keep the load between 65% and around 20-30%. Only if i know that i will leave the house longer than 4 hours I do a 85% load or 100% if i want to film and take photos. But this rarely happens.

Question Battery charge limits

Are you going to limit your charge to 80% or do trust that 100% charges won't harm your battery?
There's well known science that backs charging your battery too high and often will degrade it's lifespan.
But there's also the argument that phones now have smart charging and similar to EVs when the phone hits 100% on its display the charge is still only really around 80% of true capacity.

There's no way manufacturers are sacrificing that much of our battery life with how much we all gripe about it.
I use AccuBattery with an 85% alarm. That seems to be good enough for me.

I'm trying to limit my charging. I rooted my P7P yesterday but haven't been able to get charging limits to work with AccA. I'm using the 2022-6-4 version of AccA right now. Does anyone know a working method to limit charging that is persistent? I'm not going to redo something with every reboot.

NCVol said:
I'm trying to limit my charging. I rooted my P7P yesterday but haven't been able to get charging limits to work with AccA. I'm using the 2022-6-4 version of AccA right now. Does anyone know a working method to limit charging that is persistent? I'm not going to redo something with every reboot.
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Try out putting chargingSwitch=(gcpm/constant_charge_current_max 4000000 0 --) in /data/adb/vr25/acc-data/config.txt
It's been rock solid for me on my Pixel 6 Pro. You might have to run acc and test the available switches, it could've changed with the Pixel 7.

Namelesswonder said:
Try out putting chargingSwitch=(gcpm/constant_charge_current_max 4000000 0 --) in /data/adb/vr25/acc-data/config.txt
It's been rock solid for me on my Pixel 6 Pro. You might have to run acc and test the available switches, it could've changed with the Pixel 7.
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What does this do? Limit the charge current to 4000 mA? I like learning what things do.
Which build of ACC are you using?

NCVol said:
What does this do? Limit the charge current to 4000 mA? I like learning what things do.
Which build of ACC are you using?
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Same build of ACC as you, and yes the that is 4A, rhe number is in microamps. This only sets the max charging current initially, it will try to readjust so you need to also set the maxChargingCurrent to whatever you want but that variable is based on milliamps.
I use 600000 and 600 for 600mA on my Pixel 6 Pro and it is a slow and steady charge. Worked out good on drives because it would hold my battery steady during navigation and didn't generate a lot of heat.

I just charge the phone to 100%. Take it off and use it. Never in my life did a battery fail, extreme degrade or fail to charge. No apps needed to monitor the battery either. Charging a battery to only 80% makes absolutely no sense. Over charging a battery and number of charge cycles eventually kills batteries. You charge a battery to only 80% vs someone who charges to 100%, who is going to have more charge cycles after a year?

schmeggy929 said:
I just charge the phone to 100%. Take it off and use it. Never in my life did a battery fail, extreme degrade or fail to charge. No apps needed to monitor the battery either. Charging a battery to only 80% makes absolutely no sense. Over charging a battery and number of charge cycles eventually kills batteries. You charge a battery to only 80% vs someone who charges to 100%, who is going to have more charge cycles after a year?
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To each his own but I think you have the concept of a charge cycle wrong. The last 20% is more of a charge cycle than the first 80%.

Ultimately you are going to keep your phone for... how long?
I charged my Pixel 2XL to 100% probably the majority of the time. My battery life was still 'good enough' to last 2 days based on my average usage 4 years later when I bought the p6p. Which I traded in for the P7P 10 months later (not a year because of the debacle the p6p 512 release was with supply). I suspect barring significant problems cropping up the 7 is a solid 3 year phone for me albeit admittedly with only 24 hours of time with it.
Does charging at a lower speed (less heat) and not charging it to full help elongate the battery life and help reduce degradation? Without a doubt the science says yes.
But ultimately it's more important if you're going to keep your phone for a few years. If you're going to swap out every 3 years or less, I don't know that you'll notice much.