No fast charging while using the N20U - Samsung Galaxy Note 20 Ultra Questions & Answers

No fast charging while using the N20U - Samsung Galaxy Note 20 Ultra Questions & Answers

Hello,
I am getting the super fast charging only while the screen is locked. If I am using the device while it's charging, charging is not so fast.
It says super fast charging but it doesn't charge so fast.
Is it just my device or others facing the same issue?

enjoylife1788 said:
Hello,
I am getting the super fast charging only while the screen is locked. If I am using the device while it's charging, charging is not so fast.
It says super fast charging but it doesn't charge so fast.
Is it just my device or others facing the same issue?
Click to expand...
Click to collapse
This is turned off by default. View attachment 5105611
Sent from my BlackBerry Bold 9900

I have turned it on. But what I am talking is that it works when the phone is not in use.
Same charger while phone is in use the charging is slow.
Same charger while the phone is sleep mode, the charging is super fast.

This is normal to avoid over heating of battery while in use.

You can't have the screen on for fast charging, you can listen to music with bt though while fast charging.
Having the screen on disrupts the charge curve (it defaults to slow charging) and it's best practice not to do this.
•Start charge at 30-40% then let charge to 60-80%
To get a 20% charge in that range only takes about 10 minutes! Li's love to be used like this; short charge/use cycles do not degrade them like NiCads.
There is a known slight memory effect with Li's so periodically cycle them through a wider charge range.
•Never charge cell below freezing, best if cell temp is 80 F to 95 F. At 80 F or below plating can occur which would permanently degrade the cell.
Charging above 70% degrades the battery faster, above 90% the charging slows and the higher cell voltage degrades it even faster.
•Avoid charging to 100% except if you need to or to periodically do a full charge cycle.
Heat and high cell voltage are the killers of Li cells. By avoiding charging beyond 80% and high temperatures you can increase the battery lifespan by hundreds even thousands of full charge cycles.
A 20% is not a full charge cycle; 6%-100% is.
Five 20% charges would be roughly the equivalent of a full charge cycle in power but far less is cell degradation.
•Avoid discharging below 20%, 30% is better.
After 20% there's much less usable energy; the phone uses a constant 5 volts. The phone's voltage converters trade off milliamps for voltage and use more milliamps for converting lower cell voltage.
Volts x Amps = watts.
The phone's voltage and wattage requirements are constants. So at lower cell voltage the phone draws more milliamps to supply these; the battery provides less watt hours than at higher battery voltage levels.
So take a 10 minute break every 2 hours or so and let it fast charge during the break.

Related

[JB]Improve Battery Life (ICS not tested)

Hi everyone,
I found a way to improve battery life of our phone. We just charge our phone with usb cable in usb mass-storage mode.
Let it full charge and enjoy strongly battery life. It worked for me and after that you didnt need to charge with cable again just do normal charge with adapter.
Just tested with my phone CM10 A2. Battery drain about 2%(6hrs didnt do anything).
Enjoy!

Try reboot your phone and see your battery drain or not
Sent from my GT-I9003 using xda app-developers app

Lol, no difference at all, you probably just did enough cycles for it to adjust, battery life depends on your usage really.. and this is not a 'fix'.
@Ave666, rebooting will always take your battery down, it will slowly ramp to the correct value again after a few minutes.

Skander1998 said:
Lol, no difference at all, you probably just did enough cycles for it to adjust, battery life depends on your usage really.. and this is not a 'fix'.
@Ave666, rebooting will always take your battery down, it will slowly ramp to the correct value again after a few minutes.
Click to expand...
Click to collapse
Hello all,
There is a drop of true. According to battery's chemistry, it's better to charge with lower amperage. Usual USB port provides 500mAh, ordinary charger 750 to 1000mAh.
Of course, charging via usb takes longer, but battery packs a little more voltage. If you have some app, witch checks battery voltage, you can check it. Read more
http://www.powerstream.com/li.htm
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
http://electronics.howstuffworks.com/everyday-tech/lithium-ion-battery.htm

cukierkas said:
Hello all,
There is a drop of true. According to battery's chemistry, it's better to charge with lower amperage. Usual USB port provides 500mAh, ordinary charger 750 to 1000mAh.
Of course, charging via usb takes longer, but battery packs a little more voltage. If you have some app, witch checks battery voltage, you can check it. Read more
http://www.powerstream.com/li.htm
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
http://electronics.howstuffworks.com/everyday-tech/lithium-ion-battery.htm
Click to expand...
Click to collapse
Either way, won't 'magically' make a difference from the first charge, that is used to preserve the battery, and not make it magically last longer.. lol.

cukierkas said:
Hello all,
There is a drop of true. According to battery's chemistry, it's better to charge with lower amperage. Usual USB port provides 500mAh, ordinary charger 750 to 1000mAh.
Of course, charging via usb takes longer, but battery packs a little more voltage. If you have some app, witch checks battery voltage, you can check it. Read more
http://www.powerstream.com/li.htm
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
http://electronics.howstuffworks.com/everyday-tech/lithium-ion-battery.htm
Click to expand...
Click to collapse
So you mean to say lower mA battery charger is good for battery health?? I have observed that 1A battery quickly charges battery but also rises temperature of phone as well as battery drian is little bit higher.

I don't think that it makes a real difference. Charging our battery (1650 mAh) with a normal charger at 1A current is fine as it's charing with 0.6C. The charger automatically stops charging when the voltage of your Li-Ion cells have reached the wanted voltage AND the current has gone low (about 5% or a bit less; depends on charger). Much more important is that you don't stress your battery too much, so that the capacity doesn't decease that fast.
Never deep discharge Li-Ion batteries. This kills your battery (Should not happen as phone automatically turns off, but then don't try to turn it on again)
Avoid full full charges. Sounds silly, but voltage related stress is lower which is good for your battery health.
(Thats the reason, why I store my Li-Po batteries for my RC helicopter at 40%-50% charge at the end of summer)
Remember: Bad battery health = low capacity = poor battery life = quickly discharged phone
Charge often to keep your battery at a medium charge level, which is best for your batteries.
Li-Ion batteries dont know the "memory effect". Partly charging and discharging is no harm.

Vishal, mainly, yes. I'm charging usually via USB.
Sent from my GT-I9003

vishal24387 said:
So you mean to say lower mA battery charger is good for battery health?? I have observed that 1A battery quickly charges battery but also rises temperature of phone as well as battery drian is little bit higher.
Click to expand...
Click to collapse
Technically, the slower the charge the better it is, but the difference is very, very very unnoticeable..

Skander1998 said:
Technically, the slower the charge the better it is, but the difference is very, very very unnoticeable..
Click to expand...
Click to collapse
Regards that "unnoticable": Are you saying that in general as you did for the fact before? I'm asking because charge currents greater than 0.85-1C with standard Li-Ion batteries cause a noticable effect.
I have tested some Li-Po batteries with different charge currents, as they where cheaper than the ones I am using for my helicopters. The one that I have charged with 0.75C behaved quite fine, while the one with 1.25 C didn't like that charge currents very much.

Taraen said:
I don't think that it makes a real difference. Charging our battery (1650 mAh) with a normal charger at 1A current is fine as it's charing with 0.6C. The charger automatically stops charging when the voltage of your Li-Ion cells have reached the wanted voltage AND the current has gone low (about 5% or a bit less; depends on charger). Much more important is that you don't stress your battery too much, so that the capacity doesn't decease that fast.
Never deep discharge Li-Ion batteries. This kills your battery (Should not happen as phone automatically turns off, but then don't try to turn it on again)
Avoid full full charges. Sounds silly, but voltage related stress is lower which is good for your battery health.
(Thats the reason, why I store my Li-Po batteries for my RC helicopter at 40%-50% charge at the end of summer)
Remember: Bad battery health = low capacity = poor battery life = quickly discharged phone
Charge often to keep your battery at a medium charge level, which is best for your batteries.
Li-Ion batteries dont know the "memory effect". Partly charging and discharging is no harm.
Click to expand...
Click to collapse
nice info thx.

[Q] Fast charge battery

I usually let it charge over night. However I found today it is charged very fast: less than 2hours from 30% to 100%. I used galaxy note 2 usb charger. Do you have the same experience of charging or my battery has problems?

yes i same with you

When your battery was at 30%, it means the charger had to charge 1610mA (30% of 2300mA is 690mA). The Galaxy Note 2 charger has an output amperage of 2000mA. So you can imagine it won't take very long.
[update] Hm I misread note for tab. I have a tab 2 with a 2A charger. Not sure what the note 2 charger can output, but I'm guessing it will be above average.

Petrovski80 said:
When your battery was at 30%, it means the charger had to charge 1610mA (30% of 2300mA is 690mA). The Galaxy Note 2 charger has an output amperage of 2000mA. So you can imagine it won't take very long.
[update] Hm I misread note for tab. I have a tab 2 with a 2A charger. Not sure what the note 2 charger can output, but I'm guessing it will be above average.
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Click to collapse
Thanks. I will check the output of note 2 usb charger and do the math.

Stock Nexus 5 charger also charges it from 0 to 100% in less than 2 hours.

Dont forget that the devices kernel determines how much mA is drawn from a charger and not how much may a charger is rated for
-----------------------
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I do NOT reply to support queries over PM. Please keep support queries to the Q&A section, so that others may benefit

Not all milliamps are the same
It seems to be a common misconception that the number of milliamp-hours of your battery and the milliamp rating of your charger have a fixed relationship.They don't. It does not automatically follow that a 2000mAh battery will take 2 hours to charge from a 1000mA charger, or that the charge current will be 1000mA. Charge current can easily - and safely - be higher than the mA rating of the charger. Or lower.
The N5 battery is rated at 3.8V 2300mAh (typical) and, crucially, 8.74 watt hours. A 5V 1000mA charger can supply a maximum of 5 watts (5 volts x 1 amp). Voltage converters within the N5 change this 5 watts of power from 5V to 3.8V to suit the battery - and this could be at about 1250mA (assuming a not-unreasonable 95% conversion efficiency).
The battery voltage varies with the state of charge, reaching about 4.2V when fully charged. Even then, the charge current could be as high as 1130mA without drawing more than 1000mA from the 5V charger.
An earlier poster pointed out that charging is under control of the CPU (I suspect instead a dedicated charging circuit but that's irrelevant) and it is very likely that a) the charging current varies significantly during the charging cycle and b) it is unlikely that the charging circuit demands precisely the maximum that the charger can supply. But it is quite likely that the actual current being put into the battery is numerically higher than that being drawn from the source. It's the power in watts that counts, not the number of milliamps.
Batteries are not perfect, meaning you don't get out all you put in. If the battery was completely flat you would have to put in more than 8.74wh in to bring it up to full charge (although a totally flat Li-ion battery is dead beyond redemption; the battery life shown on the screen is the useable life, not ultimate power capacity).
Sometimes the charger rating, battery capacity and charge time seem to line up, but that's more due to a happy accident than anything else. A 40,000mA charger won't juice your phone from flat in four minutes!
Batteries, and charging, are complex...

G1MFG said:
It seems to be a common misconception that the number of milliamp-hours of your battery and the milliamp rating of your charger have a fixed relationship.They don't. It does not automatically follow that a 2000mAh battery will take 2 hours to charge from a 1000mA charger, or that the charge current will be 1000mA. Charge current can easily - and safely - be higher than the mA rating of the charger. Or lower.
The N5 battery is rated at 3.8V 2300mAh (typical) and, crucially, 8.74 watt hours. A 5V 1000mA charger can supply a maximum of 5 watts (5 volts x 1 amp). Voltage converters within the N5 change this 5 watts of power from 5V to 3.8V to suit the battery - and this could be at about 1250mA (assuming a not-unreasonable 95% conversion efficiency).
The battery voltage varies with the state of charge, reaching about 4.2V when fully charged. Even then, the charge current could be as high as 1130mA without drawing more than 1000mA from the 5V charger.
An earlier poster pointed out that charging is under control of the CPU (I suspect instead a dedicated charging circuit but that's irrelevant) and it is very likely that a) the charging current varies significantly during the charging cycle and b) it is unlikely that the charging circuit demands precisely the maximum that the charger can supply. But it is quite likely that the actual current being put into the battery is numerically higher than that being drawn from the source. It's the power in watts that counts, not the number of milliamps.
Batteries are not perfect, meaning you don't get out all you put in. If the battery was completely flat you would have to put in more than 8.74wh in to bring it up to full charge (although a totally flat Li-ion battery is dead beyond redemption; the battery life shown on the screen is the useable life, not ultimate power capacity).
Sometimes the charger rating, battery capacity and charge time seem to line up, but that's more due to a happy accident than anything else. A 40,000mA charger won't juice your phone from flat in four minutes!
Batteries, and charging, are complex...
Click to expand...
Click to collapse
This. Well said.

Your suspicions are correct, it does have a dedicated charging circuit. This chip is responsible for charging. Input current appears to be capped at 1200mA. Measured with my DMM last night and never saw the phone draw more than 960mA when charging with the screen off. It stayed like that until the battery was around 95% charged, then gradually tapered off from there as the battery reached 100%.

Can anyone recommend an app that shows real time current draw? It would also be cool if the app showed how much power the phone is using in real time.
Sent from my Nexus 5 using Tapatalk

Today's batteries are much improved
wolfca said:
Thanks a lot. It did look complicated. As long as the fast charging is normal, I don't worry too much.
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Click to collapse
That's the ticket. When used with the correct charger, a modern phone battery takes a couple of hours to charge fully, a bit longer with a lower-rated charger. Or you can top up a bit if you have a few minutes spare. It's much better than the early mobiles with Ni-Cd batteries that took overnight to charge. And required weightlifting training before you could even pick them up!

Battery lasts longer after normal recharging than turbo charging

Hi,
I noticed that when I recharge it with a charger that is only 650ma the battery last much longer than with turbo charger that came with the phone.
Even in standby after recharged it takes one hour to consume only 1% but after turbo recharging it takes about 10 min to drop 1%.
Is there anyone experiencing something like that?

Funny it is.... The case is opposite for me... Although I use Transomart QC 2.0 charger. My battery lasts longer when I charge it with quick charger compared to standard 1 Amp chargers.

That´s so weird.
I am preparing a comparison to figure out what's happening.

It happens the same here. I've a Aukey turbo charger and the battery drains faster

pesimeao said:
It happens the same here. I've a Aukey turbo charger and the battery drains faster
Click to expand...
Click to collapse
I also got Aukey and it's the same

There's no way to actually know the charge (in mAh) of a battery without draining the battery. The way that phones estimate the charge is by measuring the voltage of the battery. Quick Charge 2.0 (supported by the Moto X 2014) uses a higher voltage to charge the battery faster. This can make the battery hit max voltage before it is actually fully charged. That is why Quick Charge always advertises how quickly it gets to 80%. To get to full charge (not just when it shows 100%, but when it is actually fully charged) will take about the same time as a standard charger.

Heat and Turbo charge destroys your battery.

if i turbo charge , my phone will suddenly die when it's between 10-20%. W/ regular charging I get sudden death at 6-8%

i use a moto razr 850mah charger and solved the 8% sud power off, took 2 charge cycles from death to 100% leaving it overnight. Now battery works as it should

.
As I've been reading around (can't recall specific scientific data), the faster you charge the battery, the less capacity it can hold. So it makes sense that it lasts longer if you charge it slowly. I don't know how much would be the difference tho.

It is normal in my opinion. Slower charging is also healthier for the battery and usually will last longer

Has anyone ever used a wireless charging pad with the phone. I bought a stick-on one from amazon and it charges fine,,,slower but fine. However, I noticed that it tends to get suck at certain levels and if I take off the wireless charger at say 89 percent,,,it takes less than a min to go to 100 percent charged?

Recomendeed is charge with Motorola original charger of this device, i mean 1150mAh dual port charger

Anyone here with experience of using Motorola's Turbopower 15 wall charger? I'm thinking to buy one, because waiting for 1 hr to charge to 100% is quite annoying.

Battery Estimate declined significantly seemingly after using USB headset adapter.

So I got an adapter to use a wired headset with my phone, it's one of those that allows for both headphone use and charging, though you need to plug in both, but I notice after I tested them out, my estimated battery drain declined all the way down to 9 hours remaining from a charge of 89 percent.
It used to be anywhere from 23 hours to a whole day, did I just break my battery? I'm not in a position where i can replace it if it goes wrong, especially since I just got this a month ago.
Checked it and it doesn't show any apps sucking power, I also disabled various bloatwares to make sure it would run smoothly.
I only had this phone since December and I made sure to charge it when needed, keeping it at around 40-80% charge as much as I could.
Phone is a OnePlus 8 5G, battery drain before was about a whole day before I needed to charge unless I were watching videos, and even with that it still lasted a good while.

It's not a good idea to use and charge the phone as it disrupts the charging curve*. If the screen is off and the device power usage is minimal like listening to music on bt does not interfere with normal charging, at least on my 10+.
Give the phone it's quiet time to charge.
Limit charges to 80% preferable 70% and discharges to 30% preferably 40% to maximize battery life.
Avoid going under 20% or full charges to 100% as it needlessly stresses the battery.
Li's love short, frequent midrange usage like from 40-65%
Li's hate high heat (>100°F) and high cell voltages ie >90% charge.
Avoid charging below 72°F as it can cause Li plating which will permanently degrade it.
Never attempt to charge if below 32°F.
*if you're drawing power whilst charging the device you can not gauge its actual battery capacity. It will charge much slower or maybe not at all.
Stop that you!
Take a 10 or 15 minute break and let get it take a charge.

blackhawk said:
It's not a good idea to use and charge the phone as it disrupts the charging curve. If the screen is off and the device power usage is minimal like listening to music on bt does not interfere with normal charging, at least on my 10+.
Give the phone it's quiet time to charge.
Limit charges to 80% preferable 70% and discharges to 30% preferably 40% to maximize battery life.
Avoid going under 20% or full charges to 100% as it needlessly stresses the battery.
Li's love short, frequent midrange usage like from 40-65%
Li's hate high heat (>100°F) and high cell voltages ie >90% charge.
Avoid charging below 72°F as it can cause Li plating which will permanently degrade it.
Never attempt to charge if below 32°F.
Click to expand...
Click to collapse
I don't use it when it's charging, it's a OnePlus with warp charging so I let it sit until it's either full or usually at around the 80 range.
It seemed fine until I tried using this headset adapter, I don't know if these can break the battery in any way so i don't know if just using this messed something up.

MarkiMarko2221 said:
I don't use it when it's charging, it's a OnePlus with warp charging so I let it sit until it's either full or usually at around the 80 range.
It seemed fine until I tried using this headset adapter, I don't know if these can break the battery in any way so i don't know if just using this messed something up.
Click to expand...
Click to collapse
If you have fast charging just use the standard fast charging cable to charge it not the daul use one.
The latter may not be recognized by the phone for fast charging, if so it will default to slow charging.

blackhawk said:
If you have fast charging just use the standard fast charging cable to charge it not the daul use one.
The latter may not be recognized by the phone for fast charging, if so it will default to slow charging.
Click to expand...
Click to collapse
Warp Charging works yeah, I'm returning the headset cable and replacing it, since i don't know if it messed my system up, and aside from that it's clunky to use.
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It was this thing.
do you think my battery is just messed up at this point or is it fine? Battery estimates used to show 23 hours to a whole day, but now it's down to 9 hours so I don't know if that messed up my battery somehow.

I doubt it messed up the battery especially if it's been only a week or whatever.
More than likely it's a misbehaving apk(s) causing the drain.
If your battery's rated capacity is 1000 mAh and you're only getting 400 mAh out of it, then you have a battery issue. How long it can run doesn't reflect battery condition unless the load is the same as before. So you need to scrutinize it further before making the assumption the battery has deteriorated.
I use two overlay apks (Accubattery is one) that let me see total current draw in near real time. I'm running Pie and doubt these will run in Q.
At idle my draw is an average of 150 ma or so with lows going down to 79 ma. If I see it averaging 300 ma with spikes going to 800 ma at idle I go looking for the cause.

Samsung S10 only charges to 4.225 mV while turned on and upto 4.3 mV when turned off

i have a samsung galaxy s10 and somehow i notice that the charging speed is blazing fast from 89% to 100%. Then i monitor the peak voltage using AIDA64 and Accubattery. When my phone reached 100% it shows the voltage of 4.225 mV, i read that S10 supposed to charge upto 4.285 mV. After that i tried calibrating the battery by discharging it until my phone turned off by itself then charge to 100% while turned off and it shows 4.3 mV after i turned in on. What is happening to my phone and should i be worried about it?

In fact fast charging ramps down at about 80% then again around 90% in order to protect the battery. Excessive cold temperatures will cause fast charging not to engage.
You can't accurately measure Li charge level voltage or fast charge with the display on. If the display is on the power controller senses the excess power usage and ramps down fast charging. It will charge slowly at best.
To measure the voltage with Accubattery have the window open then turn off the display. When you turn it on you have about a second to see the voltage as it samples around every second or so.
It will immediately drop down then.
Depending on temperature, current draw and battery condition it may limit the top charge.
Fast charging to 100% stresses the battery needlessly as does constantly discharging below 20%. Li's prefer frequent midrange power cycling ie 40-72%. High cell voltage and temperature are their enemies. High discharge rates also can accelerate their degradation by driving up temperature.
Ideal minimum start charge temperature for fast charging is about 82F, minimum is 72F. If below about 55F fast charging will not engage for that charge cycle.
Cold charging Li's can cause Li plating which will permanently degrade the cell, a oid doing this!
NEVER attempt to charge an Li that is near freezing temperature

So thats the reason why my phone once dropped its percentage from 30% to 5% in an instant after having it in front of my car air conditioner. But is there a reason why my phone charged very fast from 89% to 100%?

It shouldn't drop that fast! Or charge faster near full charge. This is atypical performance.
You using the Samsung 25w brick and cable?
Erratic fast charging is a sign of a battery failure. Any swelling is a battery failure, replace asap.

Im using samsung 15w fast charging and btw i have replaced the battery around 5 months ago and i notice the fast charging speed only recently. Samsung didnt reset mt battery cycle when replacing the battery tho

Fixt1772 said:
Im using samsung 15w fast charging and btw i have replaced the battery around 5 months ago and i notice the fast charging speed only recently. Samsung didnt reset mt battery cycle when replacing the battery tho
Click to expand...
Click to collapse
You need the 25 watt Samsung brick and cable.
15 watts will slow fast charging down if it works at all. If fast charging it should add about 2%@minute for 4100mAh battery in the 20-70% charging range.

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