Phone stopped charging with usual speed, accepting only 200-300 mA, instead of usual 1700-1800mA. (checked using ampere app)
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Hello my estimated charging time seems to be not working properly? It says Fast Charging @70% Estimated Charging Time 43 mins.
What's your estimated charging times? at any percentage so I could gauge mine if it has issues. Thanks!
I dont think this is a problem. When the phone is very low like 10% or so and you plug your charger in it will charge you up to around 50 - 70 very fast indeed. Once the phone is around 70% it then starts to slow down to a regular charging pace.
When I plug in my phone it says 1667 mA, after a minute it goes down to 1300 mA. Why is that? Using Galaxy Charging Current app
For starters you are leaving it a lot of info, like what is the battery level when you are doing that. Also while the screen is on you might show less of a charger rate than with the screen off.
Kinda weird but when I use a BlackBerry tablet charger (1.8A with 6ft fixed cord on them, have a lot of them for $4.99 ea) I get 1800mA which is higher than the charger that comes with the phone. I never use the charger that comes with the phone as a result.
Marshall1975 said:
I dont think this is a problem. When the phone is very low like 10% or so and you plug your charger in it will charge you up to around 50 - 70 very fast indeed. Once the phone is around 70% it then starts to slow down to a regular charging pace.
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Oh I see! Thanks! I'll try it out! So that's why its adaptive lol.
Sent from my SM-G920F using Tapatalk
Sometimes the charger doesn't charge, it charges but very slow, it goes almost into breakeven losing 100 mAh and then gaining 100 mAh, need to reconnect several times to detect and goes into full speed, happens to you?
Hi,
We are facing what seems like a weird charge current limiting behavior of the Android (or maybe Pixel?)
We are using Pixel 3XL as a sort of an embedded kiosk.
It is connected to a Windows10 PC (Intel NUC 8th Gen Core i5) through a powered USB hub. We use ADB to control the phone and our app from the Windows PC.
Our app running on Pixel is consuming a fair amount of juice, but the Phone is still charging while our app runs ... except ...
When we just plug in the Phone, and run the app - all is well, phone charges and reaches 100% fairly quickly. Then, if we leave it running (our app is still consuming the usual amount of juice) - sometimes, after many hours of being plugged in, the phone starts discharging while plugged in. If we reboot the OS on the phone, it starts charging again (with the app running still).
Another easy repro of the weird discharge behavior: If we let the phone charge fully to 100%, then, start our app - it starts discharging rapidly. Now, if we were to charge it only to say 70%, and started out app - it would keep charging, until it reached 100% and could stay there indefinitely. And then again, if we just kill our app, let the phone sit a bit, and start the app again - it starts discharging (reaches 0!)
I should mention that it does not matter if the USB hub is powered or not - once the phone starts discharging - it does not matter how much juice is available on the hub.
Any thoughts? Do you think this an Android thing? Or a Pixel 3 bug? ... I least suspect it to be a "Windows bug", but appreciate any suggestions!
Thanks!
The phone charges more slowly as it approaches 100%, I believe. It is my understanding that you cannot achieve rapid charging with an A to C cable, only C to C. I see you said it's on a USB hub but doesn't specify if it's an A/C or C/C cable. If it's rapid charging the charge is likely enough to overcome the draw of the app/screen, but once it slows down at/near 100% it charges more slowly and can't overcome it anymore? Could also be thermal throttling or similar if the app is that intense?
fury683 said:
The phone charges more slowly as it approaches 100%, I believe. It is my understanding that you cannot achieve rapid charging with an A to C cable, only C to C. I see you said it's on a USB hub but doesn't specify if it's an A/C or C/C cable. If it's rapid charging the charge is likely enough to overcome the draw of the app/screen, but once it slows down at/near 100% it charges more slowly and can't overcome it anymore? Could also be thermal throttling or similar if the app is that intense?
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Good points. It does not appear to be related to temperature. The phone is at ~42C throughout, and happily charges. Then it reaches a 100%, and if we stop our app, then start it - it starts discharging. Only full reboot helps (our app restart does not matter). The cable is A to C, but again, even with that connection, it would charge 10-15% an hour with our app running until it reaches 100%, and the whole "throttling" thing starts, which can result in discharge to 0.
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?
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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.
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
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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.