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Wireless charging not providing as much juice as charging via USB cable?

Does charging the phone via the Samsung official wireless stand (or any other wireless chargers) causes it to have "less overall capacity" on the battery compared to charging it via USB cable? E.g. Once charged to 100%, does wireless charging provide less capacity compared to charging it via USB cable?
Note that I'm not talking about charging speed or rate, I'm more interested to know about the battery's overall performance when charged using wireless vs cable.

Same
Sent from my SM-G935V using Tapatalk

Sorry, misread your question the first time.
No, 100% is 100%, whether you charge wired or wireless, fast charge or slow. The battery tells the phone when it's full, and the phone tells the charger to stop charging.

I always seem to have better battery when I use the plug instead of wireless.

psufan5 said:
I always seem to have better battery when I use the plug instead of wireless.
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Click to collapse
That's what i'm thinking! It's rather strange that this topic had never been raised before.
Anyone else?

Dark5tar said:
That's what i'm thinking! It's rather strange that this topic had never been raised before.
Anyone else?
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Click to collapse
I have both type of charger and use them daily. They feel the same.
Sent from My Galaxy S7 Edge

Tell you what I've always wondered but won't try it myself, what happens when you plug it in AND place it on a wireless charger!?
Sent from my SM-G935F using XDA-Developers mobile app

Got my wireless charging stand and it said it would take 2 hours, 20 mins to charge to 100% from 0 compared to 1 hour, 33 mins from plug

thegame261 said:
Got my wireless charging stand and it said it would take 2 hours, 20 mins to charge to 100% from 0 compared to 1 hour, 33 mins from plug
Click to expand...
Click to collapse
OP is not talking about charging speed of the 2 methods.
Sent from My Galaxy S7 Edge

TMobile S8 charging.

Is it just me or the S8 charge slow. I'm coming from a Note 5 and it charges pretty damn quick. Right now I'm at 53% and the phone says approximately 55 minutes till full.
Sent from my SM-G950U using Tapatalk

That sounds about right.
Fast charging is great when the phone is at a low percentage, as the percentage increases the charging speed decreases.
Overall charge from 0% should be 1 hour 30 minutes -ish or somewhere in that range.
Test it.

It definitely charges slow, my 8+ included. There's a conversation about it on the Samsung support forum. It's definitely not intended behavior, as it'll still charge slow at low percentages. It never reaches the 2000mA rate that it should.

benwalburn said:
It definitely charges slow, my 8+ included. There's a conversation about it on the Samsung support forum. It's definitely not intended behavior, as it'll still charge slow at low percentages. It never reaches the 2000mA rate that it should.
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Click to collapse
Based on my testing (I'll verify again tonight with pictures)
Quick charge 2.0/3.0
Screen on - 5v/1A
Screen off 9v/1.67A
USB C cable charging
Screen on 5v/1.5A
Screen off 9v/1.8A
The phones are QC 2.0 which means they're limited to I believe max 18 watts charging rate which would be 9v/2A with the screen off

ElBeaner said:
Based on my testing (I'll verify again tonight with pictures)
Quick charge 2.0/3.0
Screen on - 5v/1A
Screen off 9v/1.67A
USB C cable charging
Screen on 5v/1.5A
Screen off 9v/1.8A
The phones are QC 2.0 which means they're limited to I believe max 18 watts charging rate which would be 9v/2A with the screen off
Click to expand...
Click to collapse
2.0? Like the s6? Mine charges so much slower than my old s6. Took over 3 hours to charge 50% yesterday, screen off almost the whole time.

benwalburn said:
2.0? Like the s6? Mine charges so much slower than my old s6. Took over 3 hours to charge 50% yesterday, screen off almost the whole time.
Click to expand...
Click to collapse
Yeah Samsung for some reason did not activate QC 3.0 or even 4.0 on the S8(so stupid but seeing the NOte 7 battery issue, they're probably being cautious)
The S6 only had a 2550mAh battery vs the S8 that has a 3000mAh battery so yeah the S6 is definitely going to charge "faster"
Pick up a USB C multi-meter and see what the charger is outputting to your phone
This is the one I bought (I am not affiliated with them - just showing which one I purchased)
https://www.amazon.com/gp/product/B01MT8MC3N/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

Ok here are the results of the test. Pictures are captioned with details.
S8 charging test https://imgur.com/gallery/DYV9f

benwalburn said:
2.0? Like the s6? Mine charges so much slower than my old s6. Took over 3 hours to charge 50% yesterday, screen off almost the whole time.
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Click to collapse
3 hours to 50? Are you using the brick in the box? cable from the box?
That is not normal.

Skander1998 said:
3 hours to 50? Are you using the brick in the box? cable from the box?
That is not normal.
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Click to collapse
Stock brick and cable. The same thing happens with the brick and charger included in the wireless fast charging, and the wireless fast charger itself.

benwalburn said:
Stock brick and cable. The same thing happens with the brick and charger included in the wireless fast charging, and the wireless fast charger itself.
Click to expand...
Click to collapse
Go to settings, device maintenance, click battery, click the 3 dot menu (top right), select advanced settings and check if fast cable charging is enabled.

Skander1998 said:
Go to settings, device maintenance, click battery, click the 3 dot menu (top right), select advanced settings and check if fast cable charging is enabled.
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Click to collapse
Both are enabled and while charging it says it's fast charging. It even gives a reasonable charge time like 52 minutes, but even the estimate is off by a lot.

kraz01 said:
Is it just me or the S8 charge slow. I'm coming from a Note 5 and it charges pretty damn quick. Right now I'm at 53% and the phone says approximately 55 minutes till full.
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Click to collapse
Has anyone found and tried USB-C cables that support high-power 5a and for sale in the USA? https://www.startech.com/ca/Cables/usb-c/usb-c-usb-3-1-cable-power-delivery~USB31C5C1M

Samsung wireless convertible qi charger

I bought my wife the convertible charger and it says fast charging but for instance the phone is on 37% and it says 2 hours and 6 min to full charge. I plugged it into the wall at 37% and it says 1 hour 8 min. Any ideas? I will return if I can't fix it that is unacceptable
Sent from my SM-G955U using Tapatalk

Wireless charging isn't as fast as wired.
Never ever will be.
Sent from my SM-G955U using Tapatalk

djxn40 said:
I bought my wife the convertible charger and it says fast charging but for instance the phone is on 37% and it says 2 hours and 6 min to full charge. I plugged it into the wall at 37% and it says 1 hour 8 min. Any ideas? I will return if I can't fix it that is unacceptable
Sent from my SM-G955U using Tapatalk
Click to expand...
Click to collapse
First of all turn on Fast Wireless Charging. By default it's not on. You have to tap on the notification you get when charging starts. You are jumped to the charging settings and there you can activate it.
Second thing, Wireless charging is, as just said here, not as fast as wire in Fast Charging. Wireless Fast Charging should be something better then normal cable Charging (no Fast Charging).

Ok thanks. I returned it. I guess if that's the case I don't like wireless charging. And 90 bucks for something that's not fast charging sucks balls. Luckily I was on the 10th day of my 14 day trial
Sent from my SM-G955U using Tapatalk

PIRATA! said:
First of all turn on Fast Wireless Charging. By default it's not on. You have to tap on the notification you get when charging starts. You are jumped to the charging settings and there you can activate it.
Second thing, Wireless charging is, as just said here, not as fast as wire in Fast Charging. Wireless Fast Charging should be something better then normal cable Charging (no Fast Charging).
Click to expand...
Click to collapse
i looked like crazy but when i start charging, wireless or wired , when i tap charge, i choos advanced there i can only choose fast charge using cable
any ideas?

How long does your s8 take to charge full from around 5%?

I have the feeling my s8 doesnt really fast recharge even if it's enabled (i'm on 2nd charge now)... how long does it usually take you guys to charge it full when its very low, around 5%? And how long does it say it takes on the notification? Thanks!

About 1h50 or something with normal charge, not fast charge.

Duskfall89 said:
About 1h50 or something with normal charge, not fast charge.
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Click to collapse
Mine definately took longer to charge than that the 2nd time (the first one i was asleep so i dont know) and with fast charge. Does it matter which side you plug in the cable or it's the same? I'm getting worried.

The side of the cable does not matter. I normally charge my phone when it's about 15% and with normal charge it takes around 1h40. Next time I charge it around 5% I will check but I think it's about 1h50 to 2h. My S7 was definitely faster in charging.

Takes about 90 minutes with fast charge

Around an hour and 20-30 minutes, a bit slower when I'm using wireless fast charging.

Did you notice a substantial difference between normal charge and fast charge? Lat time I checked it was about 10 minutes difference until full charge. I expected more, it was much better on the S7.

I think that fast charging got capped by samsung after all the note 7 exploding battery horror stories. And it got capped at 2.45amp fast wired charging and around 1.35 with fast wireless charging since the nougat update on the galaxy s7. when it was around 2.8 fast wired and 1.8 fast wireless charging on MM
Beside the charging rate cap, the fone is much cooler while fast charging now as it used to get crazy hot reaching temps above 42c while now it never gets over 36.smthing.
So while its slower i guess its a much better bet for the battery health and your safety.
Normal wired charging didnt change between MM and nougat and its around 1.7~1.8amp
These are my findings using the s7 and s8 exynos international versions and the statments above are purely my own opinion and experience which could be different for everyone.

I noticed that mine never goes over 1060ma while charging using Ampere. It takes about 1 hour 40 minutes to "fast charge" but it is cooler than any other phone I've ever had while charging.
The sad thing is that it REALLY takes longer if you are using the phone, like barely increasing its %. I even tried changing cables, chargers and places but now I know I'm not alone and this is how it works.
I have an Exynos.

pakitos said:
I noticed that mine never goes over 1060ma while charging using Ampere. It takes about 1 hour 40 minutes to "fast charge" but it is cooler than any other phone I've ever had while charging.
The sad thing is that it REALLY takes longer if you are using the phone, like barely increasing its %. I even tried changing cables, chargers and places but now I know I'm not alone and this is how it works.
I have an Exynos.
Click to expand...
Click to collapse
IMO ampere is crap and slow to report, you need an app that can report as fast as cpufloat. As once you turn on the screen the charging rate will default to ~1amp regardless of the charging mode your using and thats when ampere starts to measure.
Use cpu float for info at glance
Or
Use accubattery to even help you distnguish which charging cables your using gives you the best charging rate.
Hope this helps

Vcaddy said:
IMO ampere is crap and slow to report, you need an app that can report as fast as cpufloat. As once you turn on the screen the charging rate will default to ~1amp regardless of the charging mode your using and thats when ampere starts to measure.
Use cpu float for info at glance
Or
Use accubattery to even help you distnguish which charging cables your using gives you the best charging rate.
Hope this helps
Click to expand...
Click to collapse
Back when I had my Galaxy S4 I used "CurrentWidget: Battery" which was really nice but is not working anymore so I installed Ampere.
I just tried both apps you mentioned and both gave me the 1050am right away. I'll try later on since I was at 90% and if I remember thats the point where it starts to throttle down the current.
I like the AccuBattery 80% cycle though, not sure I can really use it since I prefer to go with a full battery for the entire day.
Thank you!

Mine takes around 1hr 30 mins , The other night i turned fast charge off as i was going to leave it charge throughout the night but i actually forgot i had turned it off and had been charging for a few days with fast charge off..... surprisingly i noticed no difference! It still took around the same time to charge haha

Vcaddy said:
I think that fast charging got capped by samsung after all the note 7 exploding battery horror stories. And it got capped at 2.45amp fast wired charging and around 1.35 with fast wireless charging since the nougat update on the galaxy s7. when it was around 2.8 fast wired and 1.8 fast wireless charging on MM
Beside the charging rate cap, the fone is much cooler while fast charging now as it used to get crazy hot reaching temps above 42c while now it never gets over 36.smthing.
So while its slower i guess its a much better bet for the battery health and your safety.
Normal wired charging didnt change between MM and nougat and its around 1.7~1.8amp
These are my findings using the s7 and s8 exynos international versions and the statments above are purely my own opinion and experience which could be different for everyone.
Click to expand...
Click to collapse
You hit it on the nose. They slowed it to avoid the whole exploding battery problems just to play it safe. Also why they didn't cram a bigger battery inside it to keep heat down.
They lost a lot of money because of that. The only thing that really saved them was that some iPhones were blowing up too
Sent from my Samsung SM-G950U using XDA Labs

Hi all!
Takes around 1 h 40 mins for a full charge. This is using the Fast Charger that comes in the box.

Duskfall89 said:
About 1h50 or something with normal charge, not fast charge.
Click to expand...
Click to collapse
Don't you fast charge?
Sent from my SM-G955F using Tapatalk

thahim said:
Don't you fast charge?
Sent from my SM-G955F using Tapatalk
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Click to collapse
I don't see a big difference between fast and normal charging. I only fast charge when I'm in a hurry.
Gesendet von meinem SM-G950F mit Tapatalk

pakitos said:
Back when I had my Galaxy S4 I used "CurrentWidget: Battery" which was really nice but is not working anymore so I installed Ampere.
I just tried both apps you mentioned and both gave me the 1050am right away. I'll try later on since I was at 90% and if I remember thats the point where it starts to throttle down the current.
I like the AccuBattery 80% cycle though, not sure I can really use it since I prefer to go with a full battery for the entire day.
Thank you!
Click to expand...
Click to collapse
Bear in mind that the charging rate will default to 1050ma whenever the screen is turned on no matter what charging mode your using.
To use my method in cpufloat app, open the app n keep it floating on your screen. Turn of the screen for awhile ( lets say 5 seconds) and n turn the screen back on. You will have a split second to read the current before it updates to the 1050ma. ( you can slow the update rate in the app settings btw.
Accubattery will have 2 readings, charging rate when screen on, charging rate with screen off.

Vcaddy said:
Bear in mind that the charging rate will default to 1050ma whenever the screen is turned on no matter what charging mode your using.
To use my method in cpufloat app, open the app n keep it floating on your screen. Turn of the screen for awhile ( lets say 5 seconds) and n turn the screen back on. You will have a split second to read the current before it updates to the 1050ma. ( you can slow the update rate in the app settings btw.
Accubattery will have 2 readings, charging rate when screen on, charging rate with screen off.
Click to expand...
Click to collapse
Yup, I noticed that, thanks!
Accbattery showed me a maximum of 1156ma obviously it was charging with the screen off. From there my test starts since this charge was done using a multi-usb charger and had something else charging and wasn't using the original cable. We will see
Thanks once again!

Duskfall89 said:
I don't see a big difference between fast and normal charging. I only fast charge when I'm in a hurry.
Gesendet von meinem SM-G950F mit Tapatalk
Click to expand...
Click to collapse
What other difference you want?

The charging issues on the Galaxy S8 seem to be widespread. I was hoping the most recent software update would help resolve these issues but it hasn't. Extremely slow charging (71% charged, 3 hrs 17 mins to 100%) and random connectivity (wireless charging paused) with Samsung's OEM wireless charger. What I've found with respect to the wireless issue, if I leave the phone on the charging pad after a few minutes it will eventually engage to a slow charge mode. Direct charging with the Samsung 2.0 Adaptive makes no difference, still a very slow charge. The normal Fast Charge Notification which should appear at the bottom of the display has never appeared and the tab remains grey in the Advanced Battery Settings even when enabled. Prior to purchasing the phone I had read and was advised by a Samsung tech the phone was suited to accept Qualcomm's 4+ Quick Charge. That seems unlikely at this point. Just got off a live chat with Samsung Support, not surprising the tech offered no solutions which I hadn't already experimented with. Booting up in Safe Mode to see if the app(s) were the problem, clearing system cache, app cache, using a variety of adaptives and cables, updating software, checking the C jack for connectivity. The S7 Edge I had previous to the S8+ was a great phone, no problems whatsoever. I honestly feel that Samsung is dragging their feet and haven't yet gotten their hands around these issues. Seriously, do they really want to experience another wide ranging battery concern? I think not. I can get a refund or replace the S8+ (SM-G955FD) but I'm wondering if the problems may be so widespread it could easily be an issue with the replacement phone. From the research I've done these issues are popping up on all models, regardless of the manufactures location.

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 Samsung Galaxy Z Fold 2 can charge. A higher rating indicates that it charges extremely fast.
Then, drop a comment if you have anything to add!

My phone arrived with 54% charge. It took about 40min to charge to full. Will do some more complete testing over the next few days.

The charge speed is something im a bit concerned about. I've noticed charging while the phone is on significantly slows down the charging process. To the point where 10 minutes went by on "super fast charging" and the phone only increased 1% in charge. The minute I laid the phone down screen off and the charging went significantly faster.
Sent from my SM-F916U1 using Tapatalk

Yes because if your using the phone or the phone screen is on your consuming battery life while your charging so it's going to be slower charging than if the screen was off.

seanbwoi said:
Yes because if your using the phone or the phone screen is on your consuming battery life while your charging so it's going to be slower charging than if the screen was off.
Click to expand...
Click to collapse
The issue i have is my note 10+ didn't have this issue nor any phone I've ever used. I could be gaming on my note and it would charge normally.
Sent from my SM-F916U1 using Tapatalk

Didn't the note 10+ have a 45 watt charging right? If you had the charger you probably wouldn't notice it

8% to a full charge took 1hr 15min. Haven’t tried charging while using the device at the same time yet.

JSK0703 said:
8% to a full charge took 1hr 15min. Haven’t tried charging while using the device at the same time yet.
Click to expand...
Click to collapse
If you end up trying it, post your results here please, I'm quite curious. Thanks!
Sent from my SM-F916U1 using Tapatalk

desantim said:
If you end up trying it, post your results here please, I'm quite curious. Thanks!
Sent from my SM-F916U1 using Tapatalk
Click to expand...
Click to collapse
I tried a quick test by running the battery down to 90% and then launching a game on the big screen. (Clash Royale) Plugged in the charger while playing and it topped off in just a few minutes. Going to run it down to 50% tonight and repeat the test.
Sent from my SM-F916U using Tapatalk

Repeated the test, this time I had the battery at 55%. Played WGT Golf while charging. Default settings which had screen brightness are 30%. Battery topped off in 46 min.
Sent from my SM-F916U using Tapatalk

JSK0703 said:
Repeated the test, this time I had the battery at 55%. Played WGT Golf while charging. Default settings which had screen brightness are 30%. Battery topped off in 46 min.
Sent from my SM-F916U using Tapatalk
Click to expand...
Click to collapse
Thank you for the tests, I'll have to take a look and see if it's just me, the charger or the phone.
Sent from my SM-F916U1 using Tapatalk

Charging is not that fast and im using the 40w samsumg charger

xavierxxx2p said:
Charging is not that fast and im using the 40w samsumg charger
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Click to collapse
The phone only charges at 25 watts max

For some reason my phone is taking 6hrs to fully charge from zero on the Samsung fast charging dual pad. What is going on?

I hooked up my USB c gizmo.... only saw max 18w charging using a variety of cables and chargers with fold 2. I'm coming from a note 10+ where I saw 45w max. What gives?

lynseyw said:
For some reason my phone is taking 6hrs to fully charge from zero on the Samsung fast charging dual pad. What is going on?
Click to expand...
Click to collapse
Has the charging pad been used to charge other devices and worked as it should? Is the pads own plug and cable being used as they could determine the charge speed too.
On the Fold 2, is fast wireless charging enabled? If you go to the Battery settings in Device Care at the bottom there's Charging. Make sure both Fast Charging and Fast Wireless Charging are on. You can schedule the fast wireless charging to turn off at night so it charges more slowly and, if the charger is compatible, the charging light dims and the cooling fan doesn't turn on.
I only charge wirelessly using the Samsung 15w wireless charging stand and have the Fold 2 scheduled to turn off Fast charge at night. This turns off the chargers fan and dims the light.

All of that is checked. My note 10+ was fine. This is slow as ****. Not the pad. Watch does fine etc. It charges at 12w. Oh well. I guess if I want it fast I'll just have to plug it in.
Sent from my SM-F916U using Tapatalk

lynseyw said:
All of that is checked. My note 10+ was fine. This is slow as ****. Not the pad. Watch does fine etc. It charges at 12w. Oh well. I guess if I want it fast I'll just have to plug it in.
Sent from my SM-F916U using Tapatalk
Click to expand...
Click to collapse
I have the same issue. Wireless charging has been abysmal at best.
Sent from my SM-F916U1 using Tapatalk

Glad it's not just me. Still love the phone. I usually charge it when I'm sleeping so it's fine. Might have to give it a refresh cable charge before bed so it's not at zero when I go to bed.
Sent from my SM-F916U using Tapatalk

lynseyw said:
Glad it's not just me. Still love the phone. I usually charge it when I'm sleeping so it's fine. Might have to give it a refresh cable charge before bed so it's not at zero when I go to bed.
Sent from my SM-F916U using Tapatalk
Click to expand...
Click to collapse
It's definitely a new experience for me with the charging. I came from a oneplus 7 pro to the note 10+ to this and those could go from dead to full in under 40 minutes. This phone is much slower charging overall. I Def. Don't regret buying it, i just wish it came with a cheap case to get me by until good ones were out and the charging was on point.
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