S25u 45w Charger Is Faster

[mustang7757]

So it use to be that if you used the Samsung 45w Charger u needed the 5amp charging wire to get Fast charging 2.0 , this has changed on the s25 where you could use the cable that came with the device that was rated at 25w with the 45w to get the Super Fast charging 2.0 which in the video explains you get the blue icon instead of green

 

[tcdude]

So it use to be that if you used the Samsung 45w Charger u needed the 5amp charging wire to get Fast charging 2.0 , this has changed on the s25 where you could use the cable that came with the device that was rated at 25w with the 45w to get the Super Fast charging 2.0 which in the video explains you get the blue icon instead of green

I just saw this video myself very interesting

 

[mustang7757]

I just saw this video myself very interesting

Yeah definitely

 

[BerryBubbles]

So it use to be that if you used the Samsung 45w Charger u needed the 5amp charging wire to get Fast charging 2.0 , this has changed on the s25 where you could use the cable that came with the device that was rated at 25w with the 45w to get the Super Fast charging 2.0 which in the video explains you get the blue icon instead of green.

Nice! Those 5amp cables take up a lot of space.... well at least, I think they do!

 

[mustang7757]

Nice! Those 5amp cables take up a lot of space.... well at least, I think they do!

I don't think they do, a little thicker than the 25w cables

 

[SyCoREAPER]

I use Ankers charger and cables. I'm not listing the exact models because I don't want endorse the brand. They've gone downhill over the years IMO.

That said there is good reason to use the official Samsung one. Mainly if you ever let your devices battery hit 0 and shut down, the Anker ones can't always start the intital charge.

Anyway, my experience has been off you only charge to 80% (as you should be), the 45w is lightning fast compared to 25w. It's during the final 20% that is most stressful for the battery and where both chargers actually throttle and will take the same amount of time for a 0-100 charge.

@mustang7757 FYI the owner made the video private so I'm only speculating on my experiences as I can't see what the video demonstrated.

 

[mustang7757]

He demonstrated that in past the Samsung official 45w charger would only super fast charge 2.0 with 5amp cable that was provided with the charger but now he mentioned that 45w charger even with a 25w cable can still do super fast charging 2.0

 

[BerryBubbles]

I don't think they do, a little thicker than the 25w cables

It's probably me comparing apples to oranges. My black OEM 5a cables are 72" long & not very pliable. My longest 3a cable is 47", thinner, and of course, very pliable. So the thickness of the 5a cables just takes more room ... for me. I even combined two 40" 3a cables together & it still took up less space ... for me. So aapples to oranges my friend ...

 

[mustang7757]

It's probably me comparing apples to oranges. My black OEM 5a cables are 72" long & not very pliable. My longest 3a cable is 47", thinner, and of course, very pliable. So the thickness of the 5a cables just takes more room ... for me. I even combined two 40" 3a cables together & it still took up less space ... for me. So aapples to oranges my friend ...

View attachment 368284

You have a collection

 

[BerryBubbles]

You have a collection

You have no idea!

And yet ... not one short 5a cable ...

 

[mustang7757]

You have no idea!

And yet ... not one short 5a cable ...

Nothing wrong with that

 

[SyCoREAPER]

He demonstrated that in past the Samsung official 45w charger would only super fast charge 2.0 with 5amp cable that was provided with the charger but now he mentioned that 45w charger even with a 25w cable can still do super fast charging 2.0

USB-PD does allow 60w over 3amp cables, which mathematically obviously means the charger will go up to 15v leaving no flexibility outside of safety features shutting it off or lowering the wattage. (Fixed)

With 5amp cables it allows the charger to fluctuate between 9v-15v (or higher) as such allowing the charger to vary it's output to achieve 45w (PPS).
I say or higher as the charger could potentially/theoretically go over 45w to overcome a damaged or aged battery.

That said it'd be uncomfortable running a 3amp cable. The resistance will be higher and as such that charger better have perfect and functional shutoff protection because higher resistance means warmer cables, higher fire potential.

Not giving YOU a electrical lesson, just my thoughts based on what you explained the video demonstrated. So I don't doubt the videos claims, I just wouldn't play that game and thought id explain it for anyone considering it.

 

[mustang7757]

USB-PD does allow 60w over 3amp cables, which mathematically obviously means the charger will go up to 15v leaving no flexibility outside of safety features shutting it off or lowering the wattage. (Fixed)

With 5amp cables it allows the charger to fluctuate between 9v-15v (or higher) as such allowing the charger to vary it's output to achieve 45w (PPS).
I say or higher as the charger could potentially/theoretically go over 45w to overcome a damaged or aged battery.

That said it'd be uncomfortable running a 3amp cable. The resistance will be higher and as such that charger better have perfect and functional shutoff protection because higher resistance means warmer cables, higher fire potential.

Not giving YOU a electrical lesson, just my thoughts based on what you explained the video demonstrated. So I don't doubt the videos claims, I just wouldn't play that game and thought id explain it for anyone considering it.

I'm Yes and No on this
The charger has built in chip and phone dictates the charge to prevent any fires i would assume

 

[SyCoREAPER]

I'm Yes and No on this
The charger has built in chip and phone dictates the charge to prevent any fires i would assume

That's what I'm saying, you better pray that circuitry isn't defective out of the box or cooked over time leading to catastrophic failure.

More or less I see the 3A being supported/working as a technicality, not by design.

 

[Serkle K]

I just picked up a 45w superfast charger. Is it normal for the phone to reconnect every so often? I have noticed that when using theb45w charger and 5a cable, it will alert as if its been reconnected and show its charging. But it doesn't show its disconnected before it shows it's reconnected.

It also doesn't seem to charge any fast than the 25w. Time wise i lt seems to take the same time.

Is my charger defective?

 

[EazyD33]

I just picked up a 45w superfast charger. Is it normal for the phone to reconnect every so often? I have noticed that when using theb45w charger and 5a cable, it will alert as if its been reconnected and show its charging. But it doesn't show its disconnected before it shows it's reconnected.

It also doesn't seem to charge any fast than the 25w. Time wise i lt seems to take the same time.

Is my charger defective?

This isn't normal. This problem usually happens when the plug at either end of the cord is worn out and not seated into the port properly, or the cable is wornout. OR, it could be the port on the phone, or charger being worn out, but since these are new, I doubt that.

As far as charge times, when samsung first introduced 45w charging most of the online tests put the time difference between 25w and 45w somewhere between 8 and 10 minutes from 0%-100% if I recall. Even then, most of that quicker charge will be when your battery is between 0% and 30%.

 

[Serkle K]

This isn't normal. This problem usually happens when the plug at either end of the cord is worn out and not seated into the port properly, or the cable is wornout. OR, it could be the port on the phone, or charger being worn out, but since these are new, I doubt that.

As far as charge times, when samsung first introduced 45w charging most of the online tests put the time difference between 25w and 45w somewhere between 8 and 10 minutes from 0%-100% if I recall. Even then, most of that quicker charge will be when your battery is between 0% and 30%.

Thanks.

So you think its the phone or the charger? It didn't seem to happen with my charging brick from my S23U. I've also tried 2 different cables. The OEM 2.0 cable that came with the 45w charger, and an Anker USBC cable. It's the same behavior on both cables with my S25U.

 

[arunma]

I have a Samsung Galaxy Book2 Pro laptop, and the laptop charger used to only charge my S24 Ultra at Super Fast Charging 1.0 speeds. With my S25 Ultra it gives me Super Fast Charging 2.0 speeds. So yeah, there has been some improvement here.

 

[mustang7757]

I hear the s25 comes with 45w cable , I'm trying to find my box it came in to verify, can anyone else verify this?

 

[EazyD33]

They have not changed the included cord in the box with the phone. They changed the charging profile. Here's an article that I've found.

Samsung Galaxy S25 Ultra simplifies 45W Super Fast Charging 2.0, no 5A cable needed

Samsung has simplified its Super Fast Charging 2.0 with Galaxy S25 Plus and S25 Ultra. The new smartphones feature a more streamlined charging profile that ditches the requirement of using a special 5A charging cable. The Galaxy S25 Plus and S25 Ultra support 45W Super Fast Charging 2.0 at 15V...

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