Samsungs fast charging

[AntFrancis]

Hi there I've recently bought a tablet from Samsung the S8 ultra. 

It didn't come with the charger  which I was kind of prepared for.

I have type C chargers including a laptop one. 

however no matter the wattage and the ampere of the charger it never goes into fast charging mode.

Does it have to be a proprietary Samsung charger ? And if so shouldn't the Apple-ish behaviour be known?

[m1lk3y]

Unless they changed that for their phones, that shouldn't be the case. I have a laptop charger that I use on my phone on occasion and it allows my S21+ to do Super Fast Charging (not a Samsung charger). I realize the Wattage for tablets is probably different, but I would double check the settings on the tablet. I know at least my phone has a slider that allows me to turn fast charging and super fast charging on and off. Apart from that I'm not sure what to tell you.

[Lurking]

Some cables are not rated for higher wattage. Or the charger for the laptop doesn't follow the whatever standard 

 

From the old USB at 5V/0.5A  the different standards go to 5V/2A, 7V, 9V, or even 12V to increase power. But what voltage to use is communicated between the power supply and the device. It likely also measures cable resistance. The overall charging will happen at whatever of the 3 items has the lowest standard/quality. 

 

Unless you really need it, I would use normal charging speed since too high charging speed will wear out the battery due to heat etc. 

[Kazooduck]

Only use official cables and wall warts or those from anker. It’s not a compatibility issue, just reliability of unknown brands.

[OhioYJ]

On 5/9/2022 at 11:34 AM, AntFrancis said:

however no matter the wattage and the ampere of the charger it never goes into fast charging mode.

As @Lurkingpointed out it's not amperage in this case. Many modern Samsung devices (including the one I'm using to post this) come with a fast charger that outputs 5V and 9V @ 2 amps IIRC (I don't use it). They are increasing voltage, not current to fast charge. Since I doubt any of your chargers are outputting 9V at times like the OEM the phone knows it's not OEM, and not "fast" charging.

 

AS already mentioned once here, I'm also of the opinion that slow charging is better for battery life. Both lifespan, and screen time in my tests. In fact the slower the better, most of my devices are fine charging as slow as 0.5 amp, and rarely ever am I in a situation that need them to charge faster. My phone generally lasts a couple days anyways.