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Quick Charge: How To Do Fast Charging In Samsung and iPhone
Jul 4, 2025
In this video, I explain how quick charging works in mobile phones and how to do fast charging in Samsung mobile phones and iPhones. If you don't want the explanation of the science behind quick charging and want to jump to what you need to be able to fast charge your Samsung smartphone or iPhone, start at the 4.20 mark. PS: the information in this video is true for all other smartphones too. #quickcharge #quickcharger #fastcharging #fastchargingphone #fastcharge
View Video Transcript
0:01
[Music]
0:08
Hello, this is Mr. Mobility and in this
0:11
video I want to share with you how fast
0:13
charging works. It works for Android
0:16
pretty much the same way it works for
0:18
iPhones. Let's get into it. Your
0:21
standard charging from a USB cable has a
0:25
5 W rating. Electricity is measured in a
0:29
rating of watts. Think of watts as a
0:32
measuring unit. One bottle, two bottles,
0:36
one car, two cars, that kind of a thing.
0:38
So one watt, two watts, 3 watts, 5
0:41
watts. The higher the wattage, the
0:44
higher the power that is being passed
0:47
through to your smartphone, to your
0:49
laptop, to your TV, to anything that
0:52
uses electricity. Standard charging
0:54
using a USB cable is 5 W.
0:58
If you have been around for a long time,
1:00
you'll remember the time when we did not
1:02
have fast charging yet. It took hours
1:06
for our phones to charge. Sometimes a
1:09
minimum of 3 hours to get the battery of
1:11
your phone full. Scientists came up with
1:14
an idea. If we pump more power into the
1:19
phone, we can charge it up faster than
1:22
usual and reduce the number of hours
1:26
that users have to wait for their phones
1:28
to get charged. Brilliant idea. There's
1:31
a problem also. And the problem is this
1:34
that when you pump more power into a
1:36
phone or into any device actually, it's
1:39
going to heat up a bit because you're
1:41
putting in more power, more effort, more
1:44
pressure.
1:45
it's going to heat up a bit. In fact,
1:47
it's going to heat up a lot depending on
1:49
how much power you're putting in. They
1:51
fixed that. And how was that fixed? For
1:53
the period where you're topping up the
1:55
battery up to about 60 to 70, in some
1:57
cases up to 80%, the charger pumps in
2:01
more power than 5 W.
2:04
Sometimes 18, sometimes it's 20,
2:07
sometimes it's 30, sometimes it's 45,
2:10
sometimes it's 90, 100, 120, depending
2:14
on how powerful the fast charger is. The
2:16
charger pumps in more power into that
2:19
phone for from 0 to maybe 60, 70, 80%.
2:25
So during that period, the battery of
2:28
your phone charges really fast. That's
2:30
when most of the fast charging happens.
2:32
Once it gets to between 70 and 80%,
2:37
the charger reduces the amount of power
2:40
that it passes into the phone to prevent
2:44
overheating and to prevent other damages
2:47
that may come from filling up that
2:50
battery to the full too fast or topping
2:53
it up fully too fast. Have you ever been
2:55
at a gas station, a foil station,
2:57
depending on which country you are in,
2:59
and while the nozzle of the foil is in
3:02
your foil powered car, when it gets to a
3:05
point, the nozzle clicks and stops
3:07
pumping, you see that foil tank is
3:11
pretty much filled up. There's still
3:13
some space left in it that can take more
3:15
foil, but at that point, that's a
3:18
critical point it has reached, and it is
3:20
not advisable to let it fill up more
3:22
than that. The analogy is not perfect.
3:24
I'm just trying to paint a picture that
3:27
as a rule, it's a good idea that when a
3:31
phone battery is being charged faster to
3:33
a certain extent, when it's very close
3:35
to maximum capacity, that you need to
3:37
slow down how much power is being pushed
3:41
into the phone to avoid problems.
3:44
Some of those problems will mean that
3:46
the phone overheats and gets damaged in
3:48
some way or actually combusts and is
3:51
totally destroyed. So that's how modern
3:54
fast charging works. The charger pumps
3:57
in a lot of power from zero to anything
4:00
from 70 to 90%. And then slows down. And
4:04
from that point, what it does is called
4:06
trickle charge. Trickle trickle charge.
4:09
In other words, the adapter is feeding
4:12
small amounts of power into the phone as
4:16
it approaches the 100% mark. What are
4:20
the requirements for fast charging to
4:23
happen in a phone? First, you need a
4:26
compatible phone. A phone that has fast
4:28
charging built into it. You need a fast
4:31
charging adapter.
4:33
That's an adapter that has fast charging
4:35
built into it. And then you need a high
4:38
quality cable. Those are the three
4:39
things, the three factors required for
4:42
fast charging to happen in a phone. Now,
4:46
we have a challenge. There are different
4:49
types of fast charging standards and
4:51
technologies. Yes, different types. And
4:54
what does that mean? It means the fast
4:56
charging that you see in a OnePlus phone
5:00
may not work in a Samsung phone, may not
5:03
work in a Google Pixel or an iPhone.
5:06
Some of these standards are more common
5:08
than others. Let's go through the
5:10
different available types and standards
5:14
of fast charging. Power delivery. PD, if
5:18
you're looking through the specs of
5:18
phones, sometimes you see PD, PD 2.0, P,
5:21
PD 3.0. That's power delivery. Power
5:24
delivery is an open standard that is
5:28
becoming really widespread.
5:30
Lots of manufacturers are using it.
5:32
Apple uses it, Samsung uses it, Google
5:35
Pixel, Motorola, and you will also find
5:38
it in quite a number of other top brands
5:41
in the market.
5:42
It works with USBC. Pretty much every
5:46
power delivery,
5:48
every power delivery fast charger uses a
5:52
USBC to USBC cable. I recommend to you
5:56
adopt power delivery as your standard
6:00
fast charging technology for using your
6:02
phones.
6:03
If you use an Apple, Samsung, Google
6:06
Pixel or Motorola phone, power delivery
6:10
is used by all the top manufacturers.
6:12
So, you can't go wrong with that. It
6:14
means that if you have one power
6:15
delivery charger from Motorola or from
6:18
Samsung or from Apple, you can use it
6:21
with phones from any of those other guys
6:23
as long as they are USBC connectors. The
6:27
next available standard is Qualcomm
6:29
Quick Charge. Qualcomm quick charge is
6:31
also fairly popular, but it's restricted
6:34
to only phones that use Qualcomm's
6:37
processors. So, if you switch from a
6:40
phone using a Qualcomm processor to a
6:42
phone using a MediaTek processor or a
6:45
unisoft processor, whatever quick charge
6:48
adapter you have becomes useless with
6:52
those devices. That's the problem.
6:54
Samsung has a proprietary fast charging
6:57
standard called adaptive fast charging.
6:59
Almost every Samsung charger or adapter
7:02
that you see has adaptive fast charging,
7:06
but it also likely has power delivery,
7:10
especially the new ones. So, they
7:12
support at least two of these standards,
7:16
adaptive fast charging, power delivery.
7:19
OnePlus has W charge. W charge is what
7:23
they call their proprietary fast
7:24
charging technology. If you use a
7:27
OnePlus charger that supports only W
7:29
charge and does not support power
7:31
delivery when you use it to charge a
7:34
phone from another brand, you will not
7:37
get fast charging out of it. That's the
7:39
problem. But if that warp charge adapter
7:43
supports both W charge and power
7:46
delivery, then you'll be able to use it
7:48
with all the other brands that use power
7:50
delivery and get fast charging with
7:53
their devices plugged in. That's how uh
7:57
the world of fast charging is. There are
7:58
different standards. It's not that you
8:01
can just take any fast charger you like
8:03
and because you've heard that your phone
8:05
supports fast charging, you can use them
8:07
together. No, you need to know what type
8:10
of fast charging the
8:13
power brick or adapter supports. You
8:15
need to know what type of fast charging
8:17
the phone supports. And it is when you
8:20
put the two together, when you use the
8:22
two together, that you get the fastest
8:24
possible speeds during charging. Also, I
8:28
know I mentioned this at the early stage
8:30
of the video that wattage, right? When
8:34
we talk of 5 W, 10 W, 18 W, it's a
8:37
measurement of quantity. So, as a rule,
8:40
the higher the number, the higher the
8:43
wattage, the faster your phone will
8:45
charge. A 30 or 33 watt fast charger
8:50
will charge your phone faster than an 18
8:53
watt fast charger will. A 45 watt fast
8:57
charger by default should charge your
8:59
phone faster than a 33 watt fast charger
9:02
does.
9:04
A 100 watt fast charger should charge
9:07
your phone faster than a 45 watt fast
9:09
charger does.
9:11
Also note I said by default. Also note
9:16
that each charger and each phone has a
9:21
specified maximum wattage.
9:25
If this is an 18 watt fast charger,
9:28
power delivery and this phone supports
9:31
45 watt fast charging power delivery.
9:35
If I use this 18 watt charger with this,
9:38
I will not get 45 watt speed with this
9:41
phone. I will get only 18. This charger
9:43
is able to push out only 18 watts
9:46
maximum to this phone. No matter what
9:48
this phone has, if no matter what this
9:50
phone supports, if this phone supports
9:52
100 W and this guy has only capacity for
9:55
18 watts, it's going to push out only 18
9:58
watts to this phone. That's how fast
10:00
charging works. Remember, you need a
10:04
compatible phone, a compatible charger,
10:07
and a high quality cable. And then the
10:10
ratings also matter.
10:13
And when I say a compatible charger and
10:15
a compatible phone, I mean they must use
10:18
the same fast charging standard or
10:21
technology. So if this is power
10:23
delivery, this has to be a power
10:25
delivery supported phone for the fast
10:27
charging to work. If this is a WP charge
10:31
uh adapter, this phone has to support W
10:33
charge. If this is a Qualcomm quick
10:37
charge adapter, this phone has to
10:39
support Qualcomm quick charge for the
10:41
fast charging to work. So, generally
10:44
that's how fast charging works. I hope
10:47
that I was able to explain things
10:49
clearly. If you have any questions,
10:51
please ask in the comments and as time
10:53
is available to me, I will try to give
10:56
you helpful and useful answers. Don't
10:59
forget to like this video, share with
11:01
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11:03
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11:06
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11:08
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11:10
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