The Galaxy S23 charges at 25 W with a cable, and 15 W on a wireless pad, so a long charge is built in: it is the slowest phone in the S23 family at the plug. A phone that charges slowly is therefore not necessarily broken; a phone that charges not at all, or that stops at a set level, is what to chase. Look at the lock screen label while it is plugged in, then at the port, then at the Protect battery setting. At three years old, the port is the part that has done the most work, and lint or wear there is the commonest hardware reason.
Differential
Likely causes of “Samsung Galaxy S23 will not charge or charges slowly”, and how to tell them apart
- 1
Lint pressed into the USB-C port
What separates it The cable wobbles or only charges when held at an angle, and the phone sometimes says it detects moisture
How to confirm Light the port with a flashlight, switch the phone off, and lift the lint out with a wooden toothpick
- 2
An adapter without PPS or a cable that is not rated 3 A
What separates it The lock screen reads Charging slowly, and a full charge takes hours
How to confirm Use the Samsung 25 W adapter or any USB PD 3.0 PPS adapter with a good 3 A cable
- 3
Protect battery holding at 85 percent
What separates it Charging stops at 85 percent every day
How to confirm Settings, Battery, More battery settings, Protect battery: switch from Maximum to Basic
- 4
A wireless pad that does not line up
What separates it The charging symbol flickers on a pad and the phone does not warm
How to confirm Take the case off and center the phone on the coil
- 5
A software fault after an update
What separates it The percentage will not rise on any charger
How to confirm Restart, then charge in Safe mode for twenty minutes
- 6
A fraying cable
What separates it The cable works only at one angle or gets warm near the plug
How to confirm Replace the cable with a new 3 A USB-C cable before you suspect the port
Before you touch a setting
Record this first — changing settings destroys the evidence
- The adapter and cable, and whether they charge another phone
- Whether wired charging, wireless charging or both fail
- Any moisture or Charging slowly message
- The percentage now and after fifteen minutes plugged in
Try in this order
0 of 6 completedSwap in a pair that is known to work
ReversibleTake the cable and adapter that charge another Samsung phone and plug them straight into a wall socket, not a power strip or a car port.
Look into the port
ReversiblePower off, shine a flashlight into the port and lift lint with a wooden toothpick. Push gently along the walls, not into the contacts.
Check the charge limit
ReversibleSettings, Battery, More battery settings, Protect battery. Maximum stops at 85 percent on purpose.
Try a wireless charge once
ReversiblePlace the phone on a Qi pad without a case; if it charges there, the port or cable is the problem.
Restart and test in Safe mode
ReversibleRestart, then charge for twenty minutes in Safe mode to rule out an app.
Let the phone test itself
ReversibleSamsung Members, Get help, Phone diagnostics, Battery and charging.
Model-specific
What is true of this model and not of its siblings
- What the S23 charges at
- 25 W wired, 15 W wireless Qi, and 4.5 W reverse charging for earbuds or a watch from the back of the phone.
- Why a 25 W adapter matters
- A plain 5 W or 10 W brick will charge the S23 but can take well over two hours.
- Why an S23 charges slowly after three years
- Cable ends and ports wear, and a 25 W charger that was fine in 2023 may now have a fraying cable, so swapping the cable first is cheap and often decisive.
- How to read the charging label
- The lock screen shows a different word for slow charging, fast charging and super fast charging; seeing slow on a 25 W adapter points at the cable.
- How long a full charge should take
- Samsung's own figure for the S23 with a 25 W adapter is under an hour and a half from empty; a charge that now takes well over two hours points at the cable, the adapter or the port, and the battery's age is the next suspect.
- A cheap test
- Charge from 20 to 50 percent and note the minutes, then repeat with a different cable. A big difference means the first cable was limiting you.
Stop boundary
When this stops being a self-service repair
- !If two known-good adapters fail with a clean port, book a Samsung repair
- !If the connector is loose in the port, it needs replacing
- !A hot or swollen phone goes to service at once
Evidence ledger
Sources behind this answer
Exact questions
Common questions
How fast does the S23 charge?+
Wikipedia lists 25 W Super Fast Charging for the S23, against 45 W for the S23+ and Ultra, plus 15 W Qi wireless on all three.
Why does my S23 charge so slowly?+
A charger without PPS, an old cable, or heavy use during the charge. The Samsung 25 W adapter with a 3 A cable gives the full rate.
Does Samsung sell the S23 battery on its own?+
No. The US price list gives a screen module repair that includes the battery, at $209 for the S23.
Is a charger in the S23 box?+
Not in the US; Samsung stopped including one with the Galaxy S21.
Is it worth replacing the S23 charging port?+
If a clean port and two good cables still fail, a port repair costs far less than a new phone.
Why does my S23 charge to 85 percent and stop?+
Protect battery is on Maximum; change it to Basic.
Does the S23 fast charge on a car charger?+
Only a PD PPS car charger will; most 12 V car adapters give a slow charge.
Can I charge the S23 overnight on Protect battery?+
Yes. Basic stops at the limit after the night's charge so the battery spends less time at 100 percent.