The Galaxy S24+ charges at 45 W, but only when everything in the chain supports it: a 45 W USB PD 3.0 PPS adapter, a 5 A rated cable and a phone that is not too warm. Many S24+ owners are using a 25 W brick left over from an older Samsung phone or a laptop charger without PPS, which gives a slow charge and a Charging slowly message. A phone that refuses to charge at all is a different problem, and on a phone that is now over two years old the likeliest causes are lint in the port, a worn cable, or Protect battery stopping the charge at 85 percent.
Differential
Likely causes of “Samsung Galaxy S24+ will not charge or charges slowly”, and how to tell them apart
- 1
An adapter or cable below what 45 W needs
What separates it The lock screen shows the slow message, and a charge from empty runs close to two hours
How to confirm Pair Samsung's 45 W adapter with the 5 A cable it ships with; ordinary 3 A cables hold the S24+ to a lower rate
- 2
Debris compressed into the USB-C socket
What separates it The plug will not click home, or the phone charges only when the cable is nudged sideways
How to confirm Power the phone down, shine a flashlight into the socket and ease the debris out with a wooden toothpick
- 3
The 85 percent charge ceiling
What separates it It reaches 85 percent every time and stops, however long you wait
How to confirm Settings, Battery, Charging, then switch Protect battery from Maximum to Basic
- 4
Heat slowing the charge on purpose
What separates it Charging starts quickly and then crawls while the back is warm
How to confirm Rest the phone without a case in a cool room and charge it idle
- 5
A process that is holding the phone awake
What separates it The percentage does not climb on any adapter, though the lightning icon shows
How to confirm Restart, then watch twenty minutes of charging in Safe mode
Before you touch a setting
Record this first — changing settings destroys the evidence
- Which adapter wattage is printed on the brick you use
- What the lock screen says in the first minute of a charge, and whether it changes
- Whether the phone is warm to the touch when the charge slows
- How many minutes it takes to go from 20 to 50 percent on a wall socket
Try in this order
0 of 6 completedPair the right adapter and cable
ReversibleTake the Samsung 45 W adapter and its own cable, and plug into a wall outlet instead of a power strip; this is the combination that lets the S24+ charge as fast as it can.
Look into the socket
ReversibleWith the phone off, light the USB-C socket and clear any packed fluff with a wooden toothpick, scraping the walls and not the center tongue.
Look at the ceiling setting
ReversibleSettings, Battery, Charging, Protect battery. Maximum halts the charge near 85 percent by design.
Take the heat away
ReversibleRemove the case, put the phone on a hard surface and leave it alone while charging, so that heat is not what slows it.
Charge in Safe mode for twenty minutes
ReversibleIf the percentage rises there, an installed app was holding the phone back and the newest installs should go first.
Ask the phone to test itself
ReversibleSamsung Members, Get help, Phone diagnostics, Battery and charging reports on the cell and the charge circuit.
Model-specific
What is true of this model and not of its siblings
- The S24+ against the S24
- The S24+ charges at 45 W where the S24 tops out at 25 W, so an owner who moved up expects speed that only the right adapter delivers.
- Repair route
- A worn USB-C port is replaceable at a Samsung service center.
- What 45 W buys you
- Samsung's 45 W adapter, with a 5 A cable, charges the S24+ noticeably faster than the S24's 25 W; without that pair the S24+ is limited to what the adapter and cable offer.
- How to tell it is the adapter
- Plug the same cable into a laptop USB-C port and into the phone's own adapter; if the label changes, the original adapter was the limit.
- What a loose connector means
- If the cable only charges when held at an angle with a good cable and a clean port, the USB-C connector inside the phone is worn and needs replacing; Samsung can do this as a repair.
Stop boundary
When this stops being a self-service repair
- !A loose or wobbling connector with a good cable means the S24+'s USB-C port needs replacing at a service center
- !If two adapters that charge another phone at speed will not charge the S24+ at all, book Samsung's charging diagnosis
- !A hot, swollen or smelly phone must not be left on a charger
Evidence ledger
Sources behind this answer
Exact questions
Common questions
How fast does the S24+ charge?+
Wikipedia lists 45 W wired and 15 W wireless for the S24+, which is a good deal faster than the S24's 25 W wired rate.
Why is my S24+ slow on a charger that claims to be fast?+
The adapter needs USB PD PPS support and the cable a 5 A rating; if either is missing, the phone drops to what that adapter or cable can carry.
Is an adapter in the S24+ box?+
Not in the US; Samsung sells its 45 W adapter on its own.
Does wireless charging suit the S24+?+
It is convenient at up to 15 W, but slower and warmer than the cable, so keep it for overnight and use the cable when you are in a hurry.