A Galaxy A25 that charges slowly, intermittently or not at all has a cause that falls into one of three groups: the cable and charger, the port, or the software. The A25 supports 25 W charging over USB-C, and Samsung's own advice in the community threads is to use a genuine Samsung charger and to check the cable for damage, since a cable that works for slow phone charging may fail at 25 W. Some owners reported charging taking three to four hours after a One UI update, which points to a settings or software cause, so check that fast charging is on and update the phone.
Lint in the USB-C port is a very common cause of a loose connection; look with a flashlight and clean it with a wooden toothpick. A phone that is hot stops charging to protect itself. Wireless charging is not supported on the A25, so a charging pad will not work; only the USB-C port charges the phone. If the phone says Charging but the percentage does not rise, a worn battery or a heavy app can be using as much power as the charger supplies.
Differential
Likely causes of “Samsung Galaxy A25 5G will not charge or charges slowly”, and how to tell them apart
- 1
An old phone charger from a previous handset
What separates it Charging crawls, or the screen says only Charging
How to confirm Use a USB PD charger of about 25 W; the A25 box holds no adapter
- 2
A cable made for data or for low power
What separates it The phone charges only when it sits still
How to confirm Swap in a short USB-C cable that is marked for fast charging
- 3
Grime packed into the USB-C socket
What separates it The plug wobbles and the charging chime repeats
How to confirm Switch off, then lift lint out with a wooden toothpick, never metal
- 4
Super fast charging turned off by an update
What separates it It took under two hours before and now takes three
How to confirm Open Charging settings in Battery and device care and switch on Super fast charging
- 5
A phone running hot under a case
What separates it Charging pauses at a percentage and resumes later
How to confirm Remove the case and move the phone off a pillow or a sunny sill
Before you touch a setting
Record this first — changing settings destroys the evidence
- Which charger and cable you used, and whether either charges another phone
- The wording shown on the lock screen while it charges
- How long a charge from twenty to eighty percent takes
- Whether the socket looks clean under a flashlight
Try in this order
0 of 8 completedBorrow a proper adapter and cable
ReversibleTry a certified 25 W USB PD adapter and a USB-C cable marked for fast charging on the A25; the box ships without a charger.
Look inside the socket
ReversibleSwitch the phone off and shine a flashlight into the USB-C opening; lift any lint out with a wooden toothpick.
Read the lock screen text
ReversibleWhile charging, wake the screen; it says Super fast charging, Fast charging or just Charging, which tells you what the charger negotiated.
Turn on the fast charging option
ReversibleSettings, Battery and device care, Battery, Charging settings, then enable Super fast charging.
Charge idle and uncovered
ReversibleTake the case off and leave the phone alone for twenty minutes to see the real speed.
Restart, then update
ReversibleA restart clears a stuck charging state; install any waiting software update afterwards.
Charge with the phone off
ReversiblePower the phone off and charge for thirty minutes; if it gains well off but not on, an app is using the power.
Check the Safe mode result
ReversibleBoot into Safe mode by holding the power and volume down keys and test charging there, which removes third-party apps from the picture.
Model-specific
What is true of this model and not of its siblings
- No adapter in the box
- Many A25 owners use an old 10 W brick, which is why charging feels slow.
- Reading the lock screen
- The text shows the mode the charger negotiated.
- Socket lint
- Pockets pack lint into USB-C sockets over months.
- No wireless charging
- The A25 charges through its USB-C port only.
- Charging and use
- Heavy use on a slow charger can cancel out the charge.
Stop boundary
When this stops being a self-service repair
- !A phone that will not charge on a certified 25 W charger with a clean socket needs a Samsung service visit
- !A socket that has bent or loose contacts needs repair, not more cables
- !Heat, swelling or a burning smell means unplug at once
Evidence ledger
Sources behind this answer
Owner thread about charging taking three to four hours after an update.
Specifications: 5,000 mAh battery, 25 W charging, Exynos 1280, 6.5-inch 120 Hz Super AMOLED.
General Samsung heat fixes for charging, apps and the case.
Exact questions
Common questions
Why does my A25 take so long to charge?+
The charger may not support 25 W, or Super fast charging may be off.
Does the A25 box include a charger?+
No, the adapter is sold separately.
Can an update change charging speed?+
Some owners saw it after updates.
Is a wobbly plug a fault?+
Often lint, but a loose socket needs repair.