The Pixel 4a with 5G charges through its USB-C port and, being a phone from 2020, its charging faults come from three places: the cable and charger, the port and the battery. Google's help page for charging problems describes the checks, and the first is a different cable and a different charger. Use the original Google charger or a certified USB-C power delivery charger, since a cheap charger may supply too little current and a worn cable fails even when it looks fine.
The checks in more detail
Try another outlet and, if possible, a computer's USB port, though that charges slowly. A phone that charges on one cable and not another needs a new cable. Look inside the USB-C port with a flashlight: pocket lint packs into the port over the years and keeps the plug from seating, which is the commonest cause of a charging failure on an older phone. Remove it gently with a wooden or plastic toothpick, with the phone switched off, never with metal.
If the port is clean and the cable good, restart the phone, and if it will not turn on, plug it in and leave it for thirty minutes, since a battery that fell very low needs time before the screen responds. A force restart by holding the power button for thirty seconds clears a frozen state. If the phone charges slowly, check Settings, Battery, and look for the message that it is charging slowly, which means the charger or the cable does not support fast charging.
Heat stops charging: a phone that is hot, in the sun or in a thick case, pauses at some point, so let it cool. After several years, the battery wears and holds less charge, which gives short life and sudden shut-offs at 20 or 30 percent; Google has a battery health page for newer phones, but on the 4a the sign is a fast fall, and a battery replacement restores it. A swollen battery pushing the screen out is dangerous, so stop using it and take it for service. A port that is loose or damaged by bending needs a repair.
Differential
Likely causes of “Google Pixel 4a (5G) will not charge or charges slowly”, and how to tell them apart
- 1
A faulty cable or charger
What separates it Charges on one set but not another
How to confirm Replace the cable or charger
- 2
Lint in the USB-C port
What separates it The plug does not seat
How to confirm Clean with a toothpick, phone off
- 3
A deeply discharged battery
What separates it No response on charge
How to confirm Charge for thirty minutes
- 4
Heat
What separates it Charging pauses
How to confirm Let it cool and remove the case
- 5
An aging battery or port
What separates it Short life or a loose port
How to confirm Replace the battery or port
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether another cable works
- The state of the port
- The charging message
- The age of the battery
Try in this order
0 of 6 completedTry another cable and charger
ReversibleOriginal or certified.
Inspect the port
ReversibleWith a flashlight.
Clean the lint
ReversibleWith a toothpick, phone off.
Charge for thirty minutes
ReversibleBefore judging.
Force restart
ReversibleHold power thirty seconds.
Replace the battery
ReversibleIf life is short.
Model-specific
What is true of this model and not of its siblings
- Lint
- It builds up in older ports.
- Battery age
- A 2020 battery has worn.
Stop boundary
When this stops being a self-service repair
- !If the port is clean and the cable good, have the port or battery replaced
- !If the battery swells, stop using it
- !Back up first
Evidence ledger
Sources behind this answer
Mobile data, SIM and network resets.
Screen protectors, Safe mode and restarts for touch faults.
Storage, Free up space and Smart Storage.
Exact questions
Common questions
Why will my Pixel 4a 5G not charge?+
A cable, lint in the port or a worn battery.
How do I clean the port?+
With a wooden toothpick, phone off.
Why does it charge slowly?+
The charger may not support fast charging.
When is the battery worn?+
If it falls fast or shuts off early.