Your AirPods 4 case won't charge. Or maybe one earbud stays stuck at 15 percent while the other reads full. Or the case itself refuses to take any power at all. These problems look different but trace back to the same short list of causes. Start with the most obvious fix first.
Check both charging contact points. Pull each AirPod out of the case and inspect the gold contacts at the base of the stem, plus the matching pins inside each case well. Lint and earwax pile up faster than you'd think, and once that layer gets thick enough, the circuit just won't close. A dry microfiber cloth wiped across those contacts clears more than half of AirPods 4 charging failures in under a minute.
Clean the USB-C Port
This is the biggest one. The AirPods 4 case uses USB-C only, no Qi and no MagSafe, so that single port is your only charging path. Pocket lint filters in through daily use and compacts into a dense plug at the back of the port. Shine a flashlight straight in and you'll usually see it.
Take a wooden toothpick or the plastic end of a SIM ejection tool and carefully scrape that debris out. Never use metal, the USB-C contacts inside are fragile and shorting them with a paperclip can kill the charging circuit permanently. Most case-won't-charge complaints end here after about 60 seconds of careful scraping.
Try an MFi-Certified USB-C Cable
Not all USB-C cables are equal. AirPods 4 charge fastest with Apple's official cable or any certified MFi third-party cable that carries the proper power negotiation. Cheap cables often fail silently, they look fine but deliver inconsistent voltage that leaves the case hovering at the same percentage for hours.
Plug directly into a wall adapter, ideally a 5W Apple charger or any adapter rated at least 5 watts. Computer USB ports are notoriously weak and can take all night to charge a case that would top up in 30 minutes from a wall socket. If a known-good cable changes nothing, the issue lives deeper.
Listen for the Lid Sensor
One of the known quirks on AirPods 4 is a lid sensor that can stop registering correctly. The case uses a magnetic sensor to know when the lid is closed. If that sensor fails to detect properly, the case won't enter charging mode for the earbuds inside.
Open and close the lid firmly a few times, you should hear and feel a clean magnetic snap. If the lid feels loose or doesn't click shut, try cleaning the magnetic edge with a dry cloth. Sometimes a tiny fleck of metal or debris bridges the sensor gap and tricks the case into thinking the lid is open when it isn't.
Let the Case Charge First
If the case battery is completely flat, the earbuds inside won't charge either. Plug the case into power with the lid closed and leave it alone for 30 minutes. Open the lid near your paired iPhone and the battery widget should appear showing both earbud levels and the case level.
If the widget doesn't appear, or if the case percentage stayed exactly where it was after 30 minutes on charge, the case battery itself is suspect. The widget only shows up when both earbuds are inside, so double-check you haven't left one on the counter before assuming a problem.
Charge One Earbud at a Time
When only one AirPod charges and the other stays silent, try isolating the problem bud. Remove the working earbud from the case and leave the non-charging bud alone in the case with the lid closed for 15-20 minutes. The H2 chip in that silent bud sometimes recovers when it's the only device the case needs to communicate with.
Pop the working earbud back in afterward and check both levels. If the previously silent bud now shows a matching percentage, the firmware state cleared. If it still reads zero, that specific earbud has a hardware issue.
Reset the AirPods 4
The reset method on AirPods 4 is different from every other AirPods model. There's no setup button on the back to hold. Instead, put both earbuds in the case and close the lid for 30 seconds. Open the lid. Double-tap the front of the case three times, once while the status light is on, again when the light flashes white, and again when the light flashes faster. The final flash sequence should be amber then white.
This resets the charging detection logic and clears any stale firmware state that could be blocking power delivery to one or both earbuds. After the reset, open the case near your unlocked iPhone to re-pair. You'll see the AirPods removed from your iCloud devices and re-added fresh.
Check Your iOS Version
AirPods 4 require iOS 18 or later for full functionality, and Apple recommends iOS 26 for the newest features. If your iPhone is running anything older than iOS 18, the charging detection and battery reporting may not work correctly. Go to Settings > General > Software Update and install any available updates.
Firmware updates for the AirPods themselves happen automatically while the case is charging next to a paired iPhone. Plug in, keep the lid closed, and leave the case near your unlocked phone for at least 30 minutes. Open Settings > Bluetooth, tap the (i) next to your AirPods, and check the version listed at the bottom. If you're more than one major build behind, leave it charging overnight and check again tomorrow.
Borrow a Known-Good Charging Setup
If you've cleaned the port, swapped cables, checked the lid sensor, reset the AirPods, and updated everything and still get nothing, test the case on a friend's charger. Charge from their adapter and cable. Works fine? Your original charging gear is the problem. Still refuses to charge? The case itself needs Apple's attention.
Book an appointment through the Apple Support app. The standard AirPods 4 case isn't serviceable for battery replacement, so expect a replacement unit if Apple confirms a hardware defect. If you're inside the one-year warranty window, bring proof of purchase. Out of warranty, the replacement cost is usually less than a full new pair, but only Apple can quote that for your specific case.
