Fast charging on the OnePlus 15 is designed to save you time, so when it suddenly stops working, it can be frustrating. You plug in the charger, but the phone charges slowly or shows regular charging instead of fast charging. In most cases, this issue is caused by simple factors like cables, settings, or temperature limits, and you can fix it without visiting a service center.
Why Fast Charging Is Not Working on Your OnePlus 15
- The charging cable or adapter does not support fast charging.
- Charging optimization or battery protection settings are limiting speed.
- The phone is too hot or too cold to allow fast charging.
- Dirt or debris is blocking the charging port.
- A temporary software glitch is affecting charging behavior.
Check the Charging Cable and Adapter
Fast charging only works with compatible cables and power adapters. If you use a low watt charger or a damaged cable, the phone automatically falls back to standard charging.
Use the original OnePlus charger and cable if possible.
Plug the charger directly into a wall outlet, and then connect it to your phone.
Watch the lock screen and confirm if fast charging appears.
Clean the Charging Port
Dust and lint can block the charging pins, which reduces power delivery. Even a small amount of debris can prevent fast charging from activating.
Turn off your OnePlus 15, and then unplug the charger.
Inspect the charging port with a light, and gently remove debris using a wooden toothpick.
Plug the charger back in and test charging again.
Turn Off Charging Optimization
Charging optimization protects battery health but may slow down charging speeds. Disabling it can help restore full fast charging performance.
Open Settings, and then tap Battery.
Tap Charging or Battery health, and then turn off charging optimization.
Lock the phone and reconnect the charger to check the result.
Let the Phone Cool Down
Fast charging pauses automatically when the phone overheats. High temperatures from gaming or direct sunlight can force slower charging.
Unplug the charger, and place the phone in a cool area.
Wait a few minutes for the temperature to drop.
Reconnect the charger and see if fast charging resumes.
Restart the Phone
A restart refreshes system processes that control charging behavior. This can fix temporary bugs that prevent fast charging from working properly.
Press and hold the Power key, and then tap Restart.
Wait for the phone to boot up fully.
Plug in the charger and check the charging status.
Test With Another Power Source
Sometimes the wall outlet or power strip is the problem. Testing another source helps rule this out quickly.
Unplug the charger from the current outlet.
Plug it into a different wall socket, and then connect your phone again.
Check if fast charging activates.
Fast charging issues on the OnePlus 15 are usually easy to solve once you identify the cause. With the right charger, clean port, and correct settings, your phone should return to charging at full speed again.
FAQs
How can I tell if fast charging is working on my OnePlus 15?
When fast charging is active, the lock screen usually shows a fast charging message or animation. If it only says charging, the feature is not active.
Can third party chargers support fast charging on OnePlus phones?
Some third party chargers work, but they must support the same fast charging standard and wattage. Using the official OnePlus charger is always the safest option.
Does fast charging damage the battery over time?
Fast charging is designed to be safe, but frequent use can generate more heat. Charging optimization helps reduce long term battery wear when enabled.
