Baseus cable stopped fast charging, how can I fix it?

First test it with another compatible charger and device to determine whether the issue is the cable or another component.

Check that the cable supports the required charging protocol and wattage, inspect both connectors for dirt or damage, and try a different USB port or power adapter.

If fast charging still does not return, restart the device and test with another known-good cable; some phones also require fast charging to be enabled in their settings.

If the Baseus cable remains limited to standard charging despite these checks, contact Baseus support or the seller for warranty or replacement assistance.

If support does not reply, you might want to consider posting a complaint on Xolvie in order to bring attention to the issue and try to find a solution.