To give you a more accurate report, could you clarify if this is for an charger? Knowing the exact brand would help pinpoint specific changelog notes. How to Upgrade SkyRC B6neo Firmware Tutorial
Open the firmware uploader tool, select the V22 file, and click "Update." until the progress bar reaches 100% and the device reboots itself. Troubleshooting Common V22 Issues q6x v22 firmware