How can I verify my RYOBI OP406 40V charger is working?

[SanMelanie]

To confirm your RYOBI OP406 40 Volt Lithium-Ion Rapid Charger is charging correctly, observe the LED indicator. During charging, the LED flashes, signaling the process is active. When nearing full charge, the LED becomes solid green, indicating the final stages. A solid green LED also means the battery is fully charged and ready. If the LED flashes and indicates an error, check for issues by removing and reinserting the battery. If the problem continues, test with another battery. If other batteries charge, replace the original. If the error continues with multiple batteries, the charger may need replacement.