How can I tell if my HILTI C 4-36 MC4 charger is working?

[MacMax]

To confirm your HILTI C 4-36 MC4 Multi-Bay Lithium-Ion Battery Pack Charging Station is charging correctly, check these indicators: First, look for the Supply Voltage LED on the charger; it should glow green when plugged in and ready. Second, observe the Battery Charge State LEDs on the battery itself, which blink initially and then light up to show the charge level: Three LEDs lit, one blinking indicates 75% to 100% charge; two LEDs lit, one blinking is 50% to 75%; one LED lit, one blinking means 25% to 50%; and one blinking LED shows less than 25% charge. Third, the Charge Status LED on the charger blinks during charging and lights up when the battery is full. Finally, the Battery Temperature LED on the charger signals if the battery is within the acceptable temperature range; a blinking LED suggests the temperature is too high or too low. Consult the Hilti C 4-36 MC4 manual or Hilti Service for further assistance if needed.