How can I verify if my Hilti C 4-12-50 Compact Battery Charger is working correctly?

[Norma]

To confirm that your Hilti C 4-12-50 Compact Battery Charger is functioning properly, observe the indicator lights on both the charger and the battery. On the charger itself, LED 1 provides critical information. A solid green light signifies the charger is ready for use. If it flashes red, this indicates the battery's temperature is outside the optimal charging range. LED 2 on the charger also offers key insights. If LED 2 is off, either there is no AC power supply or the charger may have an issue. A flashing green light means the battery is currently charging, while a solid green indicates a fully charged battery. The Li-ion battery's state of charge display is also important. Four illuminated LEDs show a 100% charge. When three LEDs are lit and one flashes, the charge is between 75% and 100%. Two LEDs lit with one flashing signify a 50% to 75% charge. If one LED is lit and another is flashing, the charge is between 25% and 50%. Finally, if only one LED is flashing, the battery's charge is less than 25%. By carefully noting these indicators, you can easily assess the charging status and battery health. For more detailed troubleshooting or specific concerns, consult your Hilti C 4-12-50 Compact Battery Charger's manual or contact Hilti customer service.