The back page of the manual has a color-coded schematic:
: The unit includes built-in protection against reverse polarity and short circuits to prevent damage during accidental misconnection. bosch kl 1206 user manual
: Check for visible wear or damage before every use. The back page of the manual has a
: If the battery is excessively hot, allow it to cool to room temperature before attempting a charge, as noted by troubleshooting guides on SlashGear . bosch kl 1206 user manual
: Ensure the area is well-ventilated and the charger is unplugged from the AC outlet before connecting leads.