Bosch Kl 1206 Manual |link| -

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| Problem | Likely Cause | Solution | |---------|--------------|----------| | Red light flashes, no charging | Battery too hot/cold | Let battery sit at room temperature for 30 minutes. | | Green light stays on but battery dead | Battery worn out (end of life) | Replace battery pack. | | No light when plugged in | Blown fuse, bad outlet, or dead charger | Test another outlet; if no change, replace charger. | | Charger gets very hot | Blocked vents or high ambient temp | Move to cooler area, ensure vents are clear. | Bosch Kl 1206 Manual

: Connect the black clamp to the negative (-) battery terminal or a clean metal part of the vehicle chassis away from the battery. End of Report | Problem | Likely Cause

: Ensure the charger is placed as far from the battery as cables allow. Never place it directly above or below the battery to avoid damage from corrosive gases. Connect Terminals : | | Charger gets very hot | Blocked