Wear safety goggles to protect against potential acid splashes.

It is normal for the unit to feel warm, but if it smells of burning plastic, unplug it immediately.

Disclaimer: This guide is for informational purposes. Always refer to the original manufacturer's labels on the device for specific electrical ratings and warnings.

Bosch KL 1208 Battery Charger: The Exclusive Guide to Operation and Maintenance

Do not plug the charger into the wall outlet until the clamps are connected to the battery.

Slight bubbling is normal near the end of a charge, but violent bubbling or a "rotten egg" smell indicates the battery is being overcharged or has a shorted cell. 5. Maintenance and Storage To keep your Bosch KL 1208 in peak condition:

Connect the to the positive terminal of the battery.

As the battery reaches capacity, the internal resistance increases, and the Bosch KL 1208 will automatically "taper" the charge. You will see the ammeter needle slowly drop toward zero.