Bosch Kl 1208 Battery Charger Manual Jun 2026

Never plug the charger into the wall until all battery clamps are securely connected.

: The charger must be switched on at the mains and its own power switch before connecting to the batteries.

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Check the internal or rear fuse of the charger. If the clamps were accidentally reversed (Positive to Negative), the fuse will blow to protect the device. Replace it only with a fuse of the exact same rating.

Plug the charger into the mains and set the switch to the position. The red LED in the center should light up to indicate operation. bosch kl 1208 battery charger manual

Before connecting anything, ensure your charger matches your battery needs.

The Bosch KL 1208 is a relic of the NiCd era. For collectors, hobbyists, or professionals still using legacy Bosch 12V tools, it remains a functional charger you understand its limitations. The lack of a true "full charge" detection means you must manually monitor charge times.

Store the unit in a dry, dust-free indoor environment out of reach of children. Troubleshooting Guide Probable Cause Recommended Action Ammeter reads zero immediately No AC power or blown internal fuse Check wall outlet power; inspect the charger's fuse. Charger gets excessively hot Battery has a shorted cell Disconnect immediately; the battery requires replacement. Needle jumps erratically Poor clamp connection

Wipe the copper clamps after each use to remove trace sulfuric acid or corrosion. Never plug the charger into the wall until

Connect the clamp to the positive (+) pole and the black clamp to the negative (–) pole.

Battery acid is highly corrosive. If skin contact occurs, flush immediately with copious amounts of water.

Plug the power cord of the Bosch KL 1208 into a standard 230V grounded electrical outlet.

Disclaimer: This information is based on standard operational practices for historic Bosch charging equipment, specifically similar units like the KL1208E/ML1208E. Always refer to the specific documentation included with your unit if available. This link or copies made by others cannot be deleted

Designed exclusively for 12-volt (12V) lead-acid batteries (including standard flooded, maintenance-free, and deep-cycle types).

The manual typically begins by identifying the charger series.

Approximately 8 Amps (hence the "08" in the model name) Compatible Battery Types: 12V Lead-Acid (Wet/Flooded cells) Recommended Battery Capacities: 15 Ah to 80 Ah