A: Not recommended. The KL 1208 uses a fixed timer. NiMH batteries require negative delta V detection to stop charging. Overcharging NiMH in this unit can cause leakage or explosion.
Connect the to the positive terminal of the battery.
Always disconnect the AC mains plug from the wall outlet before connecting or disconnecting the charger clamps to the battery terminals. This prevents dangerous sparking.
Store the unit in a dry, dust-free environment. Moisture can rust internal transformers. bosch kl 1208 battery charger manual
The built-in analog display needle (ammeter) on the front panel indicates the charging current:
This comprehensive guide serves as an expanded manual and operational reference for the Bosch KL 1208 workshop battery charger. Technical Specifications and Overview
Connect the positive (+) terminal to the positive pole and the BLACK negative (–) terminal to the negative pole. Plug the unit into the mains supply and switch it on. Battery Testing : A: Not recommended
This usually indicates reverse polarity. Double-check that the red clamp is on the positive (+) terminal and the black clamp is on the negative (-) terminal. Maintenance and Storage
Store in a dry place to prevent internal components from rusting.
: For standard "wet" batteries, check that the fluid level covers the lead plates by at least 5mm before charging; top up with distilled water if needed. Temperature : Avoid using the charger in environments hotter than 35°C (95°F) or in moist rooms. electronic power systems pty. ltd. Overcharging NiMH in this unit can cause leakage
The charger will automatically begin the charging process, indicated by an LED or indicator light.
In the world of power tools, Bosch has long been a benchmark for reliability and engineering. Among its legacy of battery chargers, the holds a special place as a straightforward, no-nonsense unit designed for older Bosch NiCd and NiMH battery packs. While newer lithium-ion chargers dominate today’s shelves, many workshops still rely on the trusty KL 1208. If you’ve found one without a manual—or simply want to understand it better—you’ve come to the right place.