Clean the fan. Exclusive manual fix: The air channel is not just a tube—it has a one-way rubber flap inside the base. Over time, sawdust cakes this flap shut. Remove the soleplate, locate the black rubber duckbill valve, and rinse it in warm soapy water. Do not puncture it.

: Once charging is complete, disconnect the charger from the power supply first, then remove the cables from the battery.

: Select the appropriate charging mode manually using the interface. Some Bosch chargers include a "trickle charge" mode that activates automatically once the battery is full.