The Bosch KL 1208 is a "manual" charger. Unlike modern smart chargers, it may not have an automatic shut-off feature. Do not leave the battery connected indefinitely, as this can lead to overcharging and "boiling" the battery acid.
: For standard (non-maintenance-free) batteries, unscrew all screw plugs to allow gases to escape. Bosch Kl 1208 User 39-s Manual
| Problem | Likely Cause (From Manual) | Solution | | :--- | :--- | :--- | | | Worn carbon brushes | Replace brushes (part number 1615430005, common to many Bosch trimmers) | | Bit slips during cutting | Collet nut not tight enough or dirty collet | Clean collet with isopropyl alcohol; retighten to 8-10 Nm (spec in manual) | | Excessive vibration | Bit is unbalanced or bent | Replace bit; never use a bit larger than 1-inch diameter (per manual) | | Depth won’t hold | Depth clamp lever is worn or not fully tightened | Check the nylon clamp pad; replace if cracked (part number 2610387264) | | Dust blows toward user | Dust hood missing or vacuum adapter installed backward | Refer to manual diagram for correct hood orientation | The Bosch KL 1208 is a "manual" charger