Kalkhoff IMPULSE EVO Originalbetriebsanleitung Seite 197

9.4.3 Cleaning
DANGER
If you wipe the battery avoid touching the contacts, otherwise there is
the risk of an electric shock.
WARNING
Remove the battery from the pedelec before cleaning. Unintentionally
pressing the button represents a risk of injury.
CAUTION
Batteries must not be immersed in water. This presents a risk of
explosion. Do not extinguish a burning battery with water, only the
surrounding burning material. Fire extinguishers with metal fire
powder (Class D) are more suitable. If it is possible to take the battery
safely outside, smother the fire with sand. But you need not be afraid
of the battery exploding under you when you ride the cycle through
rain. The battery is sealed to prevent moisture and spray water from
entering.
EN-90 Original User Guide | Pedelec Impulse Evo / Impulse Evo Next Version 4
IMPORTANT
Do not spray the battery with a water hose or wash it with a high-
pressure cleaner. Damage to the battery may still result even though
the components are sealed. Clean the battery with a soft, damp cloth.
Do not use any cleaners which contain alcohol or solvent, or which
scour. No coarse sponges or brushes may be used either. They leave
scratches and cause the surface to become matt. Clean the battery
with a soft, damp cloth.
Do not allow dirt to dry out. It is best to clean the battery
immediately after your ride.
1. Remove the battery from the pedelec.
2. Clean the casing with a slightly damp, soft cloth.
3. If the battery terminals are dirty, clean them with a dry, soft cloth.