Shimano E6100 User Manual page 44

WARNING
Check the charger, cable and plug before each use. Do not use the
charger if you detect signs of damage. Do not open the charger
yourself, and only have it repaired by qualified experts using original
spare parts. This poses a risk of fire and explosion. Damaged chargers,
cables and plugs also increase the risk of electric shock.
The charger is only intended to be used indoors. Keep the charger
away from rain and moisture. Do not use it on a damp surface. If water
gets into the charger there is a risk of electric shock. If water has
penetrated the casing, unplug the device immediately and have it
checked out by your dealer. Condensation might form on the charger
when the temperature suddenly changes from cold to warm. When this
happens, wait about an hour. This is the time a charger needs to reach
the temperature of the warm surroundings. Prevent this happening by
storing the charger where it is used.
The charger and battery may not be covered during the charging
process. Do not use the charger and battery on materials which can
catch fire easily (such as paper and textiles) or within a combustible
environment. This also applies when the battery is charged when fitted
to the pedelec. In this case, the pedelec must be positioned such that
a potential fire cannot spread quickly (exercise caution with carpeted
floors). Do not expose the battery and pedelec to direct sunshine above
40 degrees. The charger heat generated during the charge process
represents a risk of fire. When the temperature is higher than 85˚C,
or there is smoke or an unusual smell, immediately unplug the mains
connector of the charger from the socket and disconnect the battery
from the charger. An overheated battery is damaged and may not be
used again. Always stay with the charger when it is in use.
EN-44 Original User Guide | Pedelec Shimano Steps Version 1
WARNING
Keep battery chargers away from sparks and fires. It can explode
causing severe burns and fires. Further consequences can include
malfunctions and a reduced service life. Ensure there is adequate
ventilation for charging.
IMPORTANT
The mains voltage must match the supply voltage of the battery
charger, otherwise there is a risk of damage to the device. The supply
voltage for the charger is specified on the label on the back of the
device.
Do not charge batteries for a long period if they are already fully
charged or are not being used. Electrical storms, voltage fluctuations
and short circuits can damage the battery.
Keep the battery charger clean. If the contacts are dirty, the dirt can
burn during charging, leaving burn marks. The charger may need to be
replaced in such cases  6.4.1 Cleaning Page EN-47.