Silvercrest SPC KE500 A1 Operation And Safety Notes page 11

Always replace the whole set of batteries at one time, taking
care not to mix old and new ones, or batteries of different types,
capacities, or manufacturers.
Never heat batteries in order to revive them.
Never charge a battery unless the battery label specifically states
the battery is rechargeable. Charging a non-rechargeable battery,
may result in leakage, fire, or explosion.
Do not drop or subject the cell or battery to strong mechanical
shock.
Batteries should not be disassembled, crushed, punctured, or
otherwise mutilated. Such abuses may result in leakage, fire, or
explosion.
Do not dispose of the battery in a fire. Failure to observe this
precaution may result in an explosion.
Dispose of batteries properly and in accordance with government
regulations.
RISK OF PROPERTY DAMAGE
Check the product before every use! Discontinue use if any
damage to the product is detected!
This product does not contain any parts which can be serviced by
the user.
Do not place burning candles or other open fire on or next to the
product.
Sudden temperature changes may cause condensation inside the
product. In this case, allow the product to acclimate for some time
before using it again to prevent short circuits!
US-EN 11