Maxcom MS453, User Manual

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Leaving the battery in excessively hot or cold places will
reduce the battery life. The recommended storage
temperature range is between 15°C and 25°C. Installing a cold
battery into the phone might cause the phone to malfunction
and might damage the phone.
A Li-ion battery is included in the set. Old
batteries pose environmental risks. They
should be disposed of at a special place in a
special container in compliance with current
regulations. Never throw old batteries or chargers to
municipal solid waste, they should be collected for disposal.
NEVER PUT BATTERIES NOR CHARGERS INTO FIRE!