Maintenance - Fysic FM-8800+ Mode D'emploi

3. During a long-time lack of use, it is
recommended to remove the battery from the
device.
4. To prevent short-circuit, it is not recommended to
place the battery on any metal surface.

10.9 Maintenance:

Only clean the telephone with a soft, slightly moist
cloth. Never use chafi ng or chemical cleaning
methods.
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