HAGENUK Fono DS300 Mode D'emploi page 39

The battery should be fully charged before starting up the mobile phone.
Use only the supplied power pack for that or the approved vehicle charging
adapter.
Use only the supplied battery or the approved substitute type. Appropriate
instructions are available from your dealer or from the service hotline.
The usage of other charging adapters or batteries may possibly invalidate
the authorisation or guaranty/warranty and may have dangerous conse-
quences.
Connect the mobile telephone to the AC charger.
USB charger
If the battery is completely discharged, it may take a few minutes before
the telephone indicates that it is being charged and that it can be used
for calls.
The telephone will indicate when the charging process has been comple-
ted.
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