Honda EM25 Manuel De L'utilisateur page 31

DC Application
The DC receptacle may be used for charging 12 volt automotive-type
batteries only.
1.Connect the charging cables to the DC receptacle of the generator
and then to the battery terminals.
• To prevent the possibility of creating a spark near the battery,
connect charging cable first to the generator, then to the battery.
Disconnect cable first at the battery.
• Before connecting charging cables to a battery that is installed in a
vehicle, disconnect the vehicles grounded battery cable. Reconnect
the vehicle's grounded battery cable after the charging cables are
removed. This procedure will prevent the possibility of a short circuit
and sparks if you make accidental contact between a battery terminal
and the vehicle's frame or body.
CAUTION:
• Do not attempt to start an automobile engine with the generator still
connected to the battery. The generator may be damaged.
• Connect the positive charging lead (red) to the positive battery
terminal. Do not reverse the charging leads, or serious damage to the
generator and/or battery may occur.
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BATTERY CHARGING CABLE
(SOLD SEPARATELY)
BLACK LEAD
RED LEAD