Honda 1997 Odyssey Owner's Manual page 164

If the terminals are severely cor-
roded, clean them with baking soda
and water. Then use a wrench to
loosen and remove the cables from
the terminals. Always disconnect the
negative ( — ) cable first and recon-
nect it last. Clean the battery termi-
nals with a terminal cleaning tool or
wire brush. Reconnect and tighten
the cables, then coat the terminals
with grease.
If you need to connect the battery to
a charger, disconnect both cables to
prevent damage to the car's electri-
cal system.
The battery gives off explosive
hydrogen gas during normal
operation.
A spark or flame can cause the
battery to explode with enough
force to kill or seriously hurt you.
Wear protective clothing and a
face shield, or have a skilled
mechanic do the battery
maintenance.
On the U.S. EX model
If your car's battery is disconnected
or goes dead, the audio system will
disable itself. The next time you turn
on the radio you will see "Code" in
the frequency display. Use the
Preset buttons to enter the five-digit
code (see page 106).
NOTICE
Charging the battery with the cables
connected can seriously damage your
car's electronic controls. Detach the
battery cables before connecting the
battery to a charger.
Maintenance
Battery