HONDA S2000 - Manual (Page 203)

If additional battery maintenance is
needed, see your dealer or a
qualified technician.
Battery posts,
terminals, and related accessories
contain lead and lead compounds.
If you need to connect the battery to
a charger, disconnect both cables to
prevent damaging your vehicle’s
electrical system. Always disconnect
the negative (
) cable first, and
reconnect it last.
WARNING:
Wash your hands af ter handling.
Checking the Battery
Ma
int
e
na
nce
197
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
technician do the battery
maintenance.