Schumacher SE-1-12S Owner's Manual page 8

6.9 See CALCULATING CHARGE TIME for length of charge
information.
7. FOLLOW THESE STEPS WHEN BATTERY iS OUTSidE
VEHiCLE
7.1 Check the polarity of the battery posts. The POSITIVE (POS, P, +)
battery post usually has a larger diameter than the NEGATIVE
(NEG, N, -) post.
7.2 Attach at least a 24-inch (61 cm) long 6-gauge (AWG) (13 mm
insulated battery cable to the NEGATIVE (NEG, N, -) battery post.
7.3 Connect the POSITIVE (RED) charger ring terminal to the
POSITIVE (POS, P, +) post of the battery.
7.4 Position yourself and the free end of the cable you previously
attached to the NEGATIVE (NEG, N, -) battery post as far away
from the battery as possible – then connect the NEGATIVE
(BLACK) charger ring terminal to the free end of the cable using a
nut and bolt through both ring terminals.
7.5 Do not face the battery when making the final connection.
7.6 Connect the charger AC supply cord to the electrical outlet.
7.7 When disconnecting the charger, always do so in the reverse
order of the connecting procedure and break the first connection
while as far away from the battery as practical.
7.8
A marine (boat) battery must be removed and charged on shore.
To charge it onboard requires equipment specially designed for
marine use.
A SPARK NEAR THE
BATTERY MAY CAUSE A
BATTERY EXPLOSiON.
TO REdUCE THE RiSK
OF A SPARK NEAR THE
BATTERY.
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