Schumacher SP1 Owner's Manual page 11

NOTE: This charger is equipped with an auto-start feature. Current
will not be supplied to the battery clips until a battery is properly
connected. Meaning, the clips will not spark if touched together.
Using The Quick-disconnect Cable Connectors
Connect any of the three output cable assemblies to the charger.
Make sure to place the charger on a dry, non-flammable surface like
metal or concrete.
NOTE: Never connect the clamp and ring terminal connectors
together for use in other applications, such as external battery or
other power source charging, or to extend the output cable length, as
reverse polarity and/or overcharge conditions will occur.
50 Amp Battery Clips
1. Connect the end of the charger output cable to the end of the
50 Amp Battery clips cable.
2. Follow the steps in sections 6 and 7 to connect the output clips
to the battery.
3. After a good electrical connection is made to the battery, plug
the power cord into a grounded 120V AC electrical wall outlet.
Permanent Ring Connectors
1. To permanently attach to a battery, loosen and remove each nut
from the bolt at the battery terminal.
2. Connect the red POSITIVE connector ring to the POSITIVE
battery terminal.
3. Connect the black NEGATIVE connector ring to the NEGATIVE
battery terminal.
4. Replace and tighten the nuts to secure.
5. Connect the cable to the end of the charger output cord. Take
care to keep the wires and plug away from metal and moving
parts.
6. Plug the charger power cord into a grounded 120V AC electrical
wall outlet.
12V Accessory Plug
1. Connect the end of the 12V Accessory Plug Cable Quick-
Connect to the charger.
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