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Insert the 12V accessory plug into the 12V accessory outlet.2.
Route the power cord from the charger through the vehicle’s 3.
open window.
Plug the charger power cord into a grounded 120V AC electrical 4.
wall outlet.
Automatic Charging Mode
When an Automatic Charge is performed, the charger switches to the
Maintain Mode (see below) automatically after the battery is charged.
For a battery with a starting voltage under 0.2 volts, use a manual
chargertopre-chargethebatteryforveminutestogetadditional
voltage into the battery.
Aborted Charge
If charging cannot be completed normally, charging will abort. When
charging aborts, the charger’s output is shut off and the CHARGING
LED will blink. To reset after an aborted charge, unplug the charger
from the AC outlet, wait a few moments and plug it back in.
Desulfation Mode
Desulfation could take 8 to 10 hours. If desulfation fails, charging will
abort and the CHARGING LED will blink.
Completion of Charge
Charge completion is indicated by the CHARGED LED. When lit, the
charger has switched to the Maintain Mode of operation.
Maintain Mode (Float-Mode Monitoring)
When the CHARGED LED is lit, the charger has started Maintain
Mode. In this mode, the charger keeps the battery fully charged
by delivering a small current when necessary. If the charger has
to provide its maximum maintain current for a continuous 12 hour
period, it will go into Abort Mode (see Aborted Charge section). This
is usually caused by a drain on the battery or the battery could be
bad. Make sure there are no loads on the battery. If there are, remove
them. If there are none, have the battery checked or replaced.
Maintaining a Battery
The Schumacher SP1 is a battery maintainer that maintains both
6 and 12 volt batteries, keeping them at full charge. It can charge
small batteries and maintain both small and large batteries. If you are
maintaining a fully charged large battery, you will be properly utilizing
the battery charger. However, if you were to use this battery charger