Schumacher Electric SP1 Owner's Manual page 12

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
to charge a large battery, such as a marine deep-cycle battery, that
was not fully charged, you may lose some of the battery's capacity.
This would cause the large battery to be unable to hold a charge and
become useless. Therefore, we do not recommend charging a
large battery with this unit.
NOTE: The maintain mode technology utilized in Schumacher
maintainers allows you to safely charge and maintain a healthy
battery for extended periods of time. However, problems with the
battery, electrical problems in the vehicle, improper connections or
other unanticipated conditions could cause excessive current draws.
As such, occasionally monitoring your battery and the charging
process is recommended.
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