Schumacher SE-1-12S Owner's Manual page 11

4. The POWER ON (green) LED will light when the AC cord is
properly connected. When the battery is charged, the CHARGED
(red) LED will light.
5. To disconnect, reverse the procedure.
NOTE: This charger is equipped with an auto-start feature. Current
will not be supplied to the ring terminals until a battery is properly
connected. Meaning, the clips will not spark if touched together.
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 1 volt, use a manual
charger to pre-charge the battery for five minutes to get additional
voltage into the battery.
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 battery voltage drops
below a preset level, the charger will go back into Charge Mode until
the battery voltage returns to the full charge level, at which point the
charger will return to Maintain Mode.
NOTE: The charger automatically switches between Charge Mode
and Maintain Mode as necessary. The CHARGED LED will cycle
on when the battery is at full charge and off when the voltage drops
below a preset level and the charger goes into Charge Mode. This
cycle will continue, and the CHARGED LED will stay on for longer
periods of time as the battery becomes more fully charged.
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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