Schumacher SI263 - Manual (Page 19)

6. To select the desired charge rate and battery voltage, press
the appropriate CONTROL BUTTONS. The CHARGING
(yellow) LED illuminates when the charging process begins.
If the CHECK (red) LED illuminates, check for correct cable
connections.
7. To disconnect the Battery Manager, unplug its power cord
before attempting to disconnect the Battery Manager clamps.
While standing away from the battery, remove the output
clamp from the NEGATIVE battery post. Finally, remove the
output clamp from the POSITIVE battery post.
8. Clean and store the Battery Manager in a dry location.
Charging a Removed Battery
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