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With the exception of AGM and gel cell
batteries, all other battery types may or
may not have vent caps. Vent caps are
located on top of the battery and provide a
means to add distilled water when needed.
Batteries should be marked with their type.
If charging a battery that is not marked,
check the manual of the item that uses the
battery. If the battery type is unknown, use
the 12V REGULAR setting. Make sure the
battery complies with the safety instructions
on page 3.
CHARGE START BUTTON
Use this button to set the maximum charge
rate to one of the following.
• SMALL BATTERY: Provides a charge
rate of up to 2A. Intended for charging
small batteries such as those commonly
used in garden tractors, snow mobiles
• REGULAR BATTERY: Provides a
charge rate of up to 10A or 20A depend-
ing on the battery. Use for charging
normal or large batteries. Not intended
for industrial applications.
• ENGINE START: Provides 75 amps for
cranking an engine with a weak or run
down battery. Always use in combination
with a battery.
• OFF: Charger returns to tester mode
and the SMALL BATTERY, REGULAR
BATTERY and ENGINE START LEDs
all stay OFF.
DIGITAL DISPLAY BUTTON
Use this button to set the function of the
digital display to one of the following.
• BATTERY %: The digital display shows
an estimate of the percent of charge of
the battery connected to the charger
• VOLTAGE: The digital display shows the
voltage at the charger battery clamps in
• ALTERNATOR %: The digital display
shows an estimated percentage of the
output of the vehicle charging system
connected to the charger battery clamps
as compared to a properly functioning
BATTERY TYPE BUTTON
Use this button to set the type of battery to
be charged to one of the following.
• 12V REGULAR: This is the type of
battery usually used in cars, trucks,
and motorcycles. These batteries have
vent caps and are often marked “low
maintenance” or “maintenance-free”.
• 12V DEEP CYCLE: Deep cycle batter-
ies are usually marked as “deep cycle”
or “marine”. Deep cycle batteries are
usually larger than the other types.
• 12V AGM/GEL: AGM and gel cell bat-
teries have sealed cases without vent
caps. Such batteries are often smaller
than the other types.
2 AMP SMALL BATTERY
10 20 AMP REGULAR BATTERY
75 AMP ENGINE START