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Preparing to Charge
1. Determine voltage of battery to be maintained by referring to the
vehicle manual.
WARNING – To prevent damage to a battery or the battery
charger, please make sure you select the correct voltage setting
(6V or 12V) for the application.
2. Be sure the area around battery is well ventilated while the battery
is being charged.
3. Remove the battery completely from a boat/airplane or any confined
area before charging.
4. If it is necessary to remove battery from a vehicle to charge or to
clean terminals, always remove the grounded terminal from the
battery first. Make sure all accessories in the vehicle are turned
off, so as not to cause an electrical arc.
5. Clean the battery terminals, taking care to avoid getting corrosive
material in your eyes.
6. Add distilled water in each cell until battery acid reaches the
level specified by the battery manufacturer. This helps purge
excessive gas from cells. Do not overfill. For a battery without cell
caps (maintenance free), carefully follow manufacturer’s charging
instructions.
7. Study all battery manufacturer’s specific precautions, such
as removing or not removing cell caps while charging, and
recommended rates of charge.
CHARGER LOCATION
• Locate the charger as far away from the battery as cables permit.
• Never place the charger directly above the battery being charged;
gases from the battery will corrode and damage the charger.
• Never allow battery acid to drip on the charger when reading gravity
or filling the battery.
• Never operate the charger in a closed-in area or restrict ventilation
in any way.
• A marine (boat) battery must be removed and charged on shore.
To charge it on board requires equipment specifically designed for
marine use. This unit is NOT designed for such use.
CONNECTING THE CHARGER
CONNECTION PRECAUTIONS
• Connect and disconnect output clamps only after removing AC Power
Cord from electric outlet.
• Never allow the clamps to touch each other.
• Attach the clamps to the battery and chassis as indicated in the
appropriate section (“Charging a battery installed in a vehicle” or
“Charging a battery that has been removed from a vehicle”).
CHARGING A BATTERY INSTALLED IN A VEHICLE
WARNING – A spark near the battery may cause an explosion. To
reduce risk of a spark near the battery:
1. Position AC and clamp cords to reduce risk of damage by hood,
door, or moving engine part.
2. Stay clear of fan blades, belts, pulleys, and other parts that can
cause injury to persons.
3. Check polarity of the battery posts. The positive post (marked
POS, P, +) usually has a larger diameter than the negative battery
post (marked NEG, N, –).
4. Determine which post of battery is grounded (connected) to
the chassis. If negative post is grounded to chassis (as in most
vehicles), see 5. If positive post is grounded to the chassis, see 6.
5. For a negative-grounded vehicle, connect the positive (red) clamp
from the battery charger to the positive (POS, P, +) ungrounded
post of battery. Connect the negative (black) clamp to vehicle
chassis or engine block away from battery. Do not connect clip to
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