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• FIRST AID – SKIN: If battery acid comes in contact with skin, rinse immediately with water, then wash thoroughly with
soap and water. If redness, pain, or irritation occurs, seek immediate medical attention.
EYES: If battery acid comes in contact with eyes, flush eyes immediately, for a minimum of 15 minutes and seek
immediate medical attention.
Preparing to Charge
1. Determine voltage of battery to be maintained by referring to the vehicle manual.
2. If it is necessary to remove battery from vehicle to maintain , or to clean terminals, always remove grounded ter-
minal from battery first. Make sure all accessories in the vehicle are off, so as not to cause an arc.
3. Clean battery terminals. Do not allow corrosion to come in contact with eyes.
4. Add distilled water in each cell until battery acid reaches level specified by battery manufacturer. This helps purge
excessive gas from cells. Do not overfill and always replace caps. For a battery without cell caps (maintenance
free), carefully follow battery manufacturer's charging and maintenance instructions.
5. Study all battery manufacturer’s specific precautions, while charging, and recommended rates of charge.
6. Area around battery should be well ventilated while battery is being charged. Do not operate within an enclosed
area.
CAUTION: This battery maintainer does not detect, diagnose or analyze the condition of the battery. Attempting
to charge/maintain a battery with an abnormal condition can further damage the battery. If in doubt, have the battery
checked by a qualified professional prior to using the BM3B maintainer.
Charger Location
1. Locate battery maintainer as far away from battery as cables permit.
2. Charge above freezing temperature and below 40 degree Celsius (C) (104 degree Fahrenheit).
3. NEVER place battery maintainer directly above battery being charged; gases from battery will corrode and dam-
age charger.
4. NEVER allow battery acid to drip on battery maintainer when reading gravity or filling battery.
5. NEVER operate battery maintainer in a closed-in area or restrict ventilation in any way.
6. Marine batteries must be removed and charged on shore.
7. Do not set a battery on top of battery maintainer.
Follow these steps when the battery is installed in a vehicle. A spark near the battery may cause an explosion.
WARNING: TO REDUCE RISK OF A SPARK NEAR THE BATTERY: CONNECT AND DISCONNECT DC OUTPUT
CLAMPS AND RING TERMINALS ONLY AFTER REMOVING AC CORD FROM ELECTRIC OUTLET.
1. Position AC and DC cords away from hood, door, or moving engine parts.
2. Stay clear of fan blades, belts, pulleys, and other parts that can cause injury to persons.
3. Check polarity of battery posts. POSITIVE (POS, P, +) battery post usually has larger diameter than NEGATIVE
(NEG, N, –) post.
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 negative-grounded vehicle, connect POSITIVE (RED) clamp from battery charger to POSITIVE (POS, P, +) un-
grounded post of battery. Connect NEGATIVE (BLACK) clamp to vehicle chassis or engine block away from bat-
tery. Do not connect clip to carburetor, fuel lines, or sheet-metal body parts. Connect to heavy gauge metal part of
the frame or engine block.
6. For positive-grounded vehicle, connect NEGATIVE (BLACK) clamp from battery charger to NEGATIVE (NEG, N, –)
ungrounded post of battery. Connect POSITIVE (RED) clamp to vehicle chassis or engine block away from battery.
Do not connect clip to carburetor, fuel lines or sheet-metal body parts. Connect to a heavy gauge metal part of the
frame or engine block.
7. When disconnecting charger, disconnect AC cord, remove clamp from vehicle chassis, and then remove clamp
from battery terminal.
8. Do not charge the battery while the engine is operating.
9. Refer to battery manufacturer's instruction on battery charging/maintaining procedures.
DC Connection Precautions
1. Remove AC cord from electric outlet before connecting or disconnecting DC clamps and ring terminals.
2. Never allow clamps to touch each other.
Follow these steps when the battery has been removed from a vehicle. A spark near the battery may cause an
explosion.
WARNING: TO REDUCE RISK OF A SPARK NEAR THE BATTERY: CONNECT OR DISCONNECT DC OUTPUT
CLAMPS ONLY AFTER REMOVING AC CORD FROM ELECTRICAL OUTLET.
1. Check polarity of battery posts. Positive post (marked POS,P, +) usually has a larger diameter than the Negative
battery post (marked NEG, N, –).
4
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