• When working with lead acid batteries, always make sure immediate assistance is available in case
of accident or emergency.
• Always have protective eyewear when using this product: contact with battery acid may cause
blindness and/or severe burns. Be aware of first aid procedures in case of accidental contact with
battery acid.
• Have plenty of fresh water and soap nearby in case battery acid contacts skin.
• If battery acid contacts skin or clothing, wash immediately with soap and water for at least 10
minutes and get medical attention immediately.
• Never smoke or allow a spark or flame in vicinity of vehicle battery, engine or charger.
• Remove personal metal items such as rings, bracelets, necklaces and watches when working with a
lead acid battery. A lead acid battery can produce a short circuit current high enough to weld a ring,
or the like of a metal, causing a severe burn.
• Never allow battery acid to come in contact with this unit.
• Do not operate this unit in a closed area or restrict ventilation in any way.
• 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.
LCD LIqUID CRYSTAL DISPLAY: If liquid crystal comes in contact with your skin: Wash area off
completely with plenty of water. Remove contaminated clothing. If liquid crystal gets into your
eye: Flush the affected eye with clean water and then seek medical attention. If liquid crystal is
swallowed: Flush your mouth thoroughly with water. Drink large quantities of water and induce
vomiting. Then seek medical attention.
• GROUNDING AND AC POWER CORD CONNECTION INSTRUCTIONS – Charger should be grounded
to reduce risk of electric shock. Charger is equipped with an electric cord having an equipment-
grounding conductor and a grounding plug. The plug must be plugged into an outlet that is properly
installed and grounded in accordance with all local codes and ordinances.
The battery charger is for use on a nominal 120 volt circuit, and has a grounding plug that looks like the
plug illustrated in Figure A. A temporary adapter, which looks like the plug illustrated in Figures B and C
may be used to connect this plug to a two-pole receptacle as shown in Figure B if a properly grounded
outlet is not available. The temporary adapter should be used only until a properly grounded outlet can
be installed by a qualified electrician.
DANGER – Before using adapter as illustrated, be certain that the center screw of the outlet is
grounded. The green-colored rigid ear or lug extending from the adapter must be connected to a properly
grounded outlet. Make certain it is grounded. If necessary, replace the original outlet cover plate screw
with a longer screw that will secure adapter ear or lug to outlet cover plate and make ground connection
to grounded outlet.
DANGER – Never alter AC cord or plug provided – if it will not fit outlet, have proper outlet
installed by a qualified electrician. Improper connection can result in a risk of an electric shock.
Preparing to Charge
1. Determine voltage of battery to be charged by referring to the vehicle manual.
2. If it is necessary to remove battery from vehicle to charge, or to clean terminals, always remove
grounded terminal 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.
BCS25EB_ManualEnFrSP_102110.indd 4-5
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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. For a battery without cell caps
(maintenance free), carefully follow manufacturer's charging instructions.
5. Study all battery manufacturer's specific precautions, such as removing or not removing cell caps
while charging, and recommended rates of charge.
6. Remove battery completely from boat/airplane or any confined area before charging.
Charger Location
1. Locate charger as far away from battery as cables permit.
2. NEVER place charger directly above battery being charged; gases from battery will corrode and
damage charger.
3. NEVER allow battery acid to drip on charger when reading gravity or filling battery.
4. NEVER operate charger in a closed-in area or restrict ventilation in any way.
5. Marine batteries must be removed and charged on shore.
6. Do not set a battery on top of charger.
Charger Clamp Connection Precautions
1. Connect and disconnect clamps only after removing AC cord from electric outlet.
2. Never allow clamps to touch each other.
3. Attach clamps to battery and chassis as indicated in "Battery Installed in Vehicle" steps 5 and 6,
and in "Battery Outside of Vehicle" steps 2, 4 and 5.
CAUTION: A spark near the battery may cause an explosion. Follow these steps to reduce the
risk of a spark near the battery when the battery is installed in a vehicle:
1. Position AC and clamp 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, +) ungrounded post of battery. Connect NEGATIVE (BLACK) 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 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. See operating instructions for length of charge information.
CAUTION: A spark near the battery may cause an explosion. Follow these steps to reduce the risk of
a spark near the battery when the battery has been removed from a vehicle:
1. Check polarity of battery posts. Positive post (marked POS,P, +) usually has a larger diameter than
the Negative battery post (marked NEG, N, –).
2. Attach a 24-inch (minimum length) #6 AWG insulated battery cable to the NEGATIVE battery post
(marked NEG, N, –).
3. Connect the POSITIVE (RED) battery clamp to the POSITIVE battery post (marked POS, P, + or
red).
4. Stand as far back from the battery as possible, and do not face battery when making final
connection.
5. Carefully connect the NEGATIVE (BLACK) charger clamp to the free end of the battery cable
connected to the NEGATIVE terminal.
6. Set the charge rate to appropriate setting according to battery size.
7. When disconnecting charger, always do so in reverse sequence of connecting procedure and
break first connection while as far away from battery as practical.
Note:
A marine (boat) battery must be removed and charged on shore. To charge it on board requires equipment specially
designed for marine use. This unit is NOT designed for such use.
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