Ryobi BC-800 Operation manual

6986071 (STD)
01-10
BC-800

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THANK YOU FOR BUYING A RYOBI PRODUCT.
IMPORTANT: Working in vicinity of a lead-acid battery is dangerous. Batteries generate explosive
gases during normal battery operation. For this reason, it is of utmost importance that each time
before using your charger, you read this manual and follow the instructions exactly.
SAVE THESE INSTRUCTIONS FOR FUTURE USE.
GENERAL BATTERY SAFETY
1. Before you use your battery charger, be sure to read all
instructions and cautions printed on:
• Battery Charger
• Battery
• Vehicle or unit using battery
2. Use battery charger on LEAD ACID type rechargeable
batteries only, such as used in autos, trucks, tractors,
airplanes, vans, RV's trolling motors, etc. Charger is
not intended to supply power to low-voltage electrical
system other than in an automotive application.
WARNING: Do not use battery charger for charging
dry-cell batteries that are commonly used with home
appliances.
These batteries may burst and cause injury to persons
and damage to property.
3. Use only attachments recommended or sold by
manufacturer.
Use of non-recommended attachments may result in
re, electric shock, or injury.
4. When disconnecting the battery charger, pull by the
plug not by the cord. Pulling on the cord may cause
damage to cord or plug.
5. Locate battery power cord so it cannot be stepped on,
tripped over, or subjected to damage or stress.
6. Do not operate charger with damaged cord or plug.
Have cord replaced immediately.
7. Do not operate charger if it has received a sharp blow,
been dropped, or otherwise damaged in any way. Take
it to a qualied professional for inspection and repair.
8. Do not disassemble charger. Take it to a qualified
professional when service or repair is required.
Incorrect reassembly may result in electric shock or re.
9. To reduce risk of electric shock, unplug charger from
outlet before attempting any maintenance or cleaning.
10. Do not use an extension cord unless absolutely
necessary.
Use of an improper extension cord could result in re or
electric shock.
11. Always charge battery in a well ventilated area.
NEVER operate in a closed-in or restricted area without
adequate ventilation.
WARNING: Risk of explosive gas.
12. Locate charger as far away from battery as DC charger
cables permit.
13. Do not expose charger to rain or snow.
14. NEVER charge a frozen battery. If battery fluid
(electrolyte) is frozen, bring into a warm area to thaw
before charging.
15. NEVER allow battery acid to drip on charger when
reading specic gravity or lling battery.
16. NEVER set a battery on top of charger.
17. NEVER place charger directly above battery being
charged.
Gases from battery will corrode and damage charger.
18. NEVER touch the battery clips together when the
charger is energized.
19. NEVER crank engine with charger attached to battery.
PERSONAL PRECAUTIONS AND SAFETY
1. WARNING: Wear complete eye protection and clothing
protection, when working with lead-acid batteries.
2. Make sure someone is within range of your voice or
close enough to come to your aid when you work with
or near a lead-acid battery.
3. Have plenty of fresh water and soap nearby for use if
battery acid contacts skin, clothing, or eyes. If battery
acid contacts skin or clothing, wash immediately with
soap and water.
4. Avoid touching your eyes while working with a battery.
Acid particles (corrosion) may get into your eyes! If acid
enters your eye, immediately flood eye with running
cold water for at least 10 minutes. Get medical attention
immediately.
5. Remove all 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) to metal, causing a severe burn.
6. Take care not to drop a metal tool or other metal onto
the battery. Metal may cause sparking or short circuit
the battery or another electrical devise. Sparking may
cause an explosion.
7. Always operate battery charger in an open well
ventilated area.
8. NEVER smoke or allow a spark or ame in the vicinity
of the battery or engine. Batteries generate explosive
gases!

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DESCRIPTION
KNOW YOUR BATTERY CHARGER (Fig. 1)
1. Charging voltage selector - Make sure you have either a 12 volt or a 6 volt lead-acid battery and switch charging
voltage accordingly.
2. Charging current selector - You select may either quick charging or sparing charging.
[ ]:Quick charging
[ ]:Sparing charging
The smaller the battery the greater the risk of harming it by using the quick charging.
Sparing charging is recommended.
3. Red clip
4. Black clip
5. Ammeter gauge - The ammeter gives a reading of the AMP draw by the battery from the charger. When a fully
discharged battery is connected to the charger, the ammeter will read the maximum output rating of the charger.
The charge current will gradually taper down as the battery approaches full charge.
6. Knife fuse -
TECHNICAL SPECIFICATIONS
Mains voltage : 230V - 50 Hz
Rated input current : 0.45 A
Power rating : 84 W
DC 6 V DC 12 V Battery capacity
Rated charging current ( ) 5.6 A arith. / 8 A eff. 4.6 A arith. / 6.5 A eff. 20 - 120 Ah
Rated charging current ( ) 0.55 A arith. / 0.85 A eff. 0.8 A arith. / 1.2 A eff. 3.7 - 30 Ah
Fig. 1
3
4
2
1
56

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PREPARING TO CHARGE
1. Most motor vehicle manufacturers recommend that the battery should be disconnected from the vehicle’s electrical
system before being charged.
Any voltage peaks that occur may cause defects in these electronic modules. Therefore the battery should be
disconnected from the electrical system before being charged.
Always remove grounded terminal from battery first.
2. Study all battery manufacturer's specific precautions, such as removing or not removing cell caps while charging, and
recommended rates of charge.
Also refer to the instructions in the owner’s manuals for the car, radio, navigation system, etc.
3. Clean battery terminals. Take care to keep corrosion from coming in contact with your eyes.
4. If required, add distilled water in each cell until battery acid reaches levels specified by battery manufacturer. This helps
purge excessive gas from cells. Do not overfill. For a battery without cell caps, carefully follow manufacturer's recharging
instructions.
5. Be sure area around battery is well ventilated while battery is being charged. Gas can be forcefully blown away by using a
piece of cardboard or other non-metallic material as a fan.
BATTERY TYPES
Three basic types of lead-acid batteries can be given a charge with this charger:
(1) Conventional and Low Maintenance
(2) Maintenance Free
(3) Deep Cycle
Conventional and Low Maintenance Batteries.These are the antimony/lead batteries. Conventional/Low Maintenance
batteries require periodic addition of water to the acid solution (electrolyte). Additional water may be added by removing the
filler caps located on the top of the battery.
IMPORTANT: When antimony is known to be one of the materials used in the battery's construction, that battery is a Low
Maintenance/Conventional type.
CAUTION: Some Low Maintenance batteries have a relatively smooth top without any apparent battery filler caps. If, however,
the battery manufacturer/distributor recommends periodic checking of electrolyte level and provides access to the battery for
water additions, the battery is probably a Low Maintenance/Conventional type.
Maintenance Free Batteries. These are calcium/lead batteries and normally do not require water additions. Therefore, filler
caps have been removed from the battery surface. These batteries will have a smooth or sealed appearance.
Deep Cycle Batteries. These heavy duty batteries are used in boats, construction equipment, sump pumps, etc. They are
normally marked DEEP CYCLE on the outside of the case.
OPERATION
NOTE: It is important to determine the battery type before charging. (See BATTERY TYPES)
CHARGING BATTERY OUT OF VEHICLE
When charging battery out of vehicle, take care to determine the battery type. To reduce risk of a spark near battery, follow
these steps when battery is outside vehicle.
WARNING: A spark near the battery may cause battery explosion.
WARNING: When removing battery from vehicle or boat, disconnect grounded pole first. When disconnecting, make sure all
accessories are off, so as not to cause an arc.
NOTE: A marine (boat) battery must be removed and charged on shore. (To charge on board requires special equipment
designed for marine use.)
WARNING: When reinstalling battery, attach the ground post first.
1. Check polarity of battery posts. Battery case will be marked by each post: POSITIVE (POS, P, +) and NEGATIVE (NEG, N, -).
NOTE: The positive battery post usually has a larger diameter than the negative post.

6
3
4
3
4
Fig.2
Fig.4 Fig.5
Fig.3
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2. Connect red clip (3) to POSITIVE (POS, P, +) battery post. Rock clip back
and forth to make good connection. (Fig. 2)
3. Connect black clip (4) to NEGATIVE (NEG, N, -) battery post. Rock clip
back and forth to make a good connection. (Fig. 3)
WARNING: Do not face battery when making nal connection.
4. Select charging voltage by switching the charging voltage selector (1)
5. Select charging current by switching the charging current selector (2)
6. Plug charger AC cord into power outlet.
WARNING: Be sure area around battery is well ventilated while battery is being charged. Gas can be forcefully blown
away by using a piece of cardboard or other non-metallic material as a fan.
7. The charging time depends on the charge status of the battery. If the battery is fully discharged, the approximate charging
time can be calculated using the following formula :
Battery capacity in Ah
Charging time/h =
Amp. (arithmetic charging current)
24 Ah
Example = = 9.6 h max.
2,5 A
A high initial current, approximately equal to the rated current will ow in a normally discharged battery. As the charging
time increases, the charging current will fall.
Old batteries for which the charging current does not fall ara suffering form a defect, such as a cell short circuit or ageing
damage.
8. When battery is fully charged, unplug charger from AC power source.
9. When battery is fully charged and charger is unplugged, rstly remove clip
from NEGATIVE (NEG, N, -) battery post (Fig. 4), and then remove clip
from Positive (POS, P, +) battery post (Fig. 5), in that order.
SECURITY
Wrong connection of poles or short-circuit would destroy the built-in knife fuse (6).
It must be replaced with a fresh knife fuse of the same value.
On extreme overload, or overheat by a wrong use, the thermal protector will switch
off itself. The charger will switch on again after cooled down sufciently.
MAINTENANCE
Very little maintenance is required for the battery charger. Follow common sense in wiping the charger clean and store in a
clean, dry area.
1. After use, wipe all battery corrosion and other dirt or oil from clip, cord, and the charger case. Use a dry cloth.
2. Coil charger cords to prevent damage.
3. Have any cracked or frayed cords replaced by a qualied professional.
4. Store battery charger in a clean, dry area.

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TROUBLESHOOTING
PROBLEM CAUSE SOLUTION
No meter reading. Charger is not plugged in Plug in
Connections are reversed
With charger unplugged, reverse clips
and reconnect (rock back and forth to bite
in)
Poor electrical connection Clean clips and battery poles and
reconnect (roll back and forth to bite in)
AC outlet is dead Plug in a lamp or other appliance to check
for voltage
Battery is defective (not accept charge) Check battery
Knife fuse is broken Replace knife fuse
Thermal protector is switched off Wait until charger cooled down and reset
automatically
Ammeter does not taper down. Battery has problem and not fully charged. Check battery
High meter reading Battery is defective (not take a charge). Check battery
Charging current is less than full
output rating of charger.
Battery is partially charged. Continue charging.
Battery is defective (battery plates are
crusted) and not accept a full charge. Check battery and replace
AC power supply is low. Plug charger into another AC outlet.

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