Manual Makita BTW121 (page 5 of 80) (English, German, Dutch, Danish, French, Italian, Portuguese, Swedish, Spanish, Norwegian, Finnish)

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ADDITIONAL SAFETY RULES FOR TOOL

ENB025-1

1. Be aware that this tool is always in an operating

condition, because it does not have to be

plugged into an electrical outlet.

2. Hold tool by insulated gripping surfaces when

performing an operation where the cutting tool

may contact hidden wiring. Contact with a “live”

wire will also make exposed metal parts of the

tool “live” and shock the operator.

3. Wear ear protectors.

4. Check the socket carefully for wear, cracks or

damage before installation.

5. Hold the tool firmly.

6. Always be sure you have a firm footing.

7. Be sure no one is below when using the tool in

high locations.

8. The proper fastening torque may differ depend-

ing upon the kind or size of the bolt. Check the

torque with a torque wrench.

SAVE THESE INSTRUCTIONS.

OPERATING INSTRUCTIONS

Installing or removing battery cartridge (Fig. 1)

• Always switch off the tool before insertion or removal of

the battery cartridge.

• To remove the battery cartridge, withdraw it from the

tool while sliding the button on the side of the cartridge.

• To insert the battery cartridge, align the tongue on the

battery cartridge with the groove in the housing and slip

it into place. Always insert it all the way until it locks in

place with a little click. If you can see the red part on

the upper side of the button, it is not locked completely.

Insert it fully until the red part cannot be seen. If not, it

may accidentally fall out of the tool, causing injury to

you or someone around you.

• Do not use force when inserting the battery cartridge. If

the cartridge does not slide in easily, it is not being

inserted correctly.

Charging (Fig. 2)

1. Plug the battery charger into the proper A/C voltage source. Two charging lights will flash in green color repeat-

edly.

2. Insert the battery cartridge into charger until it stops adjusting to the guide of charger. Terminal cover of charger

can be opened with inserting and closed with pulling out the battery cartridge.

3. When the battery cartridge is inserted, the charging light color will change from green to red and charging will

begin. The charging light will keep lighting up lit steadily during charging. One red charging light indicates charged

condition in 0 – 80% and two red ones indicates 80 – 100%.

4. With finish of charge, the charging lights will change from two red ones to two green ones.

5. If you leave the battery cartridge in the charger after the charging cycle is complete, the charger will switch into its

“trickle charge (maintenance charge)” mode which will last approximately 24 hours.

6. After charging, unplug the charger from the power source. Refer to the table below for the charging time.

NOTE:

• The battery charger is for charging Makita-battery car-

tridge. Never use it for other purposes or for other man-

ufacturer’s batteries.

• When you charge a new battery cartridge or a battery

cartridge which has not been used for a long period of

time, it may not accept a full charge. This is a normal

condition and does not indicate a problem. You can

recharge the battery cartridge fully after discharging it

completely and recharging a couple of times.

• If you charge a battery cartridge from a just-operated

tool or battery cartridge which has been left in a loca-

tion exposed to direct sunlight for a long time, the

charging light may flash in red color. If this occurs, wait

for a while. Charging will begin after the battery car-

tridge is cooled by the cooling fan installed in the

charger. When the temperature on battery is more than

approx. 70°C, two charging lights may flash in red

color, and when approx. 50°C – 70°C, one charging

light in red color.

• If the charging light flashes alternately in green and red

color, charging is not possible. The terminals on the

charger or battery cartridge are clogged with dust or

the battery cartridge is worn out or damaged.

Cooling system

• This charger is equipped with cooling fan for heated

battery in order to enable the battery to prove its own

performance. Sound of cooling air comes out during

cooling, which means no trouble on the charger.

• Yellow light will flash for warning in the following cases.

– Trouble on cooling fan

– Incomplete cool down of battery, such as, being

clogged with dust

The battery can be charged in spite of the yellow warn-

ing light. But the charging time will be longer than usual

in this case.

• Check the sound of cooling fan, vent on the charger

and battery, which can be sometime clogged with dust.

• The cooling system is in order although no sound of

cooling fan comes out, if the yellow warning light will

not flash.

• Always keep clean the vent on charger and battery for

cooling.

• The products should be sent to repair or maintenance,

if the yellow warning light will frequently flash.

Battery type Capacity (mAh) Number of cells Charging time

BH1220 2,000 10 Approx. 30 min.

BH1233 3,300 10 Approx. 50 min.

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Makita BTW121 Manual

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