5
ADDITIONAL SAFETY RULES FOR
CHARGER & BATTERY CARTRIDGE
1. Do not charge battery cartridge when tempera-
ture is BELOW 10°C (50°F) or ABOVE 40°C
(104°F).
2. Do not attempt to use a step-up transformer, an
engine generator or DC power receptacle.
3. Do not allow anything to cover or clog the
charger vents.
4. Do not short the battery cartridge:
(1) Do not touch the terminals with any conduc-
tive material.
(2) Avoid storing battery cartridge in a container
with other metal objects such as nails, coins,
etc.
(3) Do not expose battery cartridge to water or
rain.
A battery short can cause a large current flow,
overheating, possible burns and even a break-
down.
5. Do not store the tool and battery cartridge in
locations where the temperature may reach or
exceed 50°C (122°F).
6. Do not incinerate the battery cartridge even if it
is severely damaged or is completely worn out.
The battery cartridge can explode in a fire.
7. Be careful not to drop, shake or strike battery.
8. Do not charge inside a box or container of any
kind. The battery must be placed in a well venti-
lated area during charging.
SAVE THESE INSTRUCTIONS
FUNCTIONAL DESCRIPTION
CAUTION:
Always be sure that the tool is switched off and the bat-
tery cartridge is removed before adjusting or checking
function on the tool.
Installing or removing battery cartridge
• Always switch off the tool before insertion or removal of
the battery cartridge.
• Do not use force when inserting the battery cartridge. If
the cartridge does not slide in easily, it is not being
inserted correctly.
For models BFT120 (F) (Fig. 1)
• To remove the battery cartridge, withdraw it from the
tool while pressing the buttons on both sides of the car-
tridge.
• 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 not, it may accidentally fall out
of the tool, causing injury to you or someone around
you.
For model BFT121F (Fig. 2)
• 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.
Charging
Before using battery charger, read all instructions and
cautionary markings on the battery charger.
Tips for maintaining maximum battery life
1. Always stop tool operation and charge the battery
cartridge when you notice that the LED indicator
lightened up.
2. Never recharge a fully charged battery cartridge.
Overcharging shortens the battery service life.
3. Charge the battery cartridge with room temperature
at 10°C – 40°C (50°F – 104°F).
Let a hot battery cartridge cool down before charg-
ing it.
4. Charge the Nickel Metal Hydride battery cartridge
when you do not use it for more than six months.
Refresh charging
• Refreshing adapter (optional accessory) can refresh an
inactive battery cartridge.
• Refresh charging should be done once a week.
• When you charge a new battery cartridge or a battery
cartridge that has not been used for a long time, it may
not accept a full charge. In this case, refresh charging
must be done. The battery cartridge may decrease the
tool performance, because the chemical substance of
the battery cartridge is inactive.
Checking the remaining battery capacity
For Battery 9020A/9033A (Fig. 3)
When charging
When the charging begins, the first (far left) indicating
lamp begins to flicker. Then, as charging proceeds, the
other lamps light, one after the other, to indicate the bat-
tery capacity.
When using
When the tool is switched on, the lamps will light to indi-
cate the remaining battery capacity. When the tool is
switched off, the light goes out. If the battery has not
been used for a long time, or is needed refresh charging,
the orange lamp begins to flicker.
Use Makita refreshing adapter to refresh the battery.
CAUTION:
A battery cartridge extracted from the charger that has
been unplugged with the battery cartridge inserted does
not indicate the battery capacity due to its protective
function even if the tool is switched on after the battery
insertion into the tool. At this time, recharge it for about
five seconds before use.
NOTE:
Please contact Makita Authorized or Factory Service
Center if the warning lamp of the battery cartridge does
not light up when using or charging.
Switch action (Fig. 4)
CAUTION:
Before inserting the battery cartridge into the tool, always
check to see that the switch trigger actuates properly and
returns to the “OFF” position when released.
To start the tool, simply pull the switch trigger. Release
the switch trigger to stop.
