4
IMPORTANT SAFETY 
INSTRUCTIONS FOR BATTERY 
CARTRIDGE ENC004-1
1. Before using battery cartridge, read all instruc-
tions and cautionary markings on (1) battery 
charger, (2) battery, and (3) product using battery.
2. Do not disassemble battery cartridge.
3. If operating time has become excessively shorter, 
stop operating immediately. It may result in a risk 
of overheating, possible burns and even an explo-
sion.
4. If electrolyte gets into your eyes, rinse them out 
with clear water and seek medical attention right 
away. It may result in loss of your eyesight.
5. Always cover the battery terminals with the bat-
tery cover when the battery cartridge is not used.
6. 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.
7. Do not store the tool and battery cartridge in loca-
tions where the temperature may reach or exceed 
50°C (122°F).
8. 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.
9. Be careful not to drop or strike battery.
SAVE THESE INSTRUCTIONS
Tips for maintaining maximum battery life
1. Charge the battery cartridge before completely 
discharged. Always stop tool operation and 
charge the battery cartridge when you notice less 
tool power.
2. Never recharge a fully charged battery cartridge. 
Overcharging shortens the battery service life.
3. Charge the battery cartridge with room tempera-
ture at 10°C - 40°C (50°F - 104°F). Let a hot battery 
cartridge cool down before charging it.
4. Charge the Nickel Metal Hydride battery cartridge 
when you do not use it for more than six months.
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 
(Fig. 1)
• Always switch off the tool before insertion or removal of 
the battery cartridge.
• To remove the battery cartridge, pull out the set plate 
on the tool and grasp both sides of the cartridge while 
withdrawing it from the tool.
• To insert the battery cartridge, align the tongue on the 
battery cartridge with the groove in the housing and slip 
it into place. Snap the set plate back into place. Be sure 
to close the set plate fully before using the tool to pre-
vent the battery cartridge from accidentally falling out of 
the tool.
• Do not use force when inserting the battery cartridge. If 
the cartridge does not slide in easily, it is not being 
inserted correctly.
Switch action (Fig. 2)
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. Tool speed 
is increased by increasing pressure on the switch trigger. 
Release the switch trigger to stop.
Reversing switch action (Fig. 3)
This tool has a reversing switch to change the direction of 
rotation. Move the reversing switch lever to the A side for 
clockwise rotation or the B side for counterclockwise rota-
tion.
When the reversing switch lever is in the neutral position, 
the switch trigger cannot be pulled.
CAUTION:
• Always check the direction of rotation before operation.
• Use the reversing switch only after the tool comes to a 
complete stop. Changing the direction of rotation 
before the tool stops may damage the tool.
• When not operating the tool, always set the reversing 
switch lever to the neutral position.
Speed change (Fig. 4)
To change the speed, first switch off the tool and then 
slide the speed change lever to the “II” side for high speed 
or “I” side for low speed. Be sure that the speed change 
lever is set to the correct position before operation. Use 
the right speed for your job.
CAUTION:
• Always set the speed change lever fully to the correct 
position. If you operate the tool with the speed change 
lever positioned halfway between the “I” side and “II” 
side, the tool may be damaged.
• Always make sure that the gear is engaged properly by 
running the tool under no load after sliding the speed 
change lever to the desired speed position. If you oper-
ate the tool with the gear engaged improperly, the tool 
may be damaged.