OPERATOR'S MANUAL
Cat. No.
M18B
Cat. No.
M18BX
Cat. No.
M12-18C
Cat. No.
M12B
New batteries must be charged before
first use.
Cat. No.
M12BX
M12™ / M18™ MULTI VOLTAGE CHARGER
M12™ AND M18™ Li-ION BATTERY PACKS
TO REDUCE THE RISK OF INJURY, USER MUST READ AND UNDERSTAND OPERATOR'S
MANUAL.
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SPECIFICATIONS
Charger
Cat. No.
M12-18C
AC Input
Volts
220-240
AC Input
Amps
1.15
DC Output
Volts
DC Output
Battery Cat. No. DC Volts
Amps
18
18
12
12
M18B
12 or 18V
3
M18BX
M12B
M12BX
FUNCTIONAL DESCRIPTION
SYMBOLOGY
8
Volts Direct Current
6
7
Volts Alternating Current
Double Insulated
5
Hertz
6
1
2
5
1
2
4
3
1. Contacts
2
2. Release buttons
3. Fuel Gauge button
4. Fuel Gauge
5. Electrical contacts
6. Bay
7. Vents
8. Light indicators:
Continuous red: Charging
Continuous green light: Charging is complete
Fast flashing red: Battery is too hot/cold - Charging
will begin when battery reaches correct
charging temperature
Slow flashing red: Battery charge is pending - Charg-
ing will begin when the first pack is
fully charged
Flashing red/green: Damaged or faulty battery pack
3
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MILWAUKEE LITHIUM-ION BATTERY PACKS
18 V 12V AND 18 V
Fuel Gauge
Maintenance and Storage
Use the Fuel Gauge to determine the battery pack's Do not expose your battery pack or cordless tools
remaining run time. Press the Fuel Gauge button to to water or rain, or allow them to get wet.This could
display the lights. The Fuel Gauge will light up for damage the tool and battery pack. Do not use oil
2-3 seconds. When less than 10% of charge is left, or solvents to clean or lubricate your battery pack.
1 light on the fuel gauge will flash slowly.
The plastic casing will become brittle and crack,
causing a risk of injury.
Approximate Run
Time Remaining
78-100%
Store battery packs at room temperature away from
moisture. Do not store in damp locations where cor-
rosion of terminals may occu.r.As with other battery
pack types, permanent capacity loss can result if
the pack is stored for long periods of time at high
temperatures (65°C). MILWAUKEE Lithium-
Ion battery packs maintain their charge during
storage longer than other battery pack types. After
about a year of storage, charge the pack as normal.
55-77%
33-54%
10-32%
Less than 10% if bottom light is flashing
Do not keep topping up the battery without using
the battery pack. Run down to 50% (2 lights) at
least every six (6) months.
NOTE: If the Fuel Gauge doesn't appear to be
working, place the battery pack on the charger and
charge as needed.
Compared to NiCd battery pack types, MILWAUKEE
Lithium-Ion battery packs deliver fade-free power
for their entire run time.The tool will not experience
a slow, gradual loss of power as you work.To signal
the end of discharge, 1 light on the fuel gauge will
flash quickly for 2-3 seconds and the tool will not
run. Charge the battery pack.
WARNING To reduce the risk of injury
or explosion, never burn or incinerate a
battery pack even if it is damaged, dead or
completely discharged. When burned, toxic
fumes and materials are created.
NOTE: Immediately after using the battery pack,
the Fuel Gauge may display a lower charge than
it will if checked a few minutes later. The battery
cells "recover" some of their charge after resting.
Disposing of MILWAUKEE Li-Ion Battery Packs
MILWAUKEE Lithium-Ion battery packs are more
environmentally friendly than some other types of
power tool battery packs (e.g., nickel-cadmium).
Always dispose of your battery pack according to
federal, state and local regulations. Contact a re-
cycling agency in your area for recycling locations.
Even discharged battery packs contain some
energy. Before disposing, use electrical tape to
cover the terminals to prevent the battery pack from
shorting, which could cause a fire or explosion.
Battery Pack Protection
To protect itself from damage and extend its life, the
battery pack’s intelligent circuit monitors current draw
and temperature. In extremely high torque, binding,
stalling, and short circuit situations, the battery pack
will turn OFF the tool if the current draw becomes
too high.All the fuel gauge lights will flash. Release
the trigger and restart.
Under extreme circumstances, the internal tem-
perature of the battery could become too high. If
this happens, the fuel gauge lights will flash in an
alternating pattern and the tool will not run. Allow
the battery to cool down.
Fuel Gauge Lights Diagnosis
Solution
Lights 1 - 4 Solid Remaining run time Continue working
1 Light, flashing slowly Less than 10% run
Prepare to charge pack
Charge pack
time left
1 Light, flashing quickly End of discharge
Lights 1-4, flashing
quickly
Current draw too high Release trigger and restart,
reduce pressure
Lights 1&3 / 2&4,
flashing alternatingly
Battery temperature Release trigger and allow
too high
battery to cool
Cold Weather Operation
MILWAUKEE M18 LITHIUM-ION battery packs can
be used in temperatures down to 0°C . When the
battery pack is very cold, put the battery pack on
a tool and use the tool in a light application. It may
“buzz” for a short time until it warms up. When the
buzzing stops, use the tool normally.
4
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MILWAUKEE LITHIUM-ION COMBO CHARGER
Charging a Hot or Cold Battery Pack
WARNING Charge only MILWAUKEE
The Red Flashing Indicator light on the charger
indicates that the battery pack temperature is out-
side the charging range. Once the battery pack is
within the acceptable range, normal charging will
take place and the red light will be continuous. Hot
or cold batteries may take longer to charge.
12V and 18 V Li-Ion batteries in the
MILWAUKEE 12 and 18 V Li-Ion Combo
Charger. Other types of batteries may cause
personal injury and damage.
When to Charge the Battery Pack with this
MILWAUKEE Charger
Li-Ion Charging Status
Remove the battery pack from the tool for
charging when convenient for you and your job.
MILWAUKEE batteries do not develop a "memory"
when charged after only a partial discharge. It is
not necessary to run down the battery pack before
placing it on the charger.
Battery Pack
Temperature
Red Charger
Charging Status
Indicator Light
Too Hot
Normal Range Continuous
Too Cold Fast Flashing
Fast Flashing
Not charging
Normal charging
Not charging
• Use the Fuel Gauge (on the battery pack or tool)
Powering the Charger with an Inverter or
to determine when to charge yourMILWAUKEE Li- Generator
Ion battery pack.
The charger will operate with most generators and
inverters rated at 300 Watts or higher.
• You can "Top-Off" your battery pack's charge
before starting a big job or long day of use.
• The only time it is necessary to charge the
MILWAUKEE Lithium-Ion battery pack is when the
battery pack has reached the end of its charge
or after the job is complete.
To signal the end of charge, power to the tool will
drop quickly, allowing you just enough power to
finish making a cut, drilling a hole, or driving a
fastener. Charge the battery pack as needed.
How to Charge the Battery Pack
Align the battery pack with the bay and slide the
battery pack into the charger as far as possible.
The red light will come on, either flashing quickly
(battery pack is too hot or cold), flashing slowly
(battery pack is waiting for another pack to finish
charging) or continuous (pack is charging).
• A fully discharged battery pack with an internal
temperature in the normal range will charge in 30
to 75 minutes, depending on the battery pack.
• Heavily cycled batteries may take longer to charge
completely.
Maintenance and Storage
Store your charger in a cool, dry place.
As a general practice, it is best to unplug battery
chargers and remove batteries when not in use.
No battery pack damage will occur, however, if the
charger and battery pack are left plugged in.
WARNING To reduce the risk of injury,
always unplug the charger and re-
move the battery from the charger before per-
forming any maintenance. Never disassemble
the battery or charger. Contact your
MILWAUKEE
dealer for ALL repairs.
To reduce the risk of injury and damage, never
immerse your battery or charger in liquid or
allow a liquid to flow inside them.
Cleaning
Clean out dust and debris from charger vents and
electrical contacts by blowing with compressed air.
Use only mild soap and a damp cloth to clean the
battery pack and charger, keeping away from all
electrical contacts. Certain cleaning agents and
solvents are harmful to plastics and other insulated
parts. Some of these include gasoline, turpentine,
lacquer thinner, paint thinner, chlorinated cleaning
solvents, ammonia and household detergents
containing ammonia. Never use flammable or
combustible solvents around batteries, charger,
or tools.
• The Fuel Gauge lights on 18V battery packs are
displayed as the pack is being charged, indicating
how fully charged the pack is.The fuel gauge will
turn off when charging is complete.
• After charging is complete, the continuous green
light will come on.
• The charger will keep the battery pack fully
charged if it is left on the charger.
• The second pack inserted in the charger will be-
gin charging when the first pack inserted is fully
charged.
Repairs
• If the light indicator flashes red and green, check
that the battery pack is fully seated into the bay.
Remove the battery pack and re-insert. If the light
continues to flash red and green, the battery pack
may be extremely hot or cold, or wet. Allow the
battery pack to cool down, warm up, or dry out
and then re-insert. If the problem persists, contact
your MILWAUKEE dealer.
The charger has no serviceable parts.
• If the light indicator does not come on, check
that the battery pack is fully seated into the bay.
Remove the battery pack and re-insert. If the
light indicator still does not come on, contact
your MILWAUKEE dealer.
5
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Milwaukee Electric Tool Corporation (Australia)
Techtronic Industries (Australia) Pty. Ltd.
Doncaster, Victoria, Australia, 3108
Milwaukee Electric Tool Corporation (New Zealand)
Techtronic Industries (New Zealand) Pty. Ltd.
Penrose, Auckland, New Zealand, 1060
Designed by Milwaukee Electric Tool Corporation
Professionally made in China for Milwaukee Electric Tool Corporation
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