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This operator's manual contains important safety 
and operating instructions for MILWAUKEE M4™ 
Lithium-Ion batteries and the MILWAUKEE M4™ 
Lithium-Ion battery charger. Before using the batter-
ies and charger, read this operator's manual, your 
tool operator's manual, and all labels on the battery, 
charger and tool. 
1.

CAUTION

TO REDUCE THE RISK OF IN-
JURY, CHARGE MILWAUKEE  

M4™  LITHIUM-ION BATTERIES ONLY IN 
MILWAUKEE M4™ LITHIUM-ION CHARGERS. 

Other types of chargers may cause  personal 
injury or damage. Do not wire a battery to a 
power supply plug or car cigarette lighter. Batter-
ies will be permanently disabled or damaged.

2.

USE MILWAUKEE M4™ LITHIUM-ION BATTER-
IES ONLY ON MILWAUKEE M4™ LITHIUM-ION 
TOOLS. 

Use with other tools may result in a risk 

of fire, electric shock or personal injury. 

3.

AVOID DANGEROUS ENVIRONMENTS. 

Do not 

charge battery in rain, snow, damp or wet loca-
tions.

 

Do not use battery or charger in the pres-

ence of explosive atmospheres (gaseous fumes, 

dust or flammable materials) because sparks may

be generated when inserting or removing battery, 

possibly causing fire.

4.

CHARGE IN A WELL VENTILATED AREA.

 Do

not block charger vents. Keep them clear to allow 
proper ventilation. Do not allow smoking or open 

flames  near  a  charging  battery.  Vented  gases

may explode.

5.

MAINTAIN CHARGER CORD.

 When unplugging

charger, pull plug rather than cord to reduce the
risk of damage to the electrical plug and cord.
Never carry charger by its cord. Keep cord from
heat, oil and sharp edges. Make sure cord will
not be stepped on, tripped over or subjected to
damage or stress. Do not use charger with dam-
aged cord or plug. Have a damaged cord replaced 
immediately with identical replacement parts (see 

“Maintenance”).

6.

DO NOT USE AN EXTENSION CORD UNLESS 
IT IS ABSOLUTELY NECESSARY. 

Using the

wrong, damaged or improperly wired extension

cord could result in the risk of fire and electrical

shock. If an extension cord must be used, plug
the charger into a properly wired 16 gauge or
larger extension cord with pins that are the same 
number, size and shape as the pins on the char-
ger. Make sure that the extension cord is in good 
electrical condition.

7.

CHARGER IS RATED FOR 120 VOLT AC ONLY. 

Charger must be plugged into an appropriate
receptacle.

8.

USE ONLY RECOMMENDED ATTACHMENTS.

Use of an attachment not recommended or sold
by the battery charger or battery manufacturer

may result in a risk of fire, electric shock or per

-

sonal injury.

9.

UNPLUG CHARGER

 when not in use. Remove

battery from unplugged chargers.

10. 

TO REDUCE THE RISK OF ELECTRIC SHOCK

,

always unplug charger before cleaning or main-
tenance. Use a Ground Fault Circuit Interrupter

(GFCI) to reduce shock hazards.

11. 

DO NOT BURN OR INCINERATE BATTERIES. 

Batteries may explode, causing personal injury or 
damage. Toxic fumes and materials are created
when batteries are burned.

12. 

DO NOT CRUSH, DROP, OR DAMAGE

 bat-

teries. Do not use a battery or charger that has
received a sharp blow, been dropped, run over,
or damaged in any way (e.g., pierced with a nail, 

hit with a hammer, stepped on).

13. 

DO NOT DISASSEMBLE.

 Incorrect reassembly

may  result  in  the  risk  of  electric  shock,  fire  or

exposure to battery chemicals. If it is damaged,
take it to a MILWAUKEE service facility.

14. 

BATTERY CHEMICALS CAUSE SERIOUS
BURNS.

 Never allow contact with skin, eyes, or

mouth. If a damaged battery leaks battery chemi-
cals, use rubber or neoprene gloves to dispose of 

it. If skin is exposed to battery fluids, wash with

soap and water and rinse with vinegar. If eyes
are exposed to battery chemicals, immediately

flush with water for 20 minutes and seek medical

attention. Remove and dispose of contaminated
clothing.

15. 

DO NOT SHORT CIRCUIT.

 A battery pack will

short circuit if a metal object makes a connection 
between the positive and negative contacts on the
battery pack. Do not place a battery pack near
anything that may cause a short circuit, such as
coins, keys or nails in your pocket. Do not allow

fluids to flow into battery pack. Corrosive or con

-

ductive fluids, such as seawater, certain indus

-

trial chemicals, and bleach or bleach containing
products, etc., can cause a short circuit.  A short

circuited battery pack may cause fire, personal

injury, and product damage.

16. 

STORE YOUR BATTERY AND CHARGER

 in a

cool, dry place. Do not store battery where tem-

peratures may exceed 120°F (50°C) such as in

direct sunlight, a vehicle or metal building during
the summer. Charger will charge

 

the battery when 

the battery's internal temperature is between

14°F (-10°C) and 140°F (60°C). When the battery

temperature is outside that range, charging will
not occur.

READ AND SAVE 

ALL INSTRUCTIONS 

FOR FUTURE 

REFERENCE.

GENERAL SAFETY RULES

WARNING

READ AND UNDERSTAND ALL INSTRUCTIONS. 

Failure to follow all

instructions listed below, may result in electric shock, fire and/or serious personal injury.

SAVE THESE INSTRUCTIONS

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