6
Arming the Machine
MX FUEL™ machines must be armed prior to use.
Even with the battery pack inserted, functions will
not operate until the machine is armed.
To arm the machine:
1. Insert the battery pack.
2. Press the Arm button. The MX FUEL™ icon will
light and the LEDs are now operational.
NOTE
: The internal fan will operate whenever the
machine is in use.
3. After 60 minutes of inactivity (no current being
drawn), the machine will enter sleep mode. The
MX FUEL™ icon will go off and the LEDs are
nonoperational.
4. Press the Arm button to reactivate the machine.
5. Press and hold the ARM button for 2 seconds to
unarm (turn off) the machine. The MX FUEL™
icon will go off.
NOTE
: The internal fan will continue to operate for
a short time after the machine has been turned off.
Onboard Fuel Gauge LEDs
and Alert Tones
Onboard Fuel Gauge LEDs display real-time battery
levels for their respective MX battery. When the ma
-
chine detects a low battery condition, a dead battery,
an overload, or overtemp condition, the user will be
alerted with an audible tone(s). Investigate the root
cause of the tone(s) to continue use.
Overload and Overtemperature
Conditions
When an overload or overtemperature condition
occurs, the machine will produce a unique tone and
the respective icon will light. Take the appropriate
action, such as turning off or reducing the load on
the machine, or allowing the machine to rest (cool
down) before continuing use.
ONE-KEY™
To learn more about the ONE-KEY™ functionality for
this tool, please refer to the quick reference included with
this product or go to milwaukeetool.com/One-Key. To
download the ONE-KEY™ app, visit the App Store or
Google Play from your smart device.
ONE-KEY™ Indicator
Solid Blue
Wireless mode is active and ready
to be configured via the ONE-KEY™
app.
Blinking Blue Tool is actively communicating with
the ONE-KEY™ app.
Blinking Red
Tool is in security lockout and can
be unlocked by the owner via the
ONE-KEY™ app.
CHARGER
OPERATION
WARNING
Charge only MILWAUKEE MX™
Lithium-Ion batteries in this
MILWAUKEE Lithium-Ion charger. Other types of
batteries may cause personal injury and damage.
When to Charge the Battery Pack
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.
• Use the Fuel Gauge to determine when to charge
your MILWAUKEE Lithium-Ion battery pack.
• 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. 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 or charger is too hot or cold), flashing
slowly (communication between pack and charger)
or continuous (pack is charging).
• When a battery pack is inserted into the charger,
the LEDs will indicate the following:
Continuous red: Charging
Continuous green light: Charging is complete
Flashing red: Battery is too hot/cold
Charging will begin when battery reaches
correct charging temperature
Flashing red/green: Damaged or faulty battery
pack
•The next battery pack inserted in the charger will be-
gin charging when the previous pack is fully charged.
•A fully discharged battery pack with an internal tem-
perature in the normal range will charge in about 45
to 90 minutes, depending on the battery pack and
internal temperature of the charger.
•Heavily cycled batteries may take longer to charge
completely.
•The fuel gauge lights 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 light indicator will be
same as normal charging.
