6
ONE-KEY™ Indicator
Solid Blue
Blinking Blue
Blinking Red
Wireless mode is active and ready
app.
Tool is actively communicating with
the ONE-KEY™ app.
ONE-KEY™
Tool is in security lockout and can
be unlocked by the owner via the
ONE-KEY™ app.
LIGHT OPERATION
WARNING
To reduce the risk of injury
look directly into the light when
, do not
the light is on.
Using the Light
will light.
1. Insert battery pack(s) or plug into AC power.
2. Press the Arm
button.
NOTE:
When the light is running on battery, the
Battery Power Indicator
will light. When the
light is running on AC power, the AC Power Indicator
10-32%
3. Press the
-
and
+
buttons to cycle through
High
,
Medium
, and
Low
.
4. Press the Arm
32-55%
55-77%
77-100%
BATTERY OPERATION
Fuel Gauge
Fuel Gauge Button
Approximate Run Time Remaining
Fuel Gauge Lights
Diagnosis
Solution
Lights 1 - 4 Solid
Remaining run time Continue working
slowly
time left
Less than 10% run Prepare to charge pack
quickly
End of discharge
Charge pack
quickly
Current draw too
high
Lights 1&3 / 2&4,
Battery temperature
too high
Release trigger. Once
fuel gauge has stopped
reduce pressure
Release trigger and
allow battery to cool
Lights 1&4 / 2&3,
Communication
error
Remove the battery.
Press the Fuel Gauge
button to clear. Reinsert
the battery.
†
to a
MILWAUKEE
®
service facility.
†
If the problem persists, take the product, charger, and battery pack
CHARGER OPERATION
WARNING
Use the Fuel Gauge to determine the battery pack's
remaining run time. Press the Fuel Gauge button to
display the lights. The Fuel Gauge will light up for
2-3 seconds. When less than 10% of charge is left,
battery reaches 0% charge, 1 light on the fuel gauge
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 "re-
cover" some of their charge after resting.
Under extreme circumstances, the internal tem-
perature of the battery could become too high. If
alternating pattern and the product will not run. Allow
the battery to cool down.
When to Charge the Battery Pack
with this
MILWAUKEE
®
Charger
• Use the Fuel Gauge to determine when to charge
your
MILWAUKEE
®
Li-Ion battery pack.
starting a big job or long day of use.
•
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.
slowly (communication between pack and charger)
or continuous (pack is charging).
• 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 be-
ing charged, indicating how fully charged the pack is.
• 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.
To learn more about the ONE-KEY™ functionality
for this tool, please refer to the quick reference
included with this product or go to
onekey.milwaukeetools.com.au. To download the
ONE-KEY™ app, visit the App Store or Google Play
from your smart device.
An alternating blinking pattern indicates that an
error or overtemperature state was encountered.
Allow the battery pack to cool and reinsert. If the
pattern continues, contact a
MILWAUKEE
®
service
facility. If the Fuel Gauge doesn't appear to be
working, place the battery pack on the charger and
charge as needed.
The only time it is necessary to charge the
MILWAUKEE
®
Li-Ion battery pack is when the
battery pack has reached the end of its charge. To
signal the end of charge, power to the product will
drop quickly, allowing you just enough power to
finish the operation. Charge the battery pack as
needed.
Charge only
MILWAUKEE
®
MX
FUEL™ Li-Ion batteries in this
MILWAUKEE
®
Li-Ion charger. Other types of
batteries may cause personal injury and
damage.
Remove the battery pack from the product 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.
• If the light indicator flashes red and green, check
that the battery pack is fully seated into the bay.
Remove the battery pack and reinsert. If the light
continues to flash red and green, remove pack(s)
and unplug charger for at least 2 minutes. After 2
minutes, plug charger back in and insert pack. If
the problem persists, contact a
MILWAUKEE
®
service facility.
