WARNING
product damage due to a short circuit, never
immerse your charger or battery pack in fluid
or allow a fluid to flow inside them. Corrosive
or conductive fluids, such as seawater, certain
industrial chemicals, and bleach or bleach-
containing products, etc. can cause a short circuit.
POWER INDICATOR
This lithium-ion battery pack is equipped with
power indicators on both sides of the battery
pack that display the battery charge level.
Press the power-indicator button on the front
of battery pack to display the four LEDs in the
power indicator. The LEDs will remain lit for
Press the power-indicator button and the LEDs will light up to communicate the battery pack
charge level:
Battery Pack Charge Level
100% – 75%
75% – 50%
50% – 25%
25% – 10%
< 10%
SELF-INSPECTION (MODEL FX0311 ONLY)
The battery pack FX0311 features self-
inspection function. Press and hold the power-
indicator button on the battery pack for 5
seconds to perform a self-inspection.
The four LEDs of the power indicator will turn on
and off fast in sequence to warn of the battery
pack faults.
After 10 seconds, you can press the power-
OVER-VOLTAGE WARNING
If the battery pack is charged at a voltage above
this threshold level, all four LEDs will rapidly
OPERATING INSTRUCTIONS
To reduce the risk of fire,
personal injury, and
WARNING
accessories not recommended for use with
this battery pack. Any such alteration or
modification is misuse and could result in a
hazardous condition leading to possibly serious
personal injury.
approximately 10 seconds. It is recommended
that the battery pack be recharged to full charge
before starting a big job or using it for long
periods of time.
The power indicator can be used regardless
whether the battery is attached or removed
from tool.
Power Indicator
indicator button again. If the fault is fixed, the
power indicator will display the battery charge
level.
If the fault isn't fixed, replace the battery
pack and contact FLEX customer service for
assistance.
NOTE: The fault display lasts for 10 seconds
and you need to wait for 10 seconds before
performing another self-inspection.
flash green for approximately 10 seconds.
Remove the battery pack from the charger or
power tool.
-9-
Do not attempt to modify
the battery pack or create
Light Pattern
Solid for 10 sec.
Solid for 10 sec.
Solid for 10 sec.
Solid for 10 sec.
Flashing for 10 sec.