
PRODUCT SAFETY
WARNING: Read all safety warnings and
all instructions. Failure to follow the
warnings and instructions may result in
electric shock, fire and/or serious injury.
Save all warnings and instructions for future
reference.
WARNING: This product can expose you
to chemicals including lead, phthalate
or bisphenol A which are known to the
State of California to cause cancer, birth
defects or other reproductive harm. Wash your
hands after use. For more information go to
www.P65Warnings.ca.gov.
IMPORTANT SAFETY INSTRUCTIONS
WARNING: When using this product basic
precautions should always be followed,
including the following:
1. Read all the instructions before using the
product.
2. To reduce the risk of injury, close supervision
is necessary when a product is used near
children.
3. Know how to stop the product and bleed
pressures quickly. Be thoroughly familiar with
the controls.
4. Stay alert – watch what you are doing.
5. Do not operate the product when fatigued or
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under the influence of alcohol or drugs.
6. Keep operating area clear of all persons
7. Do not overreach or stand on unstable support.
Keep good footing and balance at all times.
8. Follow the maintenance instructions specified
in the manual.
9. WARNING – Risk of injection or
injury– do not direct discharge stream at
persons.
10. Do not spray electrical apparatus and wiring.
SAVE THESE INSTRUCTIONS
SAFETY WARNINGS FOR
BATTERY PACK
a) Do not dismantle, open or shred battery
pack.
b) Do not expose battery pack to heat or
fire. Avoid storage in direct sunlight.
c) Do not short-circuit a battery pack. Do not
store battery packs haphazardly in a box
or drawer where they may short-circuit
each other or be short-circuited by other
metal objects. When battery pack is not in
use, keep it away from other metal objects, like
paper clips, coins, keys, nails, screws or other
small metal objects, that can make a connection
from one terminal to another. Shorting the
battery terminals together may cause burns or
fire.
d) Do not remove battery pack from its
original packaging until required for use.
e) Do not subject battery pack to mechanical
shock.
f) In the event of battery leaking, do not
allow the liquid to come in contact
with the skin or eyes. If contact has
been made, wash the affected area with
copious amounts of water and seek
medical advice.
g) Observe the plus (+) and minus (–) marks
on the battery back and equipment and
ensure correct use.
h) Do not use any battery pack which is not
designed for use with the equipment.
i) Keep battery pack out of the reach of
children.
j) Seek medical advice immediately if a cell
or battery has been swallowed.
k) Always purchase the battery pack
recommended by the device manufacturer
for the equipment.
l) Keep battery pack clean and dry.
m) Wipe the battery pack terminals with a
clean dry cloth if they become dirty.
n) Battery pack need to be charged before
use. Always use the correct charger and
refer to the manufacturer’s instructions
or equipment manual for proper charging
instructions.
o) Do not leave battery pack on prolonged
charge when not in use.
p) After extended periods of storage, it may
be necessary to charge and discharge
the battery pack several times to obtain
maximum performance.
q) Battery pack gives its best performance
when it is operated at normal room
temperature (20 °C ± 5 °C).
r) When disposing of battery packs, keep
battery packs of different electrochemical
systems separate from each other.
s) Recharge only with the charger specified
by WORX Do not use any charger other
than that specifically provided for use
with the equipment. A charger that is
suitable for one type of battery pack may create
a risk of fire when used with another battery
pack.
t) Retain the original product literature for
future reference.
u) Use only the battery pack in the
application for which it was intended.
v) Remove the battery pack from the
equipment when not in use.
w) Dispose of properly.
Cordless Portable Power Cleaner EN

SYMBOLS
To reduce the risk of injury, user
must read instruction manual
Warning
Li-Ion battery, battery must be
recycled
Remove battery from the socket
before carrying out any adjustment,
servicing or maintenance.
Do not burn
Do not expose to rain or water
POSITEC Inc. has established
a partnership with the RBRC
Corporation to recycle any Positec
batteries with the RBRC-call2recycle
seal. For environmental protection,
please do not discard batteries in
the trash. After the batteries’ life
cycle is ended, then please call
1-800-822-8837 for a free service
that will properly dispose of the
battery.
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Cordless Portable Power Cleaner EN

1. PRESSURE SETTING SWITCH
2. LOCK-OFF SWITCH
3. ON/OFF SWITCH LEVER
4. BATTERY PACK *
5. HOSE ADAPTER
6. POWER NOZZLE
7. PRESSURE CLEANING LANCE
8. NOZZLE ADAPTER
9. DRAIN HOLE OF THE AIR RELEASE VALVE
10. MULTI-SPRAY NOZZLE
11. FIXING NAIL
12. BATTER POWER INDICATOR
13. HOSE CONNECTOR
14. HOSE FILTER
15. FLOATER
16. DRAW HOSE
17. HOSE CLIP
18. CARRY BAG*
19. QUICK CONNECT ADAPTER
20. SOAP BOTTLE*
21. BRUSH*
22. WINDOW SQUEEGEE WITH WATER SPRAYER *
23. TURBO NOZZLE*
24. BOTTLE CAP CONNECTOR*
25. FILTER SCREEN (SEE FIG. R2)
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Cordless Portable Power Cleaner EN

TECHNICAL DATA
WG644
Charger voltage 120V~60Hz /
Voltage 40V Max. (2x20V Max.)**
High / Low (based on garden hose connected)
Rated pressure max. 450psi / 290psi
Max. water flow rate 0.9gpm
Max. inlet water pressure 87psi (0.6MPa)
Water suction height max. 5ft.
Water temperature max. 104o Fahrenheit
Battery type Lithium-ion /
Battery model WA3575 (2.0Ah) /
Charger model WA3875 /
Charger rating
Charging time (approx.)
Battery pack
2.0Ah (1pc)
2.0Ah (2pcs)
Weight (with lance) 6.9lbs 5.1lbs
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** Voltage measured without workload. Initial battery voltage reaches maximum of 20 volts. Nominal voltage is 18 volts.
Input: 120V~60Hz, 100W
Output: 20V , 2.0A
60mins
120mins
WG644.9
/
/
ACCESSORIES
WG644 WG644.9
Draw hose 20ft. (6m) 1 1
Multi-spray nozzle 1 1
Pressure cleaning lance 1 1
Carry bag / /
Window squeegee with water sprayer (WA4050) /
Brush (WA4048) / /
Soap bottle (WA4036) / /
Battery pack (WA3575)* 2 /
Charger (WA3875) 1 /
Quick connect adapter (WA4017) 1 1
Bottle cap connector (WA4038) / /
Turbo nozzle (WA4037) / /
Extension lance (WA4012) / /
/
* Use only the following type and size batteries: WA3575, WA3578 (sold separately), WA3671 (sold separately).
Only use the appropriate accessories intended for this tool. Accessory information can be found on the product
packaging, at a WORX dealer or on our website at www.worx.com.
Cordless Portable Power Cleaner EN