StreamLight Knucklehead User manual

KnucKlehead
Operating Instructions
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431

ENGLISH
OPERATING INSTRUCTIONS FOR
STREAMLIGHT KNUCKLEHEAD
Thank you for selecting the Knucklehead, a truly remark-
able portable light. As with any professional tool, reason-
able care and maintenance of this product will provide
years of dependable service.
Please read this manual before using your Knucklehead. It
includes important safety and operating instructions and
should be saved.
The Knucklehead must be charged before first use if a
rechargeable battery pack is used.
SAFETY
CAUTION: LED RADIATION (RG-2) – DO NOT
STARE INTO BEAM. May Be Harmful To Eyes.
A. SAVE THESE INSTRUCTIONS. This guide contains
important safety and operating instructions for your
Knucklehead and charger (if applicable).
B. Before using a battery charger, read all instructions
and cautionary markings on the charger.
C. Don’t abuse the cord. Never carry a charger by the
cord or use the cord to disconnect the charger from a
receptacle.
D. Plug AC chargers directly into an electrical outlet. Do
not use an extension cord.
E. Do not operate any damaged charger. Replace dam-
aged cords or plugs immediately.

F. Do not put any metal objects on to the charging termi-
nals located in the charger holder. Although there is
no electrical shock hazard, this action could cause a
burn injury.
G. Remove the Knucklehead from the charger holder be-
fore attempting any routine cleaning or maintenance.
H. See the product markings for the specific battery re-
quired for your light. Do not open battery, dispose of in
fire, or short circuit – may ignite, explode, leak or get
hot causing personal injury.
I. Do not short the battery pack as it may create a fire
hazard. For transport or storage, place protective cap
or tape over recessed battery contacts.
J. A small leakage of liquid from the battery cells can oc-
cur under extreme usage or temperature conditions.
This does not necessarily indicate a failure. However,
if the outer case seal is broken and the chemical leak-
age gets on your skin:
1) Any liquid chemical must be flushed off the skin
with a generous amount of water. Brush any dry
or powdered chemicals thoroughly, before flushing
the area with profuse amounts of water.
2) If battery liquid gets into the eyes, flush them with
clear water for a minimum of thirty (30) minutes
and seek immediate medical attention. (Medical
note: The liquid is a 25 -35% solution of potassium
hydroxide.)
K. Do not charge the Knucklehead in potentially hazard-
ous locations.
L. Do not attempt to repair or replace any components in
potentially hazardous locations.
USING THE LIGHT
• The pushbutton switch is located on the body of the
light.
• Depress the button momentarily to turn the
light on or off.

• From the “on” mode depress and hold the button for
one second to dim, two seconds to activate the strobe
mode, and eight seconds to enter the moonlight mode
with extended runtime. An additional press of the
switch from any of these modes will turn the light off.
• The head of the Knucklehead can turn 360º on the
body and will pivot 210º from side to side.
• Use the magnet on any convenient ferrous surface to
provide task-specific illumination.
NOTE: The magnet should be attached carefully to sur-
faces as it is very powerful.
• Lift and slide out the integrated hook to hang the
Knucklehead.
ATTACHING THE MAGNET
The Knucklehead ships with the magnet detached from
the light. The attachment screw is located under the label
of the silver shipping washer. Slide off the silver shipping
washer and buffer ring and discard both parts. Place the
magnet onto the back of the Knucklehead ensuring the
post on the back of the light engages with the blind hole
in the back of the magnet. Secure the magnet by install-
ing and tightening the attachment screw with a 9/64 hex
head wrench.
CHARGING THE LIGHT (If Applicable)
The Knucklehead should be fully charged before use. In-
sert the base of the flashlight into the charger (door latch
faces out). Several charge and discharge cycles may be
needed to achieve full battery capacity. The Knucklehead
is designed to be charged continuously between uses.
Charger Description
There are two basic charger options, FAST CHARGERS
[one (1) hour recharge] and the STEADY CHARGER [ten
(10) hour recharge]. FAST CHARGERS have either a DC
cord or an AC transformer wired directly into a strain re-
lief on the charger housing. The STEADY CHARGER has
interchangeable AC and DC power cords which allow con-
nection to a variety of AC and DC power sources.

Fast Charger
When the Knucklehead is placed into the charger the red
LED lights and the battery is fast-charging. When the bat-
tery is fully charged (appx.1 hour or less) the green LED
will light and the charger switches to a trickle (mainte-
nance) charge.
Optimal battery life can be achieved if the battery is fast
charged in moderate temperatures. Fast charging at low
temperature may cause the battery to lose some capacity.
The DC FAST CHARGER is equipped with a temperature
sensing system that automatically adjusts the current for
low temperature charging. This system works best when
the charger and the light are close to the same tempera-
ture. Avoid taking a Knucklehead from a cold environment
such as 40°F or lower and placing it into a warm charger.
Allow the Knucklehead to warm up for about a half hour
before placing it in the charger. If the light and charger are
colder than 40°F, the charge indicators will not light until
the system warms.
Steady Charger
The red LED indicates that the battery is being charged
at a steady rate. Charging will continue as long as power
is applied to the charger. The light may be continuously
charged in the steady charger at any temperature above
0°F.
WARNING: Use only genuine Streamlight
®
charger-
holders and cords. DO NOT remove the wall transformer
from an AC FAST CHARGER and connect it to a DC power
source; the charger will be destroyed.
MOUNTING THE CHARGER (VEHICLES)
The chargers are designed to be used in many positions.
Decide on a convenient location and make sure there is
enough clearance to insert and remove the flashlight.
Use the charger base as a template, mark the location
of the mounting holes and mount the charger securely
with appropriate hardware. Connect the charger to an ap-
propriate power source. The housing of all Knucklehead
chargers is electrically isolated and may be mounted to
the vehicle chassis.

IMPORTANT: Before making electrical connections in a
vehicle, keep in mind that a shorted auto battery can eas-
ily start a fire. Make all connections with type-approved
connectors intended for such service.
DC Fast Charger
For maximum flashlight battery life, connect the DC fast
charger directly to the 12V vehicle battery or the un-
switched side of the ignition switch. This will minimize
unnecessary charge cycles which would be initiated each
time the ignition switch is turned on. DC FAST CHARGERS
charge the battery quickly but draw a minimum of cur-
rent after charge. The DC #1 charger features a cigarette
lighter plug. The DC #2 charger (direct wire) is used to
permanently mount a Knucklehead in a vehicle. Connect
the wires to the vehicle battery or to the unswitched side
of the ignition switch through a 5-amp fuse; slow-blow
is best. Multiple DC #2 installations should be connected
as above but using a separate fuse for each light. The DC
FAST CHARGER systems do not draw any current when
the light is not inserted in the charger.
DC Steady Charger
This charger is available with two (2) plug-in power cords:
a cigarette lighter plug or direct wire. The charger can
be connected directly to the vehicle battery or in the un-
switched side of the ignition switch if the vehicle is oper-
ated every few days. If the vehicle does not operate for
periods of longer than a few days or multiple installations
are planned, the charger(s) should be connected to the
switched side of the ignition or master power switch; the
vehicle battery could also be connected to a supplemental
charging system.
Each charger should be connected through a 1-amp fuse;
slow-blow is best. Multiple installations should use a
separate fuse for each charger. Each STEADY CHARGER
with a light inserted continuously draws about .2 amperes
while one without a light inserted draws no current.
Vehicle Polarization
The chassis on most vehicles is negative ground. In this
case, the charger’s striped lead should be connected to

the output side of the fuse. The unmarked negative lead
should be connected to the chassis. If the chassis of the
vehicle is positive ground, the striped lead of the char-
ger should connect to the chassis and the unmarked lead
should go to the output side of the fuse.
BATTERY PACK REPLACEMENT
When replacing the battery pack; note the orientation.
The pack is keyed; the base will only close if the battery
pack is inserted properly. Do not force the base closed.
Alkaline
Remove the alkaline battery pack. Depress the tabs on the
outside edge of the alkaline battery pack and pull the two
halves apart. Use fresh replacement cells and observe the
polarity indicated in the tray. Snap the pack closed and
reinsert. It is keyed; the base will only close if the battery
pack is inserted with the proper orientation. Do not force
the base closed.
NOTE: Do not mix old and new batteries, types or brands.
NOTE: The rechargeable battery contained in this prod-
uct is recyclable. At the end of its useful life, under various
country and state laws, it may be illegal to dispose of this
battery in the municipal solid waste stream. Check with
your local solid waste officials for details in your area for
recycling options or proper disposal (In USA: ABRC).
PRODUCT REGISTRATION: To register your product, go
to www.streamlight.com (Online Product Registration).
Retain your receipt or any proof of purchase.
PRODUCT USE: Streamlight flashlights are intended for
use as high intensity, heavy duty, portable light sources.
Use of Streamlight flashlights for any purpose other than
as light sources is specifically discouraged by the manu-
facturer.
WARNING: Be sure to use only genuine Streamlight
®
replacement parts.
Important: To assure product safety and reliability, repairs
other than those listed below should be performed at the
Streamlight factory. Always use Streamlight approved

©2010 997637 Rev A 12/10
LIMITED LIFETIME WARRANTY
Streamlight warrants this product to be free of defect,
including the LED, for a lifetime of use. We will repair,
replace or refund the purchase price, at our option, of any
Streamlight product that does not work as a result of a
manufacturing defect for as long as you own it. This lim-
ited lifetime warranty excludes abuse, batteries, chargers,
switches, electronics and normal wear and tear. Recharge-
able batteries, chargers, switches and electronics have a
two (2) year warranty with proof of purchase.
Serial # ____________________________________
Date of Purchase_________________
replacement parts, substitution may invalidate under-
writer’s approval
SERVICE
The Knucklehead has user-serviceable parts including
battery, lens, hook and magnet cover.