Princeton Tec cares about the environment and
recommends recycling batteries. For more information
about battery recycling, please go to:
Observe proper battery polarity when installing the
batteries. Improper installation of the batteries will
damage the light and void the warranty.
• Never mix fresh and used batteries.
• Never mix different battery brands or chemistry types.
• Always remove drained batteries immediately.
• Remove batteries during long periods of storage.
NOTE: Lithium batteries offer extended constant
brightness time, extreme cold weather performance,
and lighter weight. Rechargeable NiCad or NiMH
batteries may result in reduced brightness due to lower
The Quad battery compartment has a waterproof seal.
It is important to keep this seal free from dirt and away
from harsh chemicals in order to preserve waterproof
integrity. Inspect the seal every time batteries are
changed. If dirt is present, wipe gently. With a damp
cotton swab and mild soap until dirt is removed.
NOTE: Some battery types can emit hydrogen gas,
which can create an explosion potential in sealed
devices if it is not vented or removed. The Quad is
equipped with a platinum catalyst to remove this gas.
Upon severe impact, the catalyst could fracture. If you
notice a rattling sound in the headlamp or gray particles
in the battery compartment, do not use the headlamp.
See the warranty and return policy for more information.
If the Quad fails to light:
• Check the batteries for proper installation.
• Replace batteries if proper installation is confirmed.
• Check circuit board for water (the seal may have
been compromised by improper rear cover installation).
The light will resume normal operation once the water
is shaken or blown out and the light is left open until
completely dry. If the light has been contaminated with
Modes (High, medium, low and flash) are selected by
pressing and releasing the button within 1.5 seconds of
the previous button press.
There are two ways to turn the Quad off. You can cycle
through the modes until you reach off or if more than two
seconds has passed since the previous button press,
holding the button for 1.5 seconds will turn the light off.
Due to International regulations, Princeton Tec's lifetime
warranty can only be offered to customers in the USA.
Princeton Tec offers a 10-year warranty to our
customers outside the USA. FULL WARRANTY -
Princeton Tec warrants this product to be free from
defects in workmanship and materials under normal
use for as long as you own this product. This warranty
covers all of the component parts of the product
except batteries. This warranty does not cover
deterioration due to normal wear or damage due to
misuse, alteration, negligence, accidents, or
unauthorized repair. Princeton Tec will repair or replace
parts which are defective In workmanship or materials.
Your authorized Princeton Tec Dealer and Princeton Tec
are the only facilities authorized to repair the product.
After (3) unsuccessful attempts to repair the product,
you have the right to elect replacement of the product
or a refund of the purchase price less allowance for use
of the product. NO INCIDENTAL OR CONSEQUENTIAL
DAMAGES ARE INCLUDED IN THIS WARRANTY.
(Some states do not allow the exclusion or limitation of
incidental or consequential
damages, so the above limitations or exclusions may
not apply to you.) This warranty gives you specific legal
rights, and you may also have other rights which vary
from state to state.
Princeton Tec reserves the right to change product
specifications without notice.
Circuitry and Power Consumption / Regulated Leds
USA Lifetime Warranty - International 10-Year Warranty
See Regulated LED diagram
The Quad uses a sophisticated current-regulating
circuitthat maintains initial brightness as long as the
batteries Have sufficient voltage.
salt water, flush the unit with fresh water and dry as
Battery Power Meter
The purpose of the red low battery power meter LED
is to indicate when the batteries are near the end of
their functional life.
If the headlamp is turned off and the battery voltage is
low, the red low battery power meter LED will become
active and start blinking.
If the headlamp is turned on and the battery voltage is
low, the light beam will blink several times in rapid
succession. This signal indicates the batteries are
running Iowan power.
NOTE: The red low battery power meter LED only
functions when the headlamp is turned off and will not
blink while the headlamp is turned on.