Princeton Tec QUAD User Manual
Princeton Tec Lighting

Princeton Tec cares about the environment and
recommends recycling batteries. For more information
about battery recycling, please go to:
www.batteryrecycling.com
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 
nominal voltage. 
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 
described above.
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.
99H
105H
110H
97H
19
30
50
18
29
49
49
18
29
49
49
97
99
105
110
45
24
10
60
31
10
1
5
38
16
4
48
