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Princeton Tec APEX PRO User Manual

English

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Battery

Type

Maxbright

4 Ultrabright

LEDs

Low

High

Power Level

Output Distance

(m)

Regulated/Constant

Burn Time (Hours)

Overall Burn Time

(Hours)

Lithium

CR123

Battery Installation
See battery installation diagram

2 CR123
Observe proper battery polarity when installing

the batteries.
WARNING

• Never mix fresh and used batteries.

• Never mix different battery brands

• Always remove drained batteries immediately.

• Remove batteries during long periods of storage.

Princeton Tec cares about the environment and

recommends recycling batteries. For more

information about battery recycling, please go to:

www.batteryrecycling.com
Improper installation of the batteries will damage the

light and void the warranty.
The battery pack has a waterproof seal. It is important

to keep this seal free from dirt and 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.

Battery Power Meter
Multicolored LED

*Capacity percentage is the minimum expected

remaining power needed to operate the Maxbright

LED in high mode at 0° C.
The purpose of the battery power meter is to give you

a general idea of the remaining burn time. Switching

modes can create an abrupt change in battery voltage

which may cause the indicator to change color. Once

the color turns yellow, the burn time remaining

depends on the typical discharge curve for the type of

batteries you are using. After the light has been turned

off, the battery voltage might temporarily increase,

causing the battery power meter to temporarily display

an artificially higher setting.
When the light is off, the battery power meter will

continue to blink for 24 hours to indicate the current

status of the batteries. After 24 hours with no activity,

the battery power meter will turn off to conserve

battery power. When the light is turned on again, it

will resume functioning.

Low Battery Signaling During Use
In addition to displaying red on the battery power

meter, when there are approximately 20 minutes of

run time remaining, the Apex Pro will blink three

times in rapid succession.
You can then decide to stay at your current light level

or switch to a lower light level, which may cause

battery voltage to rise enough that the battery power

meter transitions back to yellow. When the battery

power meter returns to red, the light will blink again to

alert you.

Circuitry
The Apex Pro uses a sophisticated circuit to control

www.princetontec.com

Operating Instructions

Notice d’utilisation et

d’entretien

Bedienungsanleitung

1

2

4

OFF = press & hold

(1-2 seconds)

press 1x = High
press 2x = Low

press 1x = High
press 2x = Low
press 3x = Flash

4

Ultrabright

LEDs

1

Maxbright

LED

1

Maxbright

LED

Spotlight

4

Ultrabright

LEDs

Green

> 40 % of total

Yellow

≤ 40 % of total

Red

~ 20 minutes of run time remaining

Color

Battery Capacity*

ENGLISH

120

67
43
26

15
20
12
35

1.5

7

5.5

12

* The times listed in this table assume you start with fresh batteries and use only one power level.
* Les durées mentionnées dans le présent tableau sont calculées sur la base de l’utilisation de piles neuves et d’un seul

mode d’éclairage.
* Bei den in der folgenden Tabelle aufgeführten Zeiten wird vorausgesetzt, dass Sie neue Batterien und lediglich eine

Leuchtstärke verwenden.

Operation / Fonctionnement / Betrieb

Battery Installation / Mise en place des piles / Einlegen der Batterien

Burn time is the total time that the headlamp produces a minimum of 0.25 lux at 2

meters. 0.25 lux is about the equivalent of a full moon on a clear night. Regulated burn

time is less than overall burn time.

DISTANCE (Meters)

26

43

120

67

Regulated

1.5H

Total

15H

HIGH

Regulated

7H

Total

20H

LOW

DISTANCE (Meters)

43

26

120

67

APEX

®

PRO

LED HEADLAMP

LED STIRNLAMPE

LAMPE FRONTALE LED

the light. Under normal circumstances, the metal

heatsink will sufficiently cool the electronics and

protect the LEDs from damage. Should the internal

temperature of the light get too hot, a backup

temperature protection circuit will activate and

gradually decrease the light output until the

temperature is within the specified limits.
The Apex Pro will automatically turn off after 12 hours

of inactivity. Any button press during the 12 hour

period will reset the auto-off timer.
Never attempt to disassemble the lamp housing. It is

sealed to protect the components from water and

there are no user-serviceable parts inside.

Disassembly will void your warranty!
To keep the heatsink at peak performance, keep the

heatsink and plastic cover free of obstructions (mud

and dirt). Do not remove the heatsink cover—it is

there to protect you from the high temperature of the

heatsink during operation. If the heatsink cover is

damaged or broken under normal use, do not use the

headlamp. See the warranty and return policy for

more information.

Power Consumption
The Apex Pro uses a current-controlled circuit that

maintains constant light output as long as the batteries

have sufficient voltage. Constant burn time is dependant

on the battery type, LEDs, and light level selected.
The Ultrabright LEDs provide the maximum level

of wide-angle flood light for task work and the

Maxbright will provide a tightly focused spotlight for

distance illumination.

Trouble Shooting
If the Apex Pro fails to light:

• Check the batteries for proper installation.
• Inspect the cable for damage.

If the Apex Pro does not seem to change

brightness levels:

• The battery voltage may be too low to switch to

a brighter setting. This condition is normal for a

regulated LED/current-controlled circuit. You are

most likely to experience this issue in the

Maxbright LED mode. Install new batteries and

recheck the modes.
• In extreme heat conditions the internal temperature

of the light may be too hot and the LED

temperature protection circuit may have activated.

Allow the light to cool and try again.

Lifetime Warranty
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.

Return Policy
If your light fails to operate, follow these simple steps:
1) Check batteries. Replace if necessary.
2) Contact Princeton Tec customer service at

800-257-9080 to request an RMA# in order to send

your light for repair or replacement. No warranties will

be accepted without an RMA#.
3) If the light continues to function improperly, return it

without batteries to:

Princeton Tec, 5198 Rt. 130

Bordentown, NJ 08505. Postage due and freight

collect items will not be accepted

Princeton Tec

PO Box 8057, Trenton, NJ 08650

Phone: 609-298-9331

Fax: 609-298-9601

www.princetontec.com

© 2013 Princeton Tec

Wide Beam

3

Regulated

5.5H

Total

12H

HIGH

Regulated

12H

Total

35H

LOW

Total

36H

FLASH