NITECORE HC90 User Manual

®

The All-Round Flashlight Expert

Features

· Purpose-designed for hiking, climbing, camping and general outdoor recreation

· True variable output with a unique ‘infinitely variable’ sliding switch

· USB rechargeable / powered by 1 x 18650 lithium-ion battery

· Aluminum “unibody” construction is highly rugged and provides excellent cooling

performance.

· Utilizes a premium CREE XM-L2(T6) LED for up to 900 lumens of output

· High-efficiency circuit provides up to 200 hours of runtime on low

· Third generation sliding control switch (patented) permits rapid and accurate mode

switching / brightness adjustment with the use of one hand.

· Intelligent li-ion battery charging circuit (integrated micro-USB charging port)

· A custom catoptrics-based system produces an extremely wide 100°beam angle

· Unique light housing can be rotated wide range preventing illumination dead zones.

· Equipped with unique secondary RGB LEDs (red, green and blue)

· Integrated temperature sensor and intelligent temperature control ensure stable and

safe operation.

· High-efficiency regulation circuit provides unwavering output as battery life
diminishes

· Toughened ultra-clear mineral glass with anti-reflective coating

· Constructed from aero-grade aluminum alloy

· Rugged HAIII military grade hard-anodized finish

· Comfortable chafe-free and breathable nylon headband

· Waterproof in accordance with IPX-8 (two meters submersible)

· Impact resistant to 1.5 meters

· Tail stand capability

Dimensions

Length: 90mm (3.39”)
Head Size: 70mm × 22mm (1.26”)
Weight: 135g (4.59oz)(without battery)

Accessories

USB cable, spare port plug and O-ring

Battery Options

Primary Lithium battery

18650 Rechargeable Li-ion battery

Rechargeable Li-ion battery

SIZE

CR123 3V

18650 3.7V

RCR123 3.7V

Compatible

Y (Recommended)

Y (Recommended)

Y

Nominal voltage

Output & Runtime

TURBO

900

LUMENS

1×18650

4

5

min

2×CR123

1

3000

NITECORE (SYSMAX) is a member of PLATO, participating in and helping to develop
the ANSI/NEMA FL1 standard of measurement. Product testing data is in accordance
with these internationally recognized scientific standards.

HIGH LOWER

530*

LUMENS

2h 200h

h

1h30

min

110

m

(Beam Distance)

cd

(Peak Beam Intensity)

1.5m

(Impact Resistant)

IPX-8, 2m

(Waterproof AND Submersible)

NOTICE

The above data has been

0.2*

measured in accordance with the

LUMENS

international flashlight testing
standards ANSI/NEMA FL1 using
one x 3.7V 2600mAh Nitecore
18650 battery and 2 x 3V
1550mAh Nitecore CR123
batteries under laboratory

120

h

conditions. The data may vary
slightly during real-world use due
to battery type, individual usage
habits and environmental factors.

*Infinite brightness adjustment
varies from 0.2 to 530 lumens
and is manually adjusted via
sliding a switch. Subsequently,
runtime will vary anywhere from 2
hours to 200 hours depending on
chosen level of output.

Battery Installation

Insert 1 x protected 18650 battery
(recommended) or 2 x CR123A / 2 x
RCR123 batteries with the positive (+)
and negative (-) ends corresponding
with the diagram below.

WARNING

Ensure when turning the HC90 on, the
beam is directed away from the eyes of
people or animals.

HC90

User Manual

General Operation

The HC90 utilizes a sliding switch to access the light’s numerous functions and
brightness levels. With HC90 head facing forward, the order of modes (sliding the
switch from right to left) are as follows: blue mode -> green mode -> red mode ->
standby mode / off -> infinite brightness mode (ultra-low to high) -> turbo mode.
These modes may be cycled through in reverse by sliding the switch from left to right.
When using the HC90 in infinite brightness mode, runtime will increase when lower
levels of output are selected. On its lowest setting, the HC90 will run continuously for
up to 200 hours and on its highest setting continuously for up 2 hours.
NOTE: A fully charged 18650 lithium-ion battery has a standby time of approximately
6000 hours (off position on the sliding switch). To prevent battery drain entirely (for
example during long periods of inactivity) Nitecore suggests unscrewing the battery
cap approximately half a turn. This will physically cut power to the headlamp and also
help prevent accidental activation.

Charging Function

HC90 is capable of charging a protected 18650 li-ion battery using the included USB
cable. Simply install a protected 18650 li-ion cell, plug one end of the USB cable into
the HC90’s mini USB port and the other end into a universal USB port or adaptor as
shown in the adjacent image.

1.Fully charging a depleted 18650 li-ion battery takes approximately 6 hours.

2.Under normal charging conditions, the red indicator light near the charging port will
blink every 1.5 seconds.

3.If a problem is detected during the charging process, the HC90 will stop charging
and the red indicator will blink rapidly.

4.When charging is complete, the red indicator will illuminate steadily.

Warning: The HC90’s charging functionality is
designed for 18650 rechargeable li-ion only. Do not
attempt to charge non-rechargeable batteries such
as CR123 or other types of rechargeable cells such
as RCR123 batteries.

Thermal protection

As the HC90 is very compact, extended operation in turbo mode will cause the body
temperature to continually rise, thus potentially making it too hot for comfortable use.
As a result, Nitecore does not recommend using the HC90 in turbo mode for extended
periods. To prevent overheating, the HC90 has a built-in thermal protection sensor
which prevents overheating by automatically reducing output when a temperature of
55°C is reached. This function ensures user safety and protects the headlamp from
failure / damage.
Precaution: When the headlamp is hot, do not attempt to cool it by submerging in
liquid as differences in internal and external air pressure may cause water ingress and
irreparable damage.

Changing Batteries

Batteries should be replaced or recharged when output appears to be dim or the
flashlight becomes unresponsive.

Maintenance

Every 6 months, threads should be wiped with a clean cloth followed by a thin coating
of silicon-based lubricant.

Warranty Service

All NITECORE® products are warranted for quality. DOA / defective products can be
exchanged for replacement through a local distributor/dealer within the 14 days of
purchase. After 14 days, all defective / malfunctioning NITECORE® products will be
repaired free of charge for a period of 18 months from the date of purchase. After 18
months, a limited warranty applies, covering the cost of labor and maintenance, but
not the cost of accessories or replacement parts. The warranty is nullified in all of the
following situations:

1. The product(s) is/are broken down, reconstructed and/or modified by unauthorized
parties.

2. The product(s) is/are damaged through improper use.

3. The product(s) is/are damaged by leakage of batteries.

For the latest information on NITECORE® products and services, please contact your
national NITECORE® distributor or send an email to [e-mail]

The Nitecore official website shall prevail in case of any product data changes.

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SYSMAX Industry Co., Ltd.

TEL: [phone]
FAX: [phone]
E-mail: [e-mail]
Web: www.nitecore.com
Address： Rm1407-08, Glorious Tower, 850 East Dongfeng Road,

Guangzhou, China 510600

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