NITECORE MT21A User Manual

User manual, Features, Dimensions

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®

User Manual

Features

• LED Premium CREE XP-E2 R2 LED
• Maximum output of up to 260 lumens
• Integrated “Precision Digital Optics Technology” provides exceptional throw

capability in its class.

• Boasts a peak beam intensity of 10,000cd and a throw distance of up to 200

meters

• Maximum runtime of up to 55 hours
• Two rapid switching modes suit various user requirements.
• User-defined mode allows for customized brightness levels and a multitude of

functions

• Intelligent memory functions
• Reverse polarity protection
• Toughened ultra-clear mineral glass with anti-reflective coating
• Purpose designed reflector ensures a smooth and powerful beam
• Aero grade aluminum alloy
• HA III Military grade hard anodized
• Purpose-made rhombic knurling for better grip
• IPX-8 standard waterproof (submersible to two meters)

Dimensions

Length: 155mm (6.1”)
Head Diameter: 25.4mm (1”)
Tail Diameter: 21.5mm (0.85”)
Weight: 68grams (2.4oz)(without battery)

Thanks for purchasing NITECORE!

SYSMAX Industry Co., Ltd.

TEL:

+86-20-83862000

FAX:

+86-20-83882723

E-mail:

[email protected]

Web:

www.nitecore.com

Address: Rm1407-08, Glorious Tower, 850 East Dongfeng Road,

Guangzhou, China 510600

Brightness & Runtime

ALL-ROUND Flashlight Expert

Accessories

Lanyard, spare plastic cap,
and spare O-ring

Battery Options

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Operation instructions

Battery installation

1. Unscrew the tail cap in a counter-clockwise direction.
2. Insert two AA batteries with the positive pole pointing forward (toward the

light head).

Switching ON/OFF

Switch ON: Press the button on the tailcap until a “click” is heard.
Switch OFF: Press the button at the tailcap a second time until a “click” is
heard.

Mode Switching

The Nitecore MT21A has two modes: Turbo and user-defined. These two
modes can be changed by simply tightening and loosening the flashlight head.
Turbo provides 100% output while user-defined mode contains five selectable
sub-modes.

Turbo Mode

Turbo mode is accessed when the MT21A flashlight is switched ON and the
head lightly tightened. While in this mode, momentary illumination can be
achieved by switching off the flashlight and then half pressing and holding the
switch. Momentary illumination can be used as a flashing signal indicator or
apply to various tactical applications.

Note:

After three minutes’ using of turbo mode, the flashlight will lower its

output automatically for preventing overheating, and efficiently ensure the
battery runtime.

User-Defined Mode

User-defined mode is accessed by slightly loosening the flashlight head. In this
mode, lightly and rapidly pressing the switch will cycle through brightness and
other functions in the following order: “High-Mid-Low- SOS-Strobe”. Pressing
the switch all the way down will save and memorize a desired setting.

Tips: Make NITECORE MT21A your perfect multi-task flashlight.

NITECORE MT21A flashlights essentially have two modes: Turbo mode (100%
output) and custom mode. Turbo mode is accessed by tightening the flashlight
head while any of one of the four customizable modes (strobe, low, medium
and high) are selected by loosening the head and rapidly pressing the on/off
switch to cycle through the modes. A given mode can be saved by simply turn
off the light while in that mode. Real-world examples include: When used as a
flashlight around the home, the head can be loosened and low level selected in
custom mode, providing long runtimes at a lower light intensity. The same
flashlight could then be taken out and used as a law-enforcement duty light,
with user-defined mode set in strobe, making it easy to alternate between turbo
mode and strobe with a simple twist of the flashlight head.

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
[email protected]

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

TURBO

HIGH

MID

LOW

LUMENS

130

LUMENS

260

LUMENS

60

LUMENS

15

5

h

2

h

12

h

55

h

200m

(Beam Distance)

10000cd

(Peak Beam Intensity)

IPX-8, 2m

(Waterproof AND Submersible)

1.5m

(Impact Resistant)

SIZE

Nominal voltage

Compatible

Primary AA battery

AA

1.5V

Y (Recommended)

Rechargeable AA battery

AA

1.2V

Y (Recommended)

Primary AA Lithium battery

L91

1.5V

Y (Recommended)

Primary FeLiPO4 battery

14500

3.2V

N (Banned)

Rechargeable Li-ion battery

14500

3.7V

N (Banned)

NOTICE

Stated data has been
measured according to
the international
flashlight testing
standards ANSI/NEMA
FL1 using two high
quality AA Ni-Mh
rechargeable batteries
(1.2V, 2400mAh) under
laboratory conditions.
The data may vary due
to individual usage
habits and environmental
conditions.

WARNING

1. Ensure batteries are

inserted with the positive
(+) end pointing to the
head. The MT21A will not
operate with incorrectly
inserted batteries.

2. Please do NOT light

directly to the eyes,
which will hurt the eyes.

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

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