NITECORE MT25 User Manual
User manual, Features, Dimensions

®
User Manual
Features
• LED Premium CREE XP-G R5 LED
• Maximum output of up to 390 lumens
• High efficiency current circuit board 
• Maximum runtime of up to 45 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
• Anti-rolling design
• Reverse polarity protection
• Broad voltage drive circuit, compatible with rechargeable and 
non-rechargeable Li-ion batteries.
• Toughened ultra-clear mineral glass with anti-reflective coating
• Optimization design of precise reflector, a better throwing distance than 
competing products.
• Aero grade aluminum alloy
• HA III Military grade hard anodized
• Detachable two-way anti-rolling clip
• Purpose-made rhombic knurling for better grip
• IPX-8 standard waterproof (submersible to two meters)
Dimensions
Length: 142mm (5.6”)
Head Diameter: 34mm (1.34”)
Tail Diameter: 25.4mm (1”)
Weight: 124.5grams (4.4oz)(without battery)
Thanks for purchasing NITECORE!
SYSMAX Industry Co., Ltd.
TEL:
+86-20-83862000
FAX:
+86-20-83882723
E-mail:
Web:
www.nitecore.com
Address: Rm1407-08, Glorious Tower, 850 East Dongfeng Road,
Guangzhou, China 510600
Battery Options
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Operation instructions
Battery installation (as the picture shows)
1. Unscrew the tail cap in a counter-clockwise direction.
2. Insert one 18650 battery or two CR123 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 until a second time until a “click” is 
heard. 
Mode Switching
The Nitecore MT25 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 users contains five selectable 
sub-modes. 
Turbo Mode
Turbo mode is accessed when the MT25 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 MT25 your perfect multi-task flashlight.
NITECORE MT25 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 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 though 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]
Accessories
Clip, tactical ring, lanyard, 
quality holster, spare plastic cap, 
and spare O-ring
SIZE
Nominal voltage
Compatible
Primary Lithium battery
CR123
3V
Y (Recommended)
18650 Rechargeable Li-ion battery
18650
3.7V
Y (Recommended)
Rechargeable Li-ion battery
RCR123
3.7V
Y
Brightness & Runtime
18650
2×
CR123
TURBO
HIGH
MID
LOW
LUMENS
180
LUMENS
390
LUMENS
70
LUMENS
20
2
h
5
h
15
h
45
h
1
h
45
min
4
h
15
min
13
h
40
h
228m
(Beam Distance)
13000cd
(Peak Beam Intensity)
IPX-8, 2m
(Waterproof AND Submersible)
1.5m
(Impact Resistant)
NOTICE
Stated data has been 
measured according to 
the international 
flashlight testing 
standards ANSI/NEMA 
FL1 using a quality 
NITECORE 18650 (3.7V 
2600mAh) battery or two 
SYSMAX CR123 (3V 
1550mAh) batteries 
under laboratory 
conditions. The data may 
vary due to individual 
usage habits and 
environmental 
conditions.
WARNING
Ensure batteries are inserted with 
the positive (+) end pointing to the 
head. The MT25 will not operate 
with incorrectly inserted batteries.
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.
