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Nitecore MT21C Right-Angle LED Flashlight

Nitecore MT21C Right-Angle LED Flashlight
Key Features
  • 1/50/190/400/1000 Lumens
  • SOS, Location Beacon, Strobe Functions
  • Adjustable 90° Tilting Head
Living up to the name of the Multi-Task series of which it is a member, the Nitecore MT21C Right-Angle LED Flashlight is a versatile and powerful illumination tool useful for any situation.
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Nitecore MT21C Overview

  • 1Description
  • 2Light Performance
  • 3Switching
  • 4Construction Details
  • 5Electronics

Living up to the name of the Multi-Task series of which it is a member, the Nitecore MT21C Right-Angle LED Flashlight is a versatile and powerful illumination tool useful for any situation.

It features five primary outputs; from a minimum of just one lumen for close-up tasks like reading or checking ID's, to a darkness piercing 1000-lumen turbo output that can be used to light trails and camps or search for lost hikers. Beyond the impressive output range are three specialty modes: a disorienting strobe, an emergency SOS distress signal, and a battery-conserving location beacon. All of these modes can be accessed through a single push button, and you have the ability to go directly to the minimum and turbo outputs without having to cycle through all the others.

The defining characteristic of the MT21C is the tilting emitter head. In the 0° (straight) orientation it looks and is used like a conventional flashlight, but tilt the head 90° forward and it converts into a right-angle task or tactical light. This tilting can be done with a single finger for easier use and handling. Designed to withstand the rigors of everyday use, the body is made of a lightweight and durable aluminum alloy that is treated with a scratch-resistant, hard-anodized finish. It is O-ring sealed to be waterproof and submersible to over six and a half feet, and impact resistant to over three feet. Nitecore designed the light with a magnetic base and an integrated hang loop to add even more versatility to an already versatile light. Leaving your hands free for tasks, it also allows you to point the beam right where you need it. The head of this clever little 1000-lumen torch swivels 180° and tilts 90°, and the light is equipped with a belt/pocket clip and a hanging loop. On-off switching and brightness selection is controlled by a push button on the head. A single 18650mAh lithium-ion AA battery (sold separately) will power the flashlight for approximately one hour on high power and up to 700 hours at just one lumen output.

The MT21C is made of aluminum with a type III hard anodized finish and features a glass lens with anti-reflective coating for optimal light transmission. It's IPX8-rated water resistant, submersible to 6.6', and impact resistant to 3.3'.

Light Performance
  • Min: 1 lumen
  • Low: 50 lumens
  • Med: 190 lumens
  • High: 400 lumens
  • Turbo: 1000 lumens
  • White CREE XP-L HD V6 LED
  • Emitter head tilts from 0-90°, converting it from a conventional hand-held light to a right-angle light; tilt can be done one-handed
  • Three specialty output modes
  • Digitally-regulated output maintains consistent beam intensity throughout battery charge

Specialty outputs:

  • Disorientating strobe function
  • Emergency SOS signal automatically cycles through the Morse code sequence
  • Location beacon emits a single pulse at regular intervals to conserve battery power


  • Location: Handle
  • Type: Push button
  • Instant access to minimum and Turbo outputs
  • Press and hold to turn on, then cycle through primary outputs
  • Tap button three times in any mode to activate specialty outputs
Construction Details
  • Lightweight and durable aluminum alloy body
  • Tempered emitter window with anti-reflection coatings ensure maximum beam output at all intensity levels
  • Textured handle helps to provide a slip-resistant grip
  • Scratch and corrosion-resistant anodized hard-coat
  • IPX8-rated and O-ring sealed to be waterproof and submersible to 6.6'
  • Impact resistant to 3.3'
  • Magnetic base on handle allows it to stick to any ferrous metals, with integrated hang loop
  • Runs on one user-supplied 18650 battery, or two CR123 disposable or rechargeable batteries
  • Integrated battery status indicator on push-button switch
  • Reverse polarity protection prevents damage to the light & circuitry if batteries are installed incorrectly
  • Advanced Temperature Regulation (ATR) circuitry monitors light and ambient temperatures to maximize output and battery life

Nitecore MT21C Specs

Illumination Source
1 x LED
Weapon Mountable
Estimated Runtime
18650 Lithium-Ion: 1 to 700 Hour
Battery Type
1 x 18650 Lithium-Ion or
2 x CR123A Lithium, Lithium-Ion
Material of Construction
Water Resistance
Waterproof to 6.6' / 2 m, IPX8
Environmental Protection
Advertised as Submersible to 6.6' / 2 m
*Manufacturer Testing: IPX8
Impact Resistance
Yes, 3.3' / 1.0 m
ø: 1.0 x L: 5.2" / ø: 2.5 x L: 13.1 cm
2.3 oz / 64.8 g (Without Batteries)
Packaging Info
Package Weight
0.435 lb
Box Dimensions (LxWxH)
8.45 x 4 x 1.4"

Nitecore MT21C Reviews

Periscope UP!

By Richard
Rated 5 out of 5
Date: 2023-09-12

It's tight enough adjusting the tilt angle that you can virtually place at any angle. It has 4 detents before it reaches 90 degrees. Solid build for a simple light.


By Gordon
Rated 5 out of 5
Date: 2023-01-27

Got this for work in dark areas, brighter than my other lights by far!

Well-Rounded Light... For a Price

By Daniel
Rated 4 out of 5
Date: 2019-10-15

This flashlight is well thought out and engineered with a broad spectrum of uses in mind. There are a number of luminance levels: Unlike other lights I own, this one actually has a very dim setting and equal steps between the levels leading up to a very bright turbo mode. The button is held to turn the led on/off, then clicked to change brightness. Or you can double click to activate the S.O.S. and strobe modes. The strobe is very bright and fast. I'm a video engineer and two things I use constantly are the magnetic base and the swivel head. This light can be stuck to the inside of equipment racks, to the side of my truck, or clipped to my shirt. It's lightweight, but feels sturdy. The battery must be removed in order to be recharged. I assume this design removes the need for a charging port on the light, making it submersible (I haven't gotten it wet yet). All in all, this flashlight checks all the boxes in terms of usability for me, which I expect in this price range, but it's really nice to have all of these features in such a small, lightweight package.

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