Welcome back! We saved your shopping cart for you: View Cart

Nitecore E4K Compact EDC Flashlight - 4 x CREE XP-L2 V6 - 4400 Lumens - Uses 1 x 21700 (Included) or 2 x CR123A or 2 x RCR123

Nitecore E4K left side angle
Nitecore E4K right side angle
Nitecore E4K side profile
Nitecore E4K upright
Nitecore E4K LED
Nitecore E4K in hand
Nitecore E4K accessories
Nitecore E4K packaging front
Nitecore E4K packaging back
Nitecore E4K left side angle
Nitecore E4K right side angle
Nitecore E4K side profile
Nitecore E4K upright
Nitecore E4K LED
Nitecore E4K in hand
Nitecore E4K accessories
Nitecore E4K packaging front
Nitecore E4K packaging back
Click to Enlarge Image
Usually ships the next business day

Request a Volume Quotation

Battery Junction 30 Day Warranty
Every Order Ships Directly From The United States
Authorized Dealer For All Products Sold
Battery Junction Wholesale Account Signup
Battery Junction Free Keylight On Purchases Over $20 Promo

Nitecore E4K Compact EDC Flashlight

Remarkably High Output from an EDC Light

The Nitecore E4K is a tiny monster packed into a compact, EDC light! With the integration of four CREE XP-L2 V6 LEDs, this Nitecore light can emit 4400 lumens in turbo mode excellent for walking at night, camping, and more. Equipped with a 21700 battery, the E4K is capable of a 30 day runtime in ultralow thanks to the immense capacity of the battery. The Nitecore E4K functions through a large side switch designed for comfortable single-handed activation. Easy to press bare-handed or with gloves, the side switch utilizes a simple user-interface with hold, short, double, and triple press shortcuts to quickly get to your desired output. In a hurry to get to your most frequently used mode? No need to worry because the E4K has a mode memory allowing for automatic access to the last mode.


  • Optical system with crystal coating with Precision Digital Optics technology
  • Highly efficient constant current circuit provides a stable output for up to 700 hours
  • One side switch specially designed to control 5 brightness levels and 3 special modes
  • Strobe mode uses randomly changing frequencies for stronger dizzying effects
  • Power indicator located underneath the side switch to indicate battery power
  • Electronic reverse polarity protection
  • Optical lenses with double-sided scratch-resistant coating
  • Constructed from an aero-grade aluminum finish
  • HAIII military-grade hard-anodized finish
  • Tail stand capability

Included Accessories:

  • E4K Flashlight
  • Nitecore 21700 Rechargeable Li-ion battery (NL2150HPR 5,000mAh)
  • USB-C charging cable
  • CR123A Battery Magazine
  • Two-way pocket clip
  • Holster
  • Lanyard
  • Spare O-ring


  • Power Source: 1 x 21700, 2 x CR123A/RCR123A (with battery magazine)
  • LED: 4 x CREE XP-L2 V6
  • Output / Runtime / Throw:
    • Turbo: 4400 lumens / 30 minutes** / 211 meters
    • High: 1050 lumens / 3 hours 15 minutes / 105 meters
    • Medium: 320 lumens / 7 hours 30 minutes / 57 meters
    • Low: 50 lumens / 45 hours / 21 meters
    • Ultralow: 2 lumens / 700 hours / 21 meters
    • Strobe: 4400 lumens
    • SOS: 4400 lumens
    • Beacon: 4400 lumens
    • ** Turbo level is only accessible when using a 21700 battery with an output over 15A - not accessible using CR123A batteries. Turbo mode tested without temperature regulation
  • Peak Beam Intensity: 11,100cd
  • Impact Resistance: 1 meter
  • Waterproof Rating: IP68 (2 meters submersible, waterproof)
  • Dimensions:
    • Length: 4.62" (117.56mm)
    • Head Diameter: 1.13" (28.6mm)
    • Tube Diameter: 1.02" (25.8mm)
    • Tail Diameter: 1.11" (28.1mm)
  • Weight: 2.82oz (80g)
Runtime (Hours):
Output Modes:3+ Brightness Levels, Beacon, SOS, Strobe
Compatible Batteries:1 x 21700, 2 x 16340, 2 x CR123A, 2 x RCR123A
Batteries Included:Yes
Included Accessories:Batteries, Battery Magazine, Holster, Lanyard, Pocket Clip, Spare O-ring(s), USB Cable
Flashlight Usage:Every Day Carry
Throw Distance (Max):211m
Switch Location:Body
Product Certifications:IP68
Warranty:Battery Junction 30-Day Warranty, Nitecore 5 Year Warranty
Return Policy:Battery Junction Return Policy
Primary Material:Aluminum
Product Weight:2.82oz
Product Dimensions:4.62" (L) x 1.13" (Head Diameter)1.02" (Body Diameter)
Country of Origin:CN
By *Harvey R.
Thousand Oaks, CA
Extremely Powerful and Small
May 21, 2020
The is a very high powered light packed into a small body. On turbo you get 4400 lumens (in less than 5 inches length) with a decent run time of 30 mins and on high you get 1050 lumens for 3 hrs15 mins. The main problem with it (for which I took away a star) is the UI, as someone else mentioned. It is overly complicated and difficult to remember how to get to settings unless you use it frequently. However, it does have a last setting memory, which helps. The amount of light out front on turbo is in the neighborhood of that produced by the Tiny Monster series, but in a very compact form. If they would only streamline the UI, I would unhesitatingly recommends this light. As it is, it still is state-of-the-art.
By Joseph
Cincinnati, OH
Very brite
May 12, 2020
For a small light this thing is powerful. Very easy to use with one switch and it has all of the bells and whistles. The only thing I don't like is the batt that comes with it has USB charging but has to be removed to charge it.
By Julia T.
Awesome light seriously hampered by a horrible UI
April 17, 2020
To start, the good parts: the form factor of this light is great, and the output is astonishing, even if it can't keep up the blazing turbo mode for more than about 20 seconds. The USB-C port on the *battery* is a strange choice, but seems to do the trick.

What kills this light for me is the UI. It's definitely different compared to other Nitecore lights, but that's not necessarily bad! Several individual "papercuts" make the UI downright *bad*:

1. Turning the light on is slow: it requires holding the power button down (pressing it briefly once just shows the battery level). I'm sure this was done to prevent accidentally powering the light on in a backpack, but it's irritating.

2. Changing modes is slow:: it requires holding the power button down past when the light turns on, then waiting about one second per mode as it cycles through ultralow/low/medium/high/turbo.

3. Changing modes is potentially physically painful: You can't start at ultralow; you're stuck at whatever mode you last used (and using the double-click-from-off shortcut to get to ultralow doesn't get around this). This means if you want to go from medium to low, you have to start with the light off, hold the button down, wait for it to turn on, wait for it to cycle to high, turbo, ultralow, and then low, then release the button. If you're in a dark environment, you've got two choices: point it somewhere and scorch your eyes, or cover the end of it and burn your hand (it gets that hot in the one second it's on turbo!).

4. If you start with the light on and try to turn the light off (one click from on) and turn it back on in ultralow (two clicks from off), you risk entering turbo (three clicks from on) accidentally. I've done this twice in the first hour of using it and it's annoying as heck.

I'm probably not returning this because of the UI, but there are folks who are, and I entirely understand their decision.
By Greg
Fogelsville, PA
Super-nice light
March 25, 2020
Small size, but great features; especially the very low end and great coverage in turbo. It's blindingly bright!
By Steve
"Tiny" Tiny Monster
February 29, 2020
I believe this light would fit into the Tiny Monster category quite easily. It's smaller than some of the 18650 lights that I own, and way, way brighter. Output modes spaced perfectly in my opinion and when you call on that turbo mode, holy cow !!! When out with the dog on the night walk 50 lumens is the normal. Press and hold the switch and prepare to be amazed. What comes to mind is those construction lights you see crews using doing night work on the highway. Stupid bright really, but if you want to see all the trees around you light up, press and hold. Instant access to ultra low, memory, turbo gives operator multiple lighting options. Switch is large and easy to find even with gloves on. Will turn on in front pocket so I loosen the tail cap to prevent accidental activation. Battery capacity is excellent. Been using about a week and a half and still showing 4.1 volts. That's with numerous short bursts of that incredible turbo mode too. Great job designing and building this one Nitecore.
There are no questions or answers for this item.

Related Items

Nitecore E4K Compact EDC Flashlight - 4 x CREE XP-L2 V6 - 4400 Lumens - Uses 1 x 21700 (Included) or 2 x CR123A or 2 x RCR123

  • $89.95
  • This Item Qualifies For FREE SHIPPING
  • In Stock