Nitecore E4K Next Generation - 4400 Lumen Compact EDC Flashlight Manual

Features

• Utilizes 4 x CREE XP-L2 V6 LEDs with a max output of 4,400 lumens
• An optical system combined with crystal coating and "Precision Digital Optics Technology" (PDOT)
• Maximum peak beam intensity of 11,100cd and maximum throw of 211 meters
• Highly efficient constant current circuit provides a stable output for up to 700 hours
• One side switch specially designed for outdoor applications controls 5 brightness levels and 3 special modes
• STROBE Mode uses randomly changing frequencies for stronger dizzying effects
• A power indicator beneath the side switch indicates the remaining battery power (Patent No. ZL201220057767.4)
• The power indicator can display the battery voltage (±0.1V)
• NITECORE 21700 rechargeable Li-ion battery (NL2150HPR 5,000mAh) included
• Incorporated Advanced Temperature Regulation (ATR) module (Patent No. ZL201510534543.6)
• Electronic reverse polarity protection
• Optical lenses with double-sided scratch resistant coating
• Constructed from aero grade aluminum alloy
• HA III military grade hard-anodized finish
• Waterproof in accordance with IP68 (2 meters submersible)
• Impact resistant to 1 meter
• Tail stand capability

Specifications

Length: 117.56mm (4.63")
Head Diameter: 28.6mm (1.13")
Tube Diameter: 25.8mm (1.02")
Tail Diameter: 28.1mm (1.11")
Weight: 80g (2.82oz)

Accessories

NITECORE 21700 Rechargeable Li-ion Battery (NL2150HPR 5,000mAh), USB-C Charging Cable, Clip, Lanyard, Spare O-ring, Holster, CR123 Battery Magazine

Battery Options

Technical Data

FL1 STANDARD	TURBO	HIGH	MID	LOW	ULTRALOW	STROBE	SOS	BEACON
	4,400 Lumens	1,050 Lumens	320 Lumens	50 Lumens	2 Lumens	4,400 Lumens	4,400 Lumens	4,400 Lumens
	*30min	3h 15min	7h 30min	45h	700h	─	─	─
	211m	105m	57m	21m	3m	─	─	─
	11,100cd	2,800cd	810cd	110cd	3cd	─	─	─
	1m (Impact Resistance)
	IP68, 2m (Waterproof and Submersible)

Note: The stated data is measured in accordance with the international flashlight testing standards ANSI/PLATO FL 1-2019, using 1 x 21700 Li-ion battery (5,000mAh) under laboratory conditions.
The data may vary in real world use due to different battery usage or environmental conditions.
* The runtime for TURBO mode is tested without the temperature regulation.
* TURBO Availability: The TURBO level is only accessible when using a 21700 rechargeable Li-ion battery with an output over 15A. It is inaccessible when using CR123/RCR123 batteries.

Operating Instructions

Battery Installation

Insert the battery(s) as illustrated and screw to tighten the tail cap.

Note: After the battery insertion, the power indicator beneath the switch will flash to indicate the battery voltage. Please refer to the "Power Indication" section of this manual for more details.

Warnings:

1. Ensure the battery(s) is/are inserted with the positive end towards the head. The product will not work if the battery(s) is/are incorrectly inserted.
2. Please use the battery magazine when using 2 x CR123 batteries to avoid battery rattling and to ensure a stable contact.
3. DO NOT direct the beam to the naked eyes.
4. When the power level is low, please stop using the product and recharge the battery as soon as possible to prevent damage to the battery.
5. When the product is kept in a backpack or left unused for prolonged time, please remove all batteries to prevent accidental activation or battery leakage.
6. DO NOT submerge the light into any liquid when it is hot. Doing so may cause irreparable damage to the light due to the difference of air pressure inside and outside of the tube.

On / Off

On: When the light is off, press and hold the Power Button for approx. 1 second to turn it on.
Off: When the light is on, short press the Power Button to turn it off.

Brightness Levels

When the light is off, keep holding the Power Button after turning on the flashlight to cycle through the following brightness levels: ULTRALOW – LOW – MID – HIGH – TURBO. Release to select the desired brightness level. (This access has mode memory. When reactivated, the flashlight will automatically access the previous memorized brightness level.)

Direct Access to ULTRALOW

When the light is off, double press the Power Button to directly access ULTRALOW.

Momentary Access to TURBO

When the light is on, press and hold the Power Button to momentarily access TURBO. Release to returned to the previous brightness level.

Special Modes (STROBE / SOS / BEACON)

• When the light is on, triple press the Power Button to access the STROBE Mode.
• When the STROBE Mode is on, long press the Power Button each time to cycle through the following special modes: SOS – BEACON – STROBE.
• When one of the special modes is on, short press the Power Button to exit special modes and turn off the light.

User Mode Selection

The E4K provides 2 user modes including Daily Mode and Tactical Mode for different users and situations.

• Daily Mode (Default Setting): When the light is off, triple press the Power Button to directly access TURBO.
• Tactical Mode: When the light is off, triple press the Power Button to directly access STROBE.

To select a desired user mode:

1. Ensure the light is turned off.
2. Loosen the tail cap.
3. Keep holding the Power Button while simultaneously tightening the tail cap.
4. Once the tail cap has been tightened, the LEDs will indicate a user mode selected by flashing once for Daily Mode or flashing twice for Tactical Mode.

Power Indication

• When the battery is inserted, the power indicator beneath the switch will flash to show the battery voltage (±0.1V). For example, when the battery voltage is at 4.2V, the power indicator will flash 4 times followed by a 1.5-second pause and 2 more flashes. Different voltages represent the corresponding remaining battery power levels:
  

Note: When using two CR123/RCR123 in series, the indicator will show the average voltage between the two batteries.

• When the light is off, short press the Power Button and the power indicator will flash to indicate the remaining power:
  1. Flashing three times indicates that the power is above 50%;
  2. Flashing twice indicates that the power is below 50%;
  3. Flashing once indicates that the power is below 10%.

ATR (Advanced Temperature Regulation)

The integrated ATR technology regulates the output of the E4K according to the working condition and ambient environment to maintain the optimal performance.

Changing Batteries

The batteries should be replaced when the output appears to be dim or the flashlight becomes unresponsive due to low power.

Maintenance

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

Warranty Service

Any DOA / defective product can be exchanged for a replacement through a local distributor/dealer within 15 days of purchase. After that, all defective / malfunctioning NITECORE repaired free of charge within 60 months from the date of purchase. Beyond 60 months, a limited warranty applies, covering the cost of labor and maintenance, but not the cost of accessories or replacement parts.
For the latest information on NITECORE ® products and services, please contact a local NITECORE ® distributor or send an email to service@nitecore.com

※ All images, text and statements specified herein this user manual are for reference purpose only. Should any discrepancy occur between this manual and information specified on www.nitecore.com, Sysmax Innovations Co., Ltd. reserves the rights to interpret and amend the content of this document at any time without prior notice.

Videos

Nitecore E4K - 4400 Lumen EDC flashlight Review Video

NITECORE E4K EDC Flashlight w/ USB-C Rechargeable 21700 Battery - Review Video

Documents / Resources

References

• http://www.nitecore.com

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