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®

ALL-ROUND Flashlight Expert

User  Manual

Features

• CREE XP-G (R5) LED
• Maximum output of up to 320 lumens
• High efficiency constant current circuit enables maximum run time of up to 

220 hours

• 5 brightness levels
• Momentary push-on strobe and SOS modes
• Dual electronic switches ensure very easy user interface
• Secondary red light mode (0.2 lumens)
• Power indicator light also serves as a battery voltage indicator (accurate to 

0.1V)

• Power indicator light serves as standby indicator light when powered down
• Broad voltage circuit accepts both rechargeable and non-rechargeable 

lithium batteries

• Toughened ultra-clear mineral glass with dual-side anti-reflective coating
• Elaborate alloy reflector is purpose-designed for exceptionally long throw
• Constructed from aero grade aluminum alloy
• HAIII military grade hard-anodized
• Stainless steel bezel retaining ring protects core components from damage
• Detachable two-way anti-rolling clip 
• Waterproof in accordance with IPX-8 (2 meters submersible)
• Tail stand function

Dimensions

Length: 99mm
Head Diameter: 25.4mm
Tail Diameter: 24mm
Weight: 59g (without battery)

Accessories 

Quality holster, lanyard, spare O-ring

Battery Options

Note:

EC2 is compatible with two primary CR123 Lithium batteries and one 

18650 rechargeable Li-ion battery. When installing battery, EC2’s built-in 

MCU will automatically detect the installed battery type, and then 

automatically select the best suited driving data and battery capacity 

detecting data.

WARNING

Always ensure batteries are inserted with the positive (+) ends pointing 

toward the flashlight head. If incorrectly installed, the flashlight will not 

work.

Switching ON/OFF

To switch ON: Press the “On/OFF” button once to turn the light on.
To switch OFF: Press the “On/OFF” button once again to turn the light 
off.

Note: 

When EC2 is off, the power indicator (red light) will flash once 

every 3 seconds to act as a locator. In this mode, the EC2 consumes a 
very little amount of current (about 0.2mA) to maintain working of the 
built-in MCU and power indicator. Under such status, two CR123 
batteries will last about 1 year in this mode.

Brightness Selection

With the flashlight switched on, each time you press the “MODE” button, 
it will go through the different preset brightness levels as follows: 
ultra-low mode→low mode→medium mode→high mode then repeat. 
Under this mode, the flashlight has a memory function. It can memorize 
the selected brightness after turning the light off, while next time turning 
on the light, it automatically resumes to the previously selected mode.

Entering Turbo Mode

With the flashlight switched on, press the “MODE” button for more than 1
Second, EC2 will enter Turbo mode. Press the MODE button again, the 
flashlight will retreat from turbo brightness and resume to previous 
brightness. In Turbo mode EC2 circuit will deliver maximum current to 
make brightness as high as possible.

Thanks for purchasing NITECORE!

Operation instructions

Battery installation

1. Unscrew (counterclockwise) and remove the tail cap.

2. Insert two CR123 batteries or one 18650 battery with the positive 

poles of the batteries pointing toward the head.

3. Replace the tail cap and fasten tightly

SIZE

Nominal voltage

Compatible

Primary Lithium battery 

CR123

3V

Y (Recommended)

18650 Rechargeable Li-ion battery

18650

3.7V

(Recommended)

Rechargeable Li-ion battery

RCR123

3.7V

Y

Note:

When EC2 is driven by 2 RCR123 batteries, the battery capacity indicator function 
cannot be activated normally.

Brightness & Runtime

Note:

1. After 30 minutes working in Turbo mode, the flashlight will 

automatically restore to the previously selected brightness level to 
safeguard against overheating.

2. While activating Turbo mode, the brightness level increases about 100 

lumens. Due to adaptability of human eyes, this brightness increase 
may not be apparent within close range observation. In real-world 
usage, Turbo mode can help EC2 throw to a longer range.

Entering Strobe and SOS Mode

With the light switched off, press the “ON/OFF” button for more than 1 
second to enter Strobe mode. In strobe mode, press any button (ON/OFF 
or MODE) to exit strobe and switch the light off.
With the light switched off, press the “MODE” button for more than 1 
second to enter SOS mode. In SOS mode, press any button (ON/OFF or 
MODE) to switch off the light and quit SOS mode.

Red Light Mode

With the light switched off, press the “MODE” button to enter red light 
mode. In this mode, the power indicator will continuously emit red light 
(0.2 lumens). Press the “MODE” button once again to quit the red light 
mode.

Lockout Mode

With the light switched on, press the ON/OFF button for over 1 second to 
enter lockout mode. In lockout mode, EC2 power source system will shut 
down most of the circuit components to reduce its power consumption. 
The MCU only consumes small amount of power to maintain its work. The 
red light indicator also switches off to save energy. Under this mode, the 
maximum consuming current is about 0.1mA, which ensures two CR123 
batteries can maintain its work for around 2 years. In lockout mode, the 2 
buttons on EC2 will not work, which can prevent the light from being 
turned on accidentally.
To exit lockout mode, simply press the ON/OFF button for more than 1 
second.

Note: 

When entering lockout mode, the red light indicator light will 
continuously flash to advise of battery voltage. Please refer to the 
“Power Indication” section below.

EC2

  

Power Indication

With the light switched on, and when the battery power has been 
consumed by about 50%, the power indicator light (on the control panel) 
will flash once every 6 seconds as a reminder of battery capacity. 
When the battery power is almost depleted, the power indicator light will 
flash 3 times every 3 seconds to indicate low battery capacity. 
When entering lockout mode, the power indicator will automatically 
detect and notify you of battery voltage (accurate to ±0.1V) with a series 
of flashes. For example, if the battery voltage is 4.2V, the indicator will 
flash 4 times, followed by a one second pause and then another 2 
flashes.

Battery replacement

If battery level is low, the red power indicator light will flash three times 
every 3 seconds. If the power level is critically low, the light will become 
very dim and unresponsive to brightness adjustment. A replacement 
battery is required at this time.

Maintenance

Every 6 months, the 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 visit our official website: 
www.NITECORE.com

3

h

50

h

11

h

220

h

TURBO

HIGH

MID

LOW

MICRO

LUMENS

220

LUMENS

320

LUMENS

80

LUMENS

15

LUMENS

2

5650cd 

(Peak Beam Intensity)

150m 

(Beam Distance)

 IPX-8, 2m 

(Waterproof AND Submersible)

1.5m 

(Impact Resistant)

NOTICE

The stated data has been measured in accordance with the international 

flashlight testing standards ANSI/NEMA FL1, using two SYSMAX CR123 

battery (3V, 1550mAH) under laboratory conditions. The data may vary in 

real-world use due to different battery usage or environmental conditions.

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