®
The All-Round Flashlight Expert
User Manual
EC4S
Features
·Solid lightweight aero grade aluminum alloy construction
·Utilizes a CREE XHP50 LED
·Maximum output up to 2150 lumens
·Dual switch design offers unprecedented ease of use
·Thumbscrew lock on tailcap doubles as a tripod receiver
·5 brightness levels and 3 special modes available
·High efficiency constant current circuit enables maximum runtime up to 325 hours
·Features advanced temperature regulation (ATR) technology
·A power indicator built into the on/off switch indicates remaining battery power (Chiese Patent :
ZL201220057767.4))
·Direct access to ultralow and turbo outputs
·A micro-textured reflector offers wide angle lighting
·Reverse polarity protection prevents damage arise from incorrectly inserted batteries
·Stainless steel retaining ring protects core components from damage
·Toughened ultra-clear mineral glass with anti-reflective coating
·Waterproof in accordance with IPX-8 (2 meters submersible)
·Impact resistant to 1.5 meters
·Tail stand capability
Dimensions
Length: 5.90” (150mm)
Head diameter: 1.57” (40mm)
Tube: 1.54” × 1.10” (39mm×28mm)
Weight: 6.03oz (171gram) (without battery)
Brightness Levels
With the light turned on, press the mode switch repeatedly to cycle through brightness levels of
ultralow, low, medium, high and turbo. This mode has memory effect that ensures direct access to
the brightness level last used.
Direct Access to Ultralow/Turbo
With the light turned off, press and hold the on/off switch for over one second to enter ultralow
level (2 lumens).
With the light turned off, press and hold the mode switch for over one second to enter turbo
level (2150 lumens).
Special Modes (Strobe/Location Beacon/SOS)
With the light turned on, press and hold the mode switch for over one second to enter strobe
mode. To cycle through location beacon/SOS/strobe modes, press and hold the mode switch for
over one second again. To exit, press the on/off switch to turn the light off.
Strobe Ready
With the light turned off, press the mode switch twice in quick succession to enter strobe mode
directly. To exit, simply press any switch to turn the light off.
Lockout/Unlock
With the light turned on, press and hold both switches for over one second to switch the light off
and enter lockout mode. In this mode, the two switches will not have their respective functions,
thus preventing accidental activation. To unlock, press and hold both switches for over one second
again.
NOTE:
1. When in lockout mode, the EC4S will remain operational using 2x18650 batteries for over 12
months.
2. When the EC4S is kept in a backpack or left unused for extended periods, Nitecore
recommends batteries are removed to cut off power entirely and thus prevent battery leakage or
accidental activation.
Power Tips
After battery installation or with the mode switch being pressed when the light is off, the blue
power indicator built into the switch will blink to indicate remaining battery power. The power
indicator will blink three times when power levels are above 50%; twice when power levels are
below 50%; and once when battery is close to depletion.
ATR Technology
Advanced temperature regulation (ATR) technology allows the EC4S to dynamically adjust output
performance according to its internal temperature. This prevents damage from overheating and
prolongs its working life.
Changing / Charging Battery
Batteries should be replaced or recharged when output appears to be dim or the flashlight
becomes unresponsive.
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. Any defective / malfunctioning NITECORE®
product can be repaired free of charge for a period of 60 months (5 years) from the date of
purchase. Beyond 60 months (5 years), 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 a local
※All images, text and statements specified herein this user manual are for reference purpose only.
Should any discrepancy occurs between this manual and information specified on
www.nitecore.com, information on our official website shall prevail. Sysmax Industry Co., Ltd.
reserves the rights to interpret and amend the content of this document at any time without prior
notice.
Output & Runtime
NOTICE:
The stated data has been
measured in accordance
with the international
flashlight testing standards
ANSI/NEMA FL1, using 2
x Nitecore 18650 Li-ion
batteries (3.7V, 2600mAh)
or 4 x Nitecore CR123
batteries (3V, 1700mAh)
under laboratory
conditions. The data may
vary in real-world use due
to different battery usage
or environmental
conditions.
Operating Instructions
Battery installation
As illustrated, rotate the thumbscrew lock counterclockwise and screw the tail cap off. Insert
batteries with the negative (-) ends contacting the springs, and then tighten the thumbscrew lock
clockwise.
Accessories
Quality holster, lanyard
Battery Options
Thanks for purchasing NITECORE!
SYSMAX Industry Co., Ltd.
TEL: +86-20-83862000
FAX: +86-20-83882723
Web: www.nitecore.com
Address: Rm1401-03, Glorious Tower, 850 East Dongfeng Road,
Guangzhou, China 510600
NOTE: After battery insertion, the
power indicator light will blink to
indicate remaining battery power.
Please refer to the “Power Tips”
section of this manual for details.
WARNING:
1. Do not mix rechargeable and
non-rechargeable batteries.
2. Do not mix batteries of different
types/brands.
20150921
TYPE
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
TURBO HIGH MID LOW
LUMENS
1100
LUMENS
2150
LUMENS
400
LUMENS
80
2
h15min
45
min
30
h45min
6
h15min
2
h
30
min
23
h15min
5
h45min
ULTRALOW
LUMENS
2
325
h
210
h
280m
(Beam Distance)
19600cd
(Peak Beam Intensity)
IPX-8, 2m
(Waterproof AND Submersible)
1.5m
(Impact Resistant)
4×CR1232 ×18650
On/Off Operation
To switch on: Press the on/off switch to turn the light on
To switch off: Press the on/off switch again to turn the light off and enter standby mode
Standby Mode
With the light turned on, press and hold the on/off switch for over one second to turn the light off and
activate the power indicator to blink once every three seconds, thus helping users locate the EC4S in
dark environments. When powered by 2x18650 batteries, the EC4S can operate for over 6 months with
the power indicator on, or remain on standby for over 12 months with the power indicator off.
Thumbscrew lock
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