NITECORE MH23 Rechargeable LED Flashlight User Manual
- June 6, 2024
- Nitecore
Table of Contents
NITECORE MH23 Rechargeable LED Flashlight
Features
- High-performance rechargeable palm-sized spotlight
- Utilizes a CREE XHP35 HD LED to emit a maximum output of 1800 lumens
- Crystal Coating Technology combined with “Precision Digital Optics Technology” for extreme reflector performance
- A maximum beam intensity up to 21600cd and a maximum beam distance up to 294 meters
- Utilizes a two-stage power switch to control all functions
- High efficient constant circuit with a runtime of 330 hours
- Integrated power indicator light displays remaining battery power (Utility Model Patent, NO. ZL201220057767.4)
- Power indicator displays battery voltage (accurate to 0.1V)
- Intelligent Li-ion battery charging circuit (via Micro-USB charging port)
- Integrated advanced temperature regulation (ATR) technology
- Reverse polarity protection
- Optics lens with anti-reflective coating
- Constructed from rugged aero-grade aluminum alloy
- Rugged HAIII military grade hard-anodized aluminum alloy
- IPX8 waterproof (2 meters submersible)
- Impact-resistant to 1 meter
- Tail stand capability
Specification
- Length: 4.38” (111.3mm)
- Head Diameter: 1.25” (31.8mm)
- Tail Diameter: 1” (25.4mm)
- Weight: 3.39oz (96.2g)
Accessory
- USB cable, holster, clip, lanyard,
- rubber cover, spare O ring
Optional Battery
| Size | Nominal voltage | Compatible | |
|---|---|---|---|
| NITECORE NL1835HP (3500mAh) | 18650 | 3.6V | Yes (Recommended and can be |
recharged)
Rechargeable IMR18650 Li-ion Battery| IMR18650| 3.6V/3.7V| Yes (Recommended
and can be recharged)
18650 Li-ion Battery (output ≥ 8A)| 18650| 3.6V/3.7V| Yes (can be recharged)
Primary Lithium Battery| CR123| 3V| Yes (Compatible but can NOT be recharged)
Rechargeable Li-ion Battery| RCR123| 3.6V/3.7V| Yes (Compatible but can NOT be
recharged)
18650 Li-ion Battery (output < 8A)| 18650| 3.6V/3.7V| NO
Operating Instructions
Battery Installation
Insert battery as illustrated in the diagram:
Note: After battery installation, the power indicator beneath the power switch
will blink to indicate battery voltage.
Please refer to the “Power Tips” section of this manual for details.
Warning
-
Ensure batteries are inserted with the positive (+) end pointing to the head. The MH23 will not operate with incorrectly inserted batteries.
-
CAUTION! Possible dangerous radiation! Don’t look into the light! Maybe dangerous for your eyes.
-
When the power level of the IMR18650 Li-ion battery is low, please stop using and recharge the battery.
-
When the flashlight is kept in a backpack, please loosen the tail cap to prevent accidental activation of the flashlight; When it is left unused
for extended periods of time, please remove all batteries to prevent battery leakage. -
Do not submerge the product in water or any liquid when it has generated sufficient heat, doing so will cause pressure inequalities and significantly increase the risk of water damages.
ON/OFF
This product uses a two-stage power switch (similar to camera shutter). Access
to its various functions depends on how hard the switch is pressed.
Turn on: When the light is off, press the switch all the way down to turn the
light on and enter the previously used mode.
Turn off: When the light is on, press the switch all the way down to turn the
light off.
Changing Brightness Level
When the light is on, press the switch partway to cycle through “Ultralow-Low- Mid-High-Turbo”. (The MH23 memorizes its previously used brightness level and returns to it the next time it is turned on.)
Direct Access to Turbo/Ultralow
Direct Access to Ultralow: When the light is off, press the switch partway for
0.6 second to enter Ultralow.
Direct Access to Turbo: When the light is off, press the switch all the way
down and keep holding to enter momentary Turbo. Release to turn off the light;
When the light is on, press the switch partway to enter momentary Turbo, and
return to the previously used brightness level by releasing the press.
Accessing Special modes (Strobe/SOS/Beacon)
When the light is on, press the switch all the way down for over 0.6 second to turn on Strobe. After Strobe is turned on, tap the switch repeatedly to cycle through “SOS-Beacon-Strobe”. In SOS mode, press the switch partway for over 0.6 second to access Strobe. Press the switch all the way down to exit.
Charging
-
MH23 is capable of charging a protected 18650 Li-ion battery using the included USB cable. Plug one end of the USB cable into the MH23’s USB port and the other end into a universal USB port as shown in the adjacent image. Under normal charging conditions, the blue indicator
will blink every 1.5 seconds. When charging is complete, the MH23 will automatically terminates charging, and the blue indicator will illuminate steadily. If a problem (battery damage, reverse polarity, a loose tail cap or head etc.) is detected, the MH23 will stop charging and the blue indicator will blink rapidly. -
Fully charging a depleted 18650 Li-ion battery takes approximately 6 hours.
-
During charging, press the switch partway/all the way down, the blue indicator will blink to report the voltage.
-
When pulling out the cable, the blue indicator will blink to report the voltage.
Power Tips
Every time the battery is installed, the blue indicator beneath the switch
will report battery voltage (to the nearest ±0.1V) For example, when the
battery voltage is at a maximum charge of 4.2V, the power indicator will blink
4 times, followed by 1.5 seconds pause and 2 more blinks before entering the
standby status. Different voltages represent the corresponding remaining
battery power levels:
Note: when using two CR123/RCR123 in series, the flashlight only reports the average voltage between the two batteries.
Positioning
When the light is off, press the switch partway to turn the position indicator on. The blue position indicator will blink once every 2 seconds to indicate its location. This serves to alert users to the location of the MH23. With the MH23 fully charged, it will remain operational for 6 months with the position indicator activated, and 12 months in standby with the position indicator deactivated. Press the switch partway to exit the positioning function.
ATR (Advanced Temperature Regulation)
With Advanced Temperature Regulation module, the MH23 regulates its output and adapts to the ambient environment, maintaining optimal performance.
Changing Batteries
Change the batteries when the output appears to be dim or 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. DOA/defective products can
be exchanged for replacement through a local distributor/dealer within the 15
days of purchase. After 15 days, all defective/malfunctioning NITECORE®
products will be repaired free of charge for a period of 60 months from the
date of purchase. After 60 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:
- The product(s) is/are broken down, reconstructed and/or modified by unauthorized parties.
- The product(s) is/are damaged through improper use. (i.e. reverse polarity installation)
- 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 send an email to service@nitecore.com. The NITECORE official website shall prevail in case of any product data changes.
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