NITECORE MH10S Superior Performance 21700 Dual Fuel EDC Flashlight User Guide
Charging Function
Battery Installation
Features
- Utilizes a Luminus SST-40-W LED with a max output of 1,800 lumens
- Max peak beam intensity of 21,600cd and max throw of 294 meters
- An optical system combined with crystal coating and “Precision Digital Optics Technology” (PDOT)
- Powered by a 21700 high capacity Li-ion battery while compatible with 18650 and CR123 batteries, to provide a runtime up to 1,500 hours
- The metal side switch 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)
- Intelligent Li-ion battery charging circuit with a USB-C port
- NITECORE 21700 Li-ion battery included (NL2140 4,000mAh 8A)
- Highly efficient constant current circuit provides a stable output
- 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 and dustproof rating in accordance with IP68 (2 meters submersible)
- Impact resistant to 1 meter
- Tail stand capability
Specifications
Length:131.3mm (5.17”)
Head Diameter:25.4mm (1”)
Tube Diameter:25.4mm (1”)
Tail Diameter:27.2mm (1.07”)
Weight:69.7g (2.46oz)
Accessories
NITECORE 21700 Rechargeable Li-ion Battery (NL2140 4,000mAh 8A), USB-C Charging Cable, Clip, Lanyard, Spare O-ring, 18650/CR123 Battery Magazine, Tactical Holster NTH10
Battery Options
| Type | Nominal Voltage | Compatibility | |
| 21700 Rechargeable Li-ion Battery (Discharge Current Over 8A) | 21700 | 3.6V/3.7V | Y (Recommended) |
| 18650 Rechargeable Li-ion Battery (Discharge Current Over 8A) | 18650 | 3.6V/3.7V | Y (Compatible) |
| Primary Lithium Battery* | CR123 | 3V | Y (Compatible) |
| Rechargeable Li-ion Battery* | RCR123 | 3.6V/3.7V | Y (Compatible) |
| 21700 Rechargeable Li-ion Battery (Discharge Current Below 8A) | 21700 | 3.6V/3.7V | N (Incompatible) |
| 18650 Rechargeable Li-ion Battery (Discharge Current Below 8A) | 18650 | 3.6V/3.7V | N (Incompatible) |
Note: DO NOT attempt to use the MH10S to charge CR123/RCR123 batteries.
Technical Data
Using a 5,000mAh 21700 Li-ion Battery
| FL1 STANDARD | TURBO | HIGH | MID | LOW | ULTRALOW | STROBE | BEACON | SOS |
 |
1,800
Lumens |
1,050
Lumens |
300
Lumens |
50
Lumens |
1
Lumen |
1,800
Lumens |
1,800
Lumens |
1,800
Lumens |
 |
*45min | 3h 15min | 7h 15min | 45h | 1,500h | ─ | ─ | ─ |
 |
294m | 219m | 122m | 49m | 7m | ─ | ─ | ─ |
 |
21,600cd | 12,000cd | 3,700cd | 600cd | 12cd | ─ | ─ | ─ |
 |
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 of TURBO is tested without the temperature regulation.
- TURBO Availability: The TURBO level is only accessible when using a 21700/18650 rechargeable Li-ion battery with a discharge current over 8A. It is inaccessible when using CR123/RCR123 batteries.
Using a 4,000mAh 21700 Li-ion Battery:
| FL1 STANDARD | TURBO | HIGH | MID | LOW | ULTRALOW | STROBE | BEACON | SOS |
|
1,800
Lumens |
1,050
Lumens |
300
Lumens |
50
Lumens |
1 Lumen | 1,800
Lumens |
1,800
Lumens |
1,800
Lumens |
|
*30min | 2h 30min | 5h | 32h | 1,000h | ─ | ─ | ─ |
|
294m | 219m | 122m | 49m | 7m | ─ | ─ | ─ |
|
21,600cd | 12,000cd | 3,700cd | 600cd | 12cd | ─ | ─ | ─ |
|
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 (4,000mAh) under laboratory conditions. The data may vary in real world use due to different battery usage or environmental conditions.
- The runtime of TURBO is tested without the temperature regulation.
- TURBO Availability: The TURBO level is only accessible when using a 21700/18650 rechargeable Li-ion battery with a discharge current over 8A. It is inaccessible when using CR123/RCR123 batteries.
Charging Function
The MH10S is equipped with an intelligent charging system. As illustrated, after inserting the battery and tightening the tail cap, use the USB cable to connect an external power supply (e.g. a USB adapter or other USB charging devices) to the charging port to begin the charging process.
- During the charging process, the power indicator will flash slowly to inform the user.
- When the battery is fully charged, the MH10S will cease the charging process and the power indicator will turn on constantly to inform the user.
- When the charging status is abnormal (e.g. the battery is defective or inserted incorrectly), the MH10S will cease the charging process and the power indicator will flash quickly to inform the user.
- The charging time for a 21700 Li-ion battery (4,000mAh) is approx. 2 hours 45 minutes. (Charged via the 5V/2A adapter)
Operating Instructions
Battery InstallationInsert the battery(s) as illustrated and screw to tighten the tail cap.Note: After 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:
- 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.
- Please use the battery magazine when using 1 x 18650 / 2 x CR123 batteries to avoid battery rattling and to ensure a stable contact.
- CAUTION! Possible dangerous radiation! Don’t look into the light! May be dangerous for your eyes.
- When the power level is low, please stop using the product and replace or recharge the battery to prevent damage to the battery.
- 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.
On / OffOn: When the light is off, short press the Power Button to turn it on.Off: When the light is on, short press the Power Button to turn it off.
Brightness LevelsWhen the light is on, press and hold the Power Button to cycle through the following brightness levels: ULTRALOW – LOW – MID – HIGH – TURBO. Release to select the desired brightness level. (This access has memory function. When reactivated, the flashlight will automatically access the previous memorized brightness level.)
Direct Access to ULTRALOWWhen the light is off, long press the Power Button to directly access ULTRALOW.
Special Modes (STROBE / BEACON / SOS)
- When the light is on/off, double press the Power Button to access the STROBE Mode.
- When the STROBE Mode is on, press and hold the Power Button to cycle through the following special modes: BEACON – SOS – STROBE. Release to select the desired special mode.
- When one of the special modes is on, short press the Power Button to exit special modes and turn off the light. (This access does not have memory function.)
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:1×18650/ 21700 battery2×CR123 batteries
Note: When using two CR123/RCR123 in series, the indicator will show the average voltage between the two batteries. - When the light is on and the power level is close to 50%, the power indicator will flash every 2 seconds to inform the user. When the light is on and the power is close to depleted, the power indicator will flash quickly and continuously to inform the user. The batteries should be replaced or recharged when the output appears to be dim or the flashlight becomes unresponsive due to low power.
Note: When using two CR123/RCR123 in series, the indicator will show the average voltage between the two batteries.ATR (Advanced Temperature Regulation)
The integrated ATR technology regulates the output of the MH10S according to the working condition and ambient environment to maintain the optimal performance.
Maintenance
report this adEvery 6 months, threads should be wiped with a clean cloth followed by a thin coating of silicon-based lubricant.
References
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