NU20 CRI - Flashlight Nitecore - Free user manual and instructions

Product Type	Headlamp / Flashlight
Brand	Nitecore
Model	NU20 CRI
LED	Nichia 219B, CRI ≥ 90
Dimensions	2.18" × 1.29" × 0.82" (with bracket)
Weight	1.66 oz (with battery and bracket)
Power Source	Built-in rechargeable Li-ion battery, 3.7V 600mAh
Charging	Micro-USB, full charge in approx. 2 hours
Brightness Levels	Ultralow (1 lumen), Mid (30 lumens), High (170 lumens), Turbo (270 lumens)
Special Modes	SOS, Location Beacon
Max Runtime	Up to 100 hours on Ultralow
Beam Distance	69 m
Peak Beam Intensity	1,200 cd
Impact Resistance	1.5 m
Waterproof Rating	IPX7, submersible to 1 m
Switch Guard	Yes, prevents accidental activation
Adjustable Angle	52°
Reflector	Textured
Housing Material	Durable PC (polycarbonate)
Patents	Built-in power indicator (Patent ZL201220057767.4)
Warranty	12 months free repair, limited thereafter

Frequently Asked Questions - NU20 CRI Nitecore

How do I turn on the Nitecore NU20 CRI headlamp?

To turn on, slide out the switch from the guard and press the switch. The light will turn on. Press again after 3 seconds to turn off.

How do I adjust brightness levels?

Press the switch repeatedly within 3 seconds of turning on to cycle through Ultralow → Mid → High → Off. For Turbo, press and hold the switch for more than 1 second.

How do I activate SOS or Location Beacon mode?

With the light off, hold the switch for over 3 seconds to enter SOS. Press the switch again within 3 seconds to switch to Location Beacon. To exit, press the switch once more or wait 3 seconds then press.

How do I check the battery level?

With the light off, hold the switch for 1 second and release. The power indicator blinks: 3 blinks (≥50% battery), 2 blinks (<50%), 1 blink (<10%).

How long does it take to fully charge?

A full charge via micro-USB takes approximately 2 hours. The charging indicator is red while charging and turns green when complete.

What is the maximum runtime of the NU20 CRI?

On Ultralow mode (1 lumen), runtime is up to 100 hours. Turbo mode runs for 30 minutes before stepping down.

Is the NU20 CRI waterproof?

Yes, it has an IPX7 rating and can be submerged in up to 1 meter of water for 30 minutes.

What is the CRI value of this flashlight?

The NU20 CRI uses a Nichia 219B LED with a Color Rendering Index (CRI) of 90 or higher, providing accurate color reproduction.

What are the dimensions and weight?

Dimensions: 2.18” × 1.29” × 0.82” (with bracket). Weight: 1.66 oz (including battery and bracket).

What is covered under warranty?

Nitecore warrants the product for 12 months from purchase for defects. After 12 months, limited warranty covers labor and maintenance but not accessories or parts. Warranty void if modified or damaged by improper use.

USER MANUAL NU20 CRI Nitecore

The All-Round Flashlight Expert

Features

• Highly portable headlamp
- Multiple colour temperature options available
• NU20: Fitted with a CREE XP-G2 S3 LED
- NU20 CRI: Fitted with a Nichia 219B LED, CRI≥90
• Built-in Li-ion battery provides runtime up to 100 hours
- Onboard USB charging circuit
- Single switch user interface design offers easy one-handed operation
• Built-in power indicator (Patent No. ZL201220057767.4)
• 4 brightness level and 2 special modes available
- Unique switch guard to prevent accidental activation
- Textured reflector
- 52^ adjustable illumination angle
• Made from durable PC materials
• Lightweight and compact dimensions
- Impact resistant to 1.5 metre

Dimensions

Size: 2.18"×1.29"×0.82"(with bracket)

Weight: 1.66oz(with battery and bracket)

Accessories

USB cord

Output & Runtime

NU20

FL 1 STANDARD	TURBO	HIGH	MID	ULTRALOW
	360LUMENS	220LUMENS	40LUMENS	1LUMEN
	*30min	6h	7h45min	100h
	80m(Beam Distance)
	1,600cd(Peak Beam Intensity)
	1.5m(Impact Resistant)
	IPX7, 1m(Waterproof AND Submersible)

NU20 CRI

FL1 STANDARD	TURBO	HIGH	MID	ULTRALOW
	270LUMENS	170LUMENS	30LUMENS	1LUMEN
	*30min	6_h	7_h 45min	100_h
	69m (Beam Distance)
	1,200cd (Peak Beam Intensity)
	1.5m (Impact Resistant)
	IPX7, 1m (Waterproof AND Submersible)

NOTICE: Stated data has been measured in accordance with the international flashlight testing standards ANSI/NEMA FL1 using an integrated and fully charged 3.7V 600mAh rechargeable Li-ion battery under laboratory conditions. End-user results may vary due to individual usage habits and environmental conditions.

*Runtime for turbo mode is calculated based on theoretical arithmetic.

Operating Instructions ON/OFF

Draw out the NU20/NU20 CRI to expose the switch from the switch guard as illustrated in the diagram below, press the switch to turn the light on, pressing the switch again after 3 second to turn the light off.

Note: Pressing the switch again within 3 second from when the light is turned on will switch output to the next available brightness.

Brightness Adjustment

Press the switch repeatedly within 3 second from the initial activation will switch output from ultralow-mid-high-off. Pressing the switch again after 3 second from initial activation turns the light off.

Access to Turbo

With the light turned on, hold down the switch for more than 1 second to enter turbo mode (360 lumens for NU20 and 270 lumens for NU20 CRI).

Note: The turbo mode will run for 30 second before stepping down to the next available output to prevent overheating.

NU20/NU20 CRI

User Manual

Special Modes (SOS/Location Beacon)

With the light turned off, hold down the switch for over 3 second to enter SOS, pressing the switch again within a 3 second interval to switch to location beacon. To exit special mode, press the switch in location beacon mode, alternatively, cease any operation for 3 second then press the switch again.

Power Tips

With the light turned off, hold down the switch for 1 second, the power indicator will blink to indicate remaining battery power upon the release of the switch: 3 blinks represent battery power above 50%, 2 blinks represent battery power below 50%, 1 blink represents battery power below 10%.

Note: Recharge the product when output appears to be dim and/or unresponsive.

Recharging

1. This product is USB rechargeable. Raise the micro-USB port cover to expose the charging port, connect the port to a power supply with a USB cord to initiate the charging process. Fully charges the battery take approximately 2 hours.

2. Charging Tip: A red light under the switch will be lit to indicate charging in progress, and it will turn green upon charging completion.

Warranty Details

All NITECORE products are warranted for quality. Any defective /malfunctioning NITECORE Tube can be repaired free of charge for a period of 12 months from the date of purchase. Beyond 12 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 either or both 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.

For the latest information on NITECORE® products and services, please contact a local NITECORE® distributor or send an email to [e-mail].

※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.

SYSMAX ind.

SYSMAX Industry Co., Ltd.

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FAX: [phone]

E-mail: [e-mail]

Web: www.nitecore.com

Address: Rm1401-03, Glorious Tower, 850 East Dongfeng Road, Guangzhou, China 510600

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