Headlamp Nitecore NU21 Speed Yellow — LED headlamp, 360 lumens, compact rechargeable

The Nitecore NU21 Speed Yellow is a compact rechargeable LED headlamp that delivers up to 360 lumens of output in a lightweight package. Its unibody optical lens produces a uniform, soft beam with a maximum throw of 58 metres, suitable for night running, route finding and general hands-free illumination. Built-in dual red LEDs preserve night vision and provide a low-energy signal mode. The NU21 integrates a 500 mAh lithium-ion battery with USB-C charging, an efficient constant-current circuit for stable light, and an ultra-low standby consumption that maintains readiness for up to 365 days. The housing meets IP66 protection for reliable performance in wet and dusty conditions.

Advantages

The NU21 combines a high maximum output with a compact, lightweight design that is comfortable for extended wear. Multiple brightness levels plus SOS and location beacon modes offer flexible lighting options for different activities. USB-C rechargeable battery and ultra-low standby draw reduce maintenance and ensure long-term readiness. The unibody lens and constant-current regulation provide even illumination and consistent colour temperature across modes.

Suitable for

• Night running and trail running
• Hiking and route finding
• Camping and outdoor leisure
• Everyday hands-free tasks and repairs
• Emergency signalling and low-light navigation

Key specifications

• Maximum output: 360 lumens
• Maximum beam distance: 58 metres
• Battery type: rechargeable lithium-ion, 500 mAh capacity
• Maximum runtime: up to 37 hours (dependent on mode)
• Charging interface: USB-C
• Ingress protection: IP66
• Special modes: Location beacon, SOS
• Weight (unit net): 44 g
• Colour: Yellow

How to use

Fit the NU21 on the adjustable headband and position the lamp for a comfortable, stable fit. Press the control button to cycle through brightness levels and access the special modes (Location Beacon and SOS) as required. Use the dual red-LED mode when preserving night vision or signalling is needed. Recharge the internal battery via the USB-C port; charging indicators will show battery status. Observe recommended charging intervals and fully charge before extended use to ensure maximum runtime.

Usage recommendations

For night running, select a mid to high white output for route visibility while using the red LEDs for brief rest stops to keep night vision. Keep the USB-C port covered when not charging to maintain the IP66 protection. Avoid prolonged continuous operation at maximum output to prevent overheating and preserve battery life; use lower modes when full brightness is not required.