Nitecore NU25 400 Lumen Ultra Lightweight Headlamp - Compact Power

Our review of the Nitecore NU25 UL finds it to be a smart choice for ultralight backpackers, trail runners and campers who need a compact, rechargeable headlamp with a bright, flexible beam. The single biggest reason to buy is its combination of a 400 lumen max output with an unusually lightweight design that replaces a bulky headband with paracord, making it easy to stow in a pocket or small organizer while still delivering reliable brightness and long battery life for multi-day trips.

Key Features

• 400 lumen peak: Provides a powerful spotlight useful for trail running and navigating at night without feeling overbuilt for daypack use.
• Ultra lightweight design: Paracord straps and a compact housing reduce carried weight so it tucks into a pocket or the included Lumentac organizer for backpacking.
• Triple output versatility: Offers spotlight, floodlight and a combined mode plus dual red LEDs for night vision and close-up tasks without ruining night adaptation.
• USB-C rechargeable: Recharges from common USB power sources quickly and conveniently for travel and overnight trips.
• IP66 water resistant: Tough polycarbonate unibody construction sheds splashes and holds up to outdoor use in adverse weather.
• Simple control: Two-button layout and a compact form factor make it easy to change modes even while moving.

Who It's For

The NU25 UL suits ultralight backpackers, bikepackers and trail runners who prioritize weight savings and pocketability but still need a reliable 400 lumen light. Its paracord straps and small footprint make it ideal for multi-day trips where every ounce and every cubic inch of space matters.

Those who want extreme runtime for long stationary tasks or an integrated headband for heavy-duty work lighting should look elsewhere; there are larger headlamps with longer runtimes or more robust headband systems better suited to prolonged hands-free use in a work setting.

Pros & Cons

Pros

• Very lightweight and compact, making it easy to carry in a pocket or organizer.
• Bright 400 lumen output with both spotlight and floodlight options for versatile use.
• USB-C rechargeability and fast charge convenience for travel and daily use.
• Includes red LEDs which preserve night vision and aid close work.

Cons

• Paracord strap system favors weight savings over the comfort or adjustability of a full fabric headband for extended wear.
• Smaller unit means less thermal mass; on highest output runtime is limited compared with larger headlamps.

Specifications

Our Verdict

The Nitecore NU25 UL is a high-value, ultralight headlamp that delivers a useful 400 lumen output, flexible beam options and fast USB-C charging in a tiny package. Its paracord strap and compact build make it especially good for minimalist backpackers and runners who need dependable brightness without bulk; buy it if weight and packability are priorities.

Frequently Asked Questions

How is it charged?
The headlamp charges via the included USB-C cable from any standard USB power source.

Does it have a red light?
Yes, the NU25 UL includes dual red LEDs for preserving night vision and close-up tasks.

Is it weather resistant?
Yes, the housing is rated IP66 for protection against heavy splashes and outdoor conditions.