description Nitecore NU25 UL Overview
The Nitecore NU25 UL is the undisputed king of the ultralight community. Weighing in at a mere 45 grams, it is designed for thru-hikers and weight-conscious backpackers who count every gram. Despite its tiny footprint, it offers a respectable 400 lumens and a dedicated red light mode. The dual-strap design is minimalist and highly breathable, preventing sweat buildup during strenuous climbs.
It charges via USB-C and provides enough light for camp chores and night hiking. If you are building a lightweight kit, this is the only headlamp you should consider.
info Nitecore NU25 UL Specifications
| Weight | 45 grams |
| Battery | Integrated rechargeable Li-ion |
| Runtime | 2-160 hours depending on mode |
| Charging | USB-C |
| Led Type | Dual CREE LEDs (white and red) |
| Dimensions | 55mm x 34mm x 25mm |
| Max Output | 400 lumens |
| Beam Distance | 70-80 meters |
| Water Resistance | IPX6 |
| Impact Resistance | 1 meter |
balance Nitecore NU25 UL Pros & Cons
- 45 grams total weight - one of the lightest headlamps available for ultralight backpacking
- 400 lumens maximum output provides solid visibility for night hiking and camp tasks
- Dedicated red light mode preserves night vision and saves battery life
- Dual-strap system ensures secure fit during running or technical trail movement
- USB rechargeable battery eliminates need for disposable batteries and is convenient
- Multiple lighting modes including SOS and beacon for emergency situations
- Battery life limited to approximately 2-3 hours on maximum 400 lumen setting
- Compact size may feel fragile or less durable compared to heavier alternatives
- Strap material can show wear over extended thru-hike use
- Water resistance rating of IPX6 limits submersion depth and duration
- Non-replaceable battery means the entire unit must be replaced when capacity degrades
help Nitecore NU25 UL FAQ
What is the battery life of the Nitecore NU25 UL on different settings?
The NU25 UL offers approximately 2 hours at 400 lumens, 4.5 hours at 200 lumens, and up to 20 hours on lower settings. Actual runtime varies based on temperature and usage conditions.
Is the Nitecore NU25 UL waterproof?
The headlamp carries an IPX6 rating, meaning it can withstand heavy splashing and rain from any direction, but should not be submerged in water.
How do you charge the Nitecore NU25 UL?
The NU25 UL features an integrated USB-C charging port. A compatible cable is included, and charging typically takes 2-3 hours from empty to full battery.
What is the beam distance of the Nitecore NU25 UL?
The NU25 UL throws a usable beam approximately 70-80 meters on turbo mode, which is sufficient for fast-paced night hiking and trail running.
Can the Nitecore NU25 UL be used with regular batteries?
No, the NU25 UL uses an integrated rechargeable lithium-ion battery that cannot be replaced with standard AA or AAA batteries.
What is Nitecore NU25 UL?
How good is Nitecore NU25 UL?
How much does Nitecore NU25 UL cost?
What are the best alternatives to Nitecore NU25 UL?
What is Nitecore NU25 UL best for?
Thru-hikers, ultralight backpackers, and trail runners who prioritize minimizing pack weight without sacrificing essential headlamp functionality.
How does Nitecore NU25 UL compare to Petzl Bindi?
Is Nitecore NU25 UL worth it in 2026?
What are the key specifications of Nitecore NU25 UL?
- Weight: 45 grams
- Battery: Integrated rechargeable Li-ion
- Runtime: 2-160 hours depending on mode
- Charging: USB-C
- LED Type: Dual CREE LEDs (white and red)
- Dimensions: 55mm x 34mm x 25mm
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