Exceptional lightweight at 45g with good output
Flashlight Record
Nitecore
Nitecore NU25 UL
The Nitecore NU25 UL is an ultralight, dual-beam USB-C rechargeable headlamp offering 400 lumens output with spot and flood beams, IP66 waterproof rating, and versatile modes for outdoor activities.
Last updated
Weight45 g (1.59 oz)
PriceUS$37
Max lumens400 lm
BatteryBuilt-in 650mah Li-ion
Technical Specs
Specifications
CategoryHeadlamp
Length60.1 mm (2.37 in)
Head diameter25.5 mm (1.00 in)
Body diameter33 mm (1.30 in)
Max lumens400 lm
Max candela1029 cd
Beam distance64 m (210 ft)
Max runtime2700 min
Battery typeBuilt-in 650mah Li-ion
RechargeableYes
Charging typeUsb-c (~1.5 Hours)
IP ratingIP66
Impact resistance1 m (3 ft)
MaterialAbs Plastic
Switch typeTwo-button Rubber Switches
Output Profile
Modes
HighMediumLowUltralowSpotFloodCombinedRed LightStrobeLockout
Carry Profile
Best for
Ultralight HikingBackpackingTrail RunningAlpine ClimbingNighttime Outdoor Activities
Field Signals
Common praise
Versatile dual-beam (spot and flood) options
Accurate and long runtimes especially ultralow mode
Fast USB-C charging (~1.5 hours)
Comfortable and secure lightweight strap
IP66 weatherproofing for rugged outdoor use
Clear battery level indicators
Watchlist
Common complaints
Red light mode is too bright and lacks dimming options
Non-replaceable built-in battery limits long-term maintenance
User interface is complex and requires reading the manual
Shock cord strap may not suit users preferring traditional padded bands
Battery capacity modest for extended multi-week trips
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