Comparison Console
Nitecore NU25 UL vs Nitecore NU31
EDC Flashlights comparison. Compare price, weight, specifications, materials, and real-world use case.
Command Brief
Recommended read
Nitecore NU25 UL stands out as the lightest option for weight, with about a 53% gap from the closest alternative. Nitecore NU25 UL stands out as the cheapest option for retail price, with about a 7% gap from the closest alternative. Nitecore NU31 stands out as the highest output option for max lumens, with about a 38% gap from the closest alternative.
Decision Signals
What stands out
Nitecore NU25 UL stands out as the cheapest option for retail price, with about a 7% gap from the closest alternative.
Nitecore NU31 stands out as the most expensive option for retail price, with about a 8% gap from the closest alternative.
Nitecore NU25 UL stands out as the lightest option for weight, with about a 53% gap from the closest alternative.
Nitecore NU31 stands out as the heaviest option for weight, with about a 112% gap from the closest alternative.
Nitecore NU25 UL stands out as the lowest output option for max lumens, with about a 27% gap from the closest alternative.
Nitecore NU31 stands out as the highest output option for max lumens, with about a 38% gap from the closest alternative.
Nitecore NU25 UL stands out as the shortest runtime option for max runtime, with about a 69% gap from the closest alternative.
Nitecore NU31 stands out as the longest runtime option for max runtime, with about a 227% gap from the closest alternative.
Specification Profile
Relative dimensions at a glance
Each axis is normalized against the largest raw value among the products in this comparison. Farther outward means a larger value, not necessarily a better result. Axes with an unverified value are omitted.
Price & carry
Retail price
US$37Cheapest
US$39.95Most expensive
Weight
45 g (1.59 oz)Lightest
95.5 g (3.37 oz)Heaviest
Length
60.1 mm (2.37 in)Shortest
62.3 mm (2.45 in)Longest
Output
Max lumens
400 lmLowest output
550 lmHighest output
Max candela
1029 cdLowest candela
5800 cdHighest candela
Beam distance
64 m (210 ft)Lowest
145 m (476 ft)Highest
Max runtime
2700 minShortest runtime
8820 minLongest runtime
Power & durability
Battery type
Built-in 650mAh Li-ion
Built-in 1800mAh Li-ion battery
Charging type
USB-C (~1.5 hours)
USB-C charging port (5V
1A)
Rechargeable
Yes
Yes
IP rating
IP66
IP66
Impact resistance
1 m (3 ft)
1 m (3 ft)
Material
ABS plastic
Aluminum alloy front housing with durable PC material body
Use case profile
Best for
Ultralight hikingBackpackingTrail runningAlpine climbingNighttime outdoor activities
Outdoor activitiesCampingHikingNight trekkingSkywatching
Common praise
Exceptional lightweight at 45g with good outputVersatile dual-beam (spot and flood) optionsAccurate and long runtimes especially ultralow modeFast USB-C charging (~1.5 hours)Comfortable and secure lightweight strapIP66 weatherproofing for rugged outdoor useClear battery level indicators
Lightweight and compact at 95.5gVersatile lighting modes including white, red, and high CRI auxiliary white lightLong battery runtime up to 147 hoursGood waterproof rating (IP66) and 1 meter impact resistanceUSB-C fast charging with short recharge timeSimple dual-button interface for easy operationReflective headband for safety
Common complaints
Red light mode is too bright and lacks dimming optionsNon-replaceable built-in battery limits long-term maintenanceUser interface is complex and requires reading the manualShock cord strap may not suit users preferring traditional padded bandsBattery capacity modest for extended multi-week trips
Charging time varies between 1.5 to 3 hours depending on sourceSlight green tint on white LED reportedCannot replace internal rechargeable battery
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