This is an editorial review based on manufacturer specifications, the published manual and comparison research. It is not a hands-on product test.
The NITECORE NU25 MCT UL makes a focused ultralight proposition: 47 g with headband and bracket, a built-in 700 mAh battery, USB-C charging and three selectable white colour temperatures. For an overnight fastpack or a backup light, its weight is compelling; for an all-night technical race, the fixed battery and runtime ceiling deserve more attention than the headline 400 lumens.
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Key specifications
| Weight | 47 g with bracket and headband |
|---|---|
| Maximum output | 400 lumens |
| Battery | Built-in 700 mAh Li-ion; USB-C charging |
| Claimed maximum runtime | 45 hours at 6 lumens |
| High / Mid / Low | 400 lm / 2 h 40 min; 200 lm / 5 h; 60 lm / 13 h |
| Protection | IP66; 1 m impact resistance |
What makes the MCT version different
The MCT LEDs offer warm 3000 K, neutral 4500 K and cool 6500 K white light, plus red light. That gives a user more choice than a single-colour ultralight lamp, but it does not prove that any one colour temperature is better for every trail. Treat it as a visibility preference to test in fog, rain and map checks—not as a performance claim.
Runtime is the real selection filter
NITECORE lists 2 h 40 min at 400 lumens, 5 h at 200 lumens and 13 h at 60 lumens under its stated test conditions. Cold temperatures, route-finding and higher settings can change the practical picture. Because the 700 mAh battery is built in, a power bank can recharge it at a stop but does not make it instantly swappable. For a 100-mile race, build the lighting plan around the required night hours and race rules, then add a reserve—not around its lightest possible carry weight.
Advantages and limitations
- Advantages: very low listed weight, USB-C, IP66 and two differentiated buttons are attractive for fastpacking and short-to-medium night use.
- Limitations: no replaceable battery; high output is not an all-night setting; regional availability, price and warranty must be verified before purchase.
Comparison: NU25 MCT UL vs. Distance LT 1100
| NU25 MCT UL | Distance LT 1100 | |
|---|---|---|
| Listed weight | 47 g | 108 g |
| Battery approach | built-in 700 mAh | swappable 2,200 mAh pack |
| Best fit | minimum carry weight / backup role | longer night plan with battery swaps |
Read our Distance LT 1100 editorial review for the heavier-duty alternative.
Who should buy it?
Consider it if you want a light, USB-C rechargeable lamp for early starts, camp tasks, short night runs or as a carefully planned backup. Choose a model with replaceable power if you need to sustain high output over a long, technical night without a charging stop.
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