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Choose Nitecore NU25 MCT when low weight and selectable white-light colour temperatures are your priorities. Choose NU33 when its larger battery and separate high-colour-rendering white light better suit your routine. Both charge by USB-C, but their lighting arrangements and carried weights are noticeably different.
Table of Contents
Compare the specified versions
This guide uses the standard-headband NU25 MCT and NU33. It does not use the older NU25, older NU25 UL or the lighter-band NU25 MCT UL.
| Feature | NU25 MCT | NU33 |
|---|---|---|
| Weight with bracket and headband | 50g | 95.5g |
| Built-in battery | 700mAh | 2,000mAh |
| Maximum white output | 400 lumens | 700 lumens |
| Charging | USB-C | USB-C |
| Additional lighting | Three white colour temperatures and red | High-CRI auxiliary white and red |
Choose the lighting features you will use
NU25 MCT lets you choose warm, neutral or cool white light. Try the settings on the objects and paths you expect to illuminate. Personal preference and the beam pattern matter; a warmer colour should not be treated as a guarantee of safe visibility in difficult weather.
NU33’s auxiliary high-CRI white light is designed to render colours more naturally for close work. That may be useful when sorting equipment or reading at camp. It is a different feature from simply choosing a warm colour temperature.
Compare runtime at a meaningful setting
The larger NU33 battery does not automatically tell you how long it will last in your chosen mode. Higher output uses energy differently, and lamps can reduce brightness during operation.
Nitecore’s NU33 documentation includes a runtime graph. Check the behaviour of the setting you intend to use rather than combining the 700-lumen maximum with its longest low-mode duration. Apply the same rule to NU25 MCT. A maximum-runtime headline is not a promise of constant maximum brightness.
Try the fit and controls
Nearly doubling the carried lamp weight may be unimportant for some campers and noticeable to others. Wear it with your usual hat or hood, move your head and check whether the angle remains stable.
Practise the buttons, red-light selection and lockout before the trip. Keep the charging lead accessible and the port dry as instructed. For night walking where losing light would matter, plan suitable independent backup lighting rather than relying only on a power bank.
Which should you choose?
Compare the NU25 MCT on Amazon UK and NU33 on Amazon UK. Check the model suffix and included headband.
Choose MCT for a lighter setup and its colour-temperature options. Choose NU33 when the larger battery and auxiliary lighting are useful enough to carry. Let your actual evening routine determine which features earn their place.
Continue with our camping headlamp guide.
Reviewed 10 September 2026. This guide is based on published specifications and guidance.