Nitecore NU25 UL vs ThruNite TH20 Pro size comparison
The ThruNite TH20 Pro is 20 mm (0.79 in) longer than the Nitecore NU25 UL, and 3 mm narrower at its widest point. Weights are published on different bases (listed vs listed), so compare them with care.
The ThruNite TH20 Pro is 20 mm (0.79 in) longer than the Nitecore NU25 UL, and 3 mm narrower at its widest point. Weights are published on different bases (listed vs listed), so compare them with care.
Dimensions
| Nitecore NU25 UL Check price ↗ | ThruNite TH20 Pro Check price ↗ | |
| Length | 60 mm (2.36 in) | 80 mm (3.15 in)+20 mm |
| Head / width | 25 mm (0.98 in) | 22 mm (0.87 in)−3 mm |
| Body | — | 20 mm (0.79 in) |
| Thickness | 37 mm (1.46 in) | — |
| Weight | 56 g listed | 58 g listed |
| Battery | Built-in | 14500 |
| Max output | 400 lm | 1,010 lm |
| Throw | 64 m | 141 m |
| Type | Headlamp / right-angle | Headlamp / right-angle |
| Price | from $36.95 at batteryjunction.com, as of Nov 4, 2026 | not verified yet |
| Source | batteryjunction.com sourced Retailer lists 60 x 37 x 25 mm | batteryjunction.com sourced |
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NU25 UL vs TH20 Pro: how they differ
Size and weight
The Nitecore NU25 UL is the shorter light: 60 mm (2.36 in) against 80 mm (3.15 in), a difference of 20 mm (25%). At its widest point the ThruNite TH20 Pro is 3 mm slimmer (22 vs 25 mm). Weights are published on different bases (Nitecore NU25 UL: 56 g listed; ThruNite TH20 Pro: 58 g listed), so they are not directly comparable.
Brightness and throw
The ThruNite TH20 Pro is rated brighter: 1,010 lm maximum vs 400 lm for the Nitecore NU25 UL, 153% more. For beam distance the ThruNite TH20 Pro reaches further: 141 m vs 64 m rated throw (120% more).
Battery
The Nitecore NU25 UL runs on a built-in rechargeable battery; the ThruNite TH20 Pro runs on a removable 14500 battery. Only the ThruNite TH20 Pro lets you swap in a charged spare.
Type
Both are headlamps / right-angle lights in our catalog.
Which should you buy?
Choose the Nitecore NU25 UL if you want a shorter light (20 mm shorter) and a built-in battery with no separate cell to buy. Choose the ThruNite TH20 Pro if you want a slimmer profile (3 mm narrower), more output (1,010 lm vs 400 lm), longer throw (141 m vs 64 m) and a removable cell you can swap. We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Nitecore NU25 UL Check price ↗ ThruNite TH20 Pro
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
NU25 UL vs TH20 Pro FAQ
Which is smaller, the Nitecore NU25 UL or the ThruNite TH20 Pro?
The Nitecore NU25 UL is the shorter light: 60 mm (2.36 in) against 80 mm (3.15 in), a difference of 20 mm (25%). At its widest point the ThruNite TH20 Pro is 3 mm slimmer (22 vs 25 mm). Weights are published on different bases (Nitecore NU25 UL: 56 g listed; ThruNite TH20 Pro: 58 g listed), so they are not directly comparable.
Which is brighter, the Nitecore NU25 UL or the ThruNite TH20 Pro?
The ThruNite TH20 Pro is rated brighter: 1,010 lm maximum vs 400 lm for the Nitecore NU25 UL, 153% more. For beam distance the ThruNite TH20 Pro reaches further: 141 m vs 64 m rated throw (120% more).
Do the Nitecore NU25 UL and ThruNite TH20 Pro use the same battery?
The Nitecore NU25 UL runs on a built-in rechargeable battery; the ThruNite TH20 Pro runs on a removable 14500 battery. Only the ThruNite TH20 Pro lets you swap in a charged spare.
Compare Nitecore NU25 UL with similar lights
Compare ThruNite TH20 Pro with similar lights
More
Sources
- Nitecore NU25 UL: specs from manufacturer published specs as listed by batteryjunction.com. Price from $36.95 from batteryjunction.com, checked Nov 4, 2026; prices change often.
- ThruNite TH20 Pro: specs from manufacturer published specs as listed by batteryjunction.com. No verified price yet.
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