Fenix HM50R V2.0 vs ThruNite TH20 Pro size comparison
The ThruNite TH20 Pro is 16 mm (0.63 in) longer than the Fenix HM50R V2.0, and 10 mm narrower at its widest point. Weights are published on different bases (listed vs with battery and headband), so compare them with care.
The ThruNite TH20 Pro is 16 mm (0.63 in) longer than the Fenix HM50R V2.0, and 10 mm narrower at its widest point. Weights are published on different bases (listed vs with battery and headband), so compare them with care.
Dimensions
| Fenix HM50R V2.0 Check price ↗ | ThruNite TH20 Pro Check price ↗ | |
| Length | 64 mm (2.52 in) | 80 mm (3.15 in)+16 mm |
| Head / width | 32 mm (1.26 in) | 22 mm (0.87 in)−10 mm |
| Body | — | 20 mm (0.79 in) |
| Thickness | 36 mm (1.42 in) | — |
| Weight | 78 g with battery and headband | 58 g listed |
| Battery | 16340 | 14500 |
| Max output | 700 lm | 1,010 lm |
| Throw | 115 m | 141 m |
| Type | Headlamp / right-angle | Headlamp / right-angle |
| Price | $59.95 at fenixlighting.com, as of Nov 4, 2026 | not verified yet |
| Source | fenixlighting.com sourced Headlamp unit; front view drawn width x height | batteryjunction.com sourced |
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HM50R V2.0 vs TH20 Pro: how they differ
Size and weight
The Fenix HM50R V2.0 is the shorter light: 64 mm (2.52 in) against 80 mm (3.15 in), a difference of 16 mm (20%). At its widest point the ThruNite TH20 Pro is 10 mm slimmer (22 vs 32 mm). Weights are published on different bases (Fenix HM50R V2.0: 78 g with battery and headband; 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 700 lm for the Fenix HM50R V2.0, 44% more. For beam distance the ThruNite TH20 Pro reaches further: 141 m vs 115 m rated throw (23% more).
Battery
The Fenix HM50R V2.0 runs on a removable 16340 battery; the ThruNite TH20 Pro runs on a removable 14500 battery. For scale, a 16340 cell is about 16 × 34 mm and a 14500 about 14 × 50 mm (nominal).
Type
Both are headlamps / right-angle lights in our catalog.
Which should you buy?
Choose the Fenix HM50R V2.0 if you want a shorter light (16 mm shorter). Choose the ThruNite TH20 Pro if you want a slimmer profile (10 mm narrower), more output (1,010 lm vs 700 lm) and longer throw (141 m vs 115 m). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix HM50R V2.0 Check price ↗ ThruNite TH20 Pro
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
HM50R V2.0 vs TH20 Pro FAQ
Which is smaller, the Fenix HM50R V2.0 or the ThruNite TH20 Pro?
The Fenix HM50R V2.0 is the shorter light: 64 mm (2.52 in) against 80 mm (3.15 in), a difference of 16 mm (20%). At its widest point the ThruNite TH20 Pro is 10 mm slimmer (22 vs 32 mm). Weights are published on different bases (Fenix HM50R V2.0: 78 g with battery and headband; ThruNite TH20 Pro: 58 g listed), so they are not directly comparable.
Which is brighter, the Fenix HM50R V2.0 or the ThruNite TH20 Pro?
The ThruNite TH20 Pro is rated brighter: 1,010 lm maximum vs 700 lm for the Fenix HM50R V2.0, 44% more. For beam distance the ThruNite TH20 Pro reaches further: 141 m vs 115 m rated throw (23% more).
Do the Fenix HM50R V2.0 and ThruNite TH20 Pro use the same battery?
The Fenix HM50R V2.0 runs on a removable 16340 battery; the ThruNite TH20 Pro runs on a removable 14500 battery. For scale, a 16340 cell is about 16 × 34 mm and a 14500 about 14 × 50 mm (nominal).
Compare Fenix HM50R V2.0 with similar lights
Compare ThruNite TH20 Pro with similar lights
More
Sources
- Fenix HM50R V2.0: specs from Fenix product page (manufacturer). Drawing: outline from published specs. Price $59.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
- ThruNite TH20 Pro: specs from manufacturer published specs as listed by batteryjunction.com. Drawing: outline from published specs. No verified price yet.
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