Fenix HM65R vs ThruNite TH20 Pro size comparison
The ThruNite TH20 Pro is 0.5 mm (0.02 in) shorter than the Fenix HM65R, and 18 mm narrower at its widest point. Weights are published on different bases (listed vs without battery), so compare them with care.
The ThruNite TH20 Pro is 0.5 mm (0.02 in) shorter than the Fenix HM65R, and 18 mm narrower at its widest point. Weights are published on different bases (listed vs without battery), so compare them with care.
Dimensions
| Fenix HM65R Check price ↗ | ThruNite TH20 Pro Check price ↗ | |
| Length | 80.5 mm (3.17 in) | 80 mm (3.15 in)−0.5 mm |
| Head / width | 40 mm (1.57 in) | 22 mm (0.87 in)−18 mm |
| Body | — | 20 mm (0.79 in) |
| Thickness | 55 mm (2.17 in) | — |
| Weight | 97 g without battery | 58 g listed |
| Battery | 18650 / 2x CR123A | 14500 |
| Max output | 1,400 lm | 1,010 lm |
| Throw | 163 m | 141 m |
| Type | Headlamp / right-angle | Headlamp / right-angle |
| Price | $89.95 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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HM65R vs TH20 Pro: how they differ
Size and weight
The ThruNite TH20 Pro is the shorter light: 80 mm (3.15 in) against 80.5 mm (3.17 in), a difference of 0.5 mm (1%). At its widest point the ThruNite TH20 Pro is 18 mm slimmer (22 vs 40 mm). Weights are published on different bases (Fenix HM65R: 97 g without battery; ThruNite TH20 Pro: 58 g listed), so they are not directly comparable.
Brightness and throw
The Fenix HM65R is rated brighter: 1,400 lm maximum vs 1,010 lm for the ThruNite TH20 Pro, 39% more. For beam distance the Fenix HM65R reaches further: 163 m vs 141 m rated throw (16% more).
Battery
The Fenix HM65R runs on removable 18650 / 2x CR123A batteries; the ThruNite TH20 Pro runs on a removable 14500 battery. For scale, a 18650 cell is about 18 × 65 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 HM65R if you want more output (1,400 lm vs 1,010 lm) and longer throw (163 m vs 141 m). Choose the ThruNite TH20 Pro if you want a slimmer profile (18 mm narrower). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix HM65R Check price ↗ ThruNite TH20 Pro
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
HM65R vs TH20 Pro FAQ
Which is smaller, the Fenix HM65R or the ThruNite TH20 Pro?
The ThruNite TH20 Pro is the shorter light: 80 mm (3.15 in) against 80.5 mm (3.17 in), a difference of 0.5 mm (1%). At its widest point the ThruNite TH20 Pro is 18 mm slimmer (22 vs 40 mm). Weights are published on different bases (Fenix HM65R: 97 g without battery; ThruNite TH20 Pro: 58 g listed), so they are not directly comparable.
Which is brighter, the Fenix HM65R or the ThruNite TH20 Pro?
The Fenix HM65R is rated brighter: 1,400 lm maximum vs 1,010 lm for the ThruNite TH20 Pro, 39% more. For beam distance the Fenix HM65R reaches further: 163 m vs 141 m rated throw (16% more).
Do the Fenix HM65R and ThruNite TH20 Pro use the same battery?
The Fenix HM65R runs on removable 18650 / 2x CR123A batteries; the ThruNite TH20 Pro runs on a removable 14500 battery. For scale, a 18650 cell is about 18 × 65 mm and a 14500 about 14 × 50 mm (nominal).
Compare Fenix HM65R with similar lights
Compare ThruNite TH20 Pro with similar lights
More
Sources
- Fenix HM65R: specs from Fenix product page (manufacturer). Price $89.95 from fenixlighting.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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