Fenix LD36R vs RovyVon S3 Pro size comparison
The RovyVon S3 Pro is 20.6 mm (0.81 in) shorter than the Fenix LD36R, and 11 mm narrower at its widest point. Weights are published on different bases (listed vs with battery), so compare them with care.
The RovyVon S3 Pro is 20.6 mm (0.81 in) shorter than the Fenix LD36R, and 11 mm narrower at its widest point. Weights are published on different bases (listed vs with battery), so compare them with care.
Dimensions
| Fenix LD36R Check price ↗ | RovyVon S3 Pro Check price ↗ | |
| Length | 139.6 mm (5.50 in) | 119 mm (4.69 in)−20.6 mm |
| Head / width | 40 mm (1.57 in) | 29 mm (1.14 in)−11 mm |
| Body | 26.5 mm (1.04 in) | 29 mm (1.14 in)+2.5 mm |
| Weight | 231 g with battery | 150 g listed |
| Battery | 21700 | 18650 |
| Max output | 3,600 lm | 2,800 lm |
| Throw | 385 m | 130 m |
| Type | EDC | EDC |
| Price | from $114.95 at fenixlighting.com, as of Nov 4, 2026 | from $79.95 at batteryjunction.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced | batteryjunction.com sourced |
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LD36R vs S3 Pro: how they differ
Size and weight
The RovyVon S3 Pro is the shorter light: 119 mm (4.69 in) against 139.6 mm (5.50 in), a difference of 20.6 mm (15%). At its widest point the RovyVon S3 Pro is 11 mm slimmer (29 vs 40 mm). Weights are published on different bases (Fenix LD36R: 231 g with battery; RovyVon S3 Pro: 150 g listed), so they are not directly comparable.
Brightness and throw
The Fenix LD36R is rated brighter: 3,600 lm maximum vs 2,800 lm for the RovyVon S3 Pro, 29% more. For beam distance the Fenix LD36R reaches further: 385 m vs 130 m rated throw (196% more).
Battery
The Fenix LD36R runs on a removable 21700 battery; the RovyVon S3 Pro runs on a removable 18650 battery. For scale, a 21700 cell is about 21 × 70 mm and a 18650 about 18 × 65 mm (nominal).
Price
When we checked on Nov 4, 2026, the Fenix LD36R was from $114.95 at fenixlighting.com and the RovyVon S3 Pro from $79.95 at batteryjunction.com, so the RovyVon S3 Pro cost $35.00 less. Prices change often, so check the current price before you buy.
Type
Both are EDC lights in our catalog with a tube body.
Which should you buy?
Choose the Fenix LD36R if you want more output (3,600 lm vs 2,800 lm) and longer throw (385 m vs 130 m). Choose the RovyVon S3 Pro if you want a shorter light (20.6 mm shorter) and a slimmer profile (11 mm narrower). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix LD36R Check price ↗ RovyVon S3 Pro
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
LD36R vs S3 Pro FAQ
Which is smaller, the Fenix LD36R or the RovyVon S3 Pro?
The RovyVon S3 Pro is the shorter light: 119 mm (4.69 in) against 139.6 mm (5.50 in), a difference of 20.6 mm (15%). At its widest point the RovyVon S3 Pro is 11 mm slimmer (29 vs 40 mm). Weights are published on different bases (Fenix LD36R: 231 g with battery; RovyVon S3 Pro: 150 g listed), so they are not directly comparable.
Which is brighter, the Fenix LD36R or the RovyVon S3 Pro?
The Fenix LD36R is rated brighter: 3,600 lm maximum vs 2,800 lm for the RovyVon S3 Pro, 29% more. For beam distance the Fenix LD36R reaches further: 385 m vs 130 m rated throw (196% more).
Which is cheaper, the Fenix LD36R or the RovyVon S3 Pro?
When we checked on Nov 4, 2026, the Fenix LD36R was from $114.95 at fenixlighting.com and the RovyVon S3 Pro from $79.95 at batteryjunction.com, so the RovyVon S3 Pro cost $35.00 less. Prices change often, so check the current price before you buy.
Do the Fenix LD36R and RovyVon S3 Pro use the same battery?
The Fenix LD36R runs on a removable 21700 battery; the RovyVon S3 Pro runs on a removable 18650 battery. For scale, a 21700 cell is about 21 × 70 mm and a 18650 about 18 × 65 mm (nominal).
Compare Fenix LD36R with similar lights
Compare RovyVon S3 Pro with similar lights
More
Sources
- Fenix LD36R: specs from Fenix product page (manufacturer). Drawing: outline from published specs. Price from $114.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
- RovyVon S3 Pro: specs from manufacturer published specs as listed by batteryjunction.com. Drawing: outline from published specs. Price from $79.95 from batteryjunction.com, checked Nov 4, 2026; prices change often.
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