Fenix E40R vs RovyVon S3 Pro size comparison
The RovyVon S3 Pro is 19 mm (0.75 in) shorter than the Fenix E40R, and 6 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 19 mm (0.75 in) shorter than the Fenix E40R, and 6 mm narrower at its widest point. Weights are published on different bases (listed vs with battery), so compare them with care.
Dimensions
| Fenix E40R Check price ↗ | RovyVon S3 Pro Check price ↗ | |
| Length | 138 mm (5.43 in) | 119 mm (4.69 in)−19 mm |
| Head / width | 35 mm (1.38 in) | 29 mm (1.14 in)−6 mm |
| Body | 26.4 mm (1.04 in) | 29 mm (1.14 in)+2.6 mm |
| Weight | 220 g with battery | 150 g listed |
| Battery | 21700 | 18650 |
| Max output | 5,000 lm | 2,800 lm |
| Throw | 242 m | 130 m |
| Type | EDC | EDC |
| Price | $109.95 at fenixlighting.com, as of Nov 4, 2026 | from $79.95 at batteryjunction.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced Listed 35 mm wide x 26.4 mm high | batteryjunction.com sourced |
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E40R vs S3 Pro: how they differ
Size and weight
The RovyVon S3 Pro is the shorter light: 119 mm (4.69 in) against 138 mm (5.43 in), a difference of 19 mm (14%). At its widest point the RovyVon S3 Pro is 6 mm slimmer (29 vs 35 mm). Weights are published on different bases (Fenix E40R: 220 g with battery; RovyVon S3 Pro: 150 g listed), so they are not directly comparable.
Brightness and throw
The Fenix E40R is rated brighter: 5,000 lm maximum vs 2,800 lm for the RovyVon S3 Pro, 79% more. For beam distance the Fenix E40R reaches further: 242 m vs 130 m rated throw (86% more).
Battery
The Fenix E40R 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 E40R was $109.95 at fenixlighting.com and the RovyVon S3 Pro from $79.95 at batteryjunction.com, so the RovyVon S3 Pro cost $30.00 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 E40R if you want more output (5,000 lm vs 2,800 lm) and longer throw (242 m vs 130 m). Choose the RovyVon S3 Pro if you want a shorter light (19 mm shorter) and a slimmer profile (6 mm narrower). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix E40R Check price ↗ RovyVon S3 Pro
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
E40R vs S3 Pro FAQ
Which is smaller, the Fenix E40R or the RovyVon S3 Pro?
The RovyVon S3 Pro is the shorter light: 119 mm (4.69 in) against 138 mm (5.43 in), a difference of 19 mm (14%). At its widest point the RovyVon S3 Pro is 6 mm slimmer (29 vs 35 mm). Weights are published on different bases (Fenix E40R: 220 g with battery; RovyVon S3 Pro: 150 g listed), so they are not directly comparable.
Which is brighter, the Fenix E40R or the RovyVon S3 Pro?
The Fenix E40R is rated brighter: 5,000 lm maximum vs 2,800 lm for the RovyVon S3 Pro, 79% more. For beam distance the Fenix E40R reaches further: 242 m vs 130 m rated throw (86% more).
Which is cheaper, the Fenix E40R or the RovyVon S3 Pro?
When we checked on Nov 4, 2026, the Fenix E40R was $109.95 at fenixlighting.com and the RovyVon S3 Pro from $79.95 at batteryjunction.com, so the RovyVon S3 Pro cost $30.00 less. Prices change often, so check the current price before you buy.
Do the Fenix E40R and RovyVon S3 Pro use the same battery?
The Fenix E40R 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 E40R with similar lights
Compare RovyVon S3 Pro with similar lights
More
Sources
- Fenix E40R: specs from Fenix product page (manufacturer). Drawing: outline from published specs. Price $109.95 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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