Olight Seeker 4 vs RovyVon S3 Pro size comparison
The RovyVon S3 Pro is 15 mm (0.59 in) shorter than the Olight Seeker 4, 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 15 mm (0.59 in) shorter than the Olight Seeker 4, and 6 mm narrower at its widest point. Weights are published on different bases (listed vs with battery), so compare them with care.
Dimensions
| Olight Seeker 4 Check price ↗ | RovyVon S3 Pro Check price ↗ | |
| Length | 134 mm (5.28 in) | 119 mm (4.69 in)−15 mm |
| Head / width | 35 mm (1.38 in) | 29 mm (1.14 in)−6 mm |
| Body | 28 mm (1.10 in) | 29 mm (1.14 in)+1 mm |
| Weight | 205 g with battery | 150 g listed |
| Battery | 21700 | 18650 |
| Max output | 3,100 lm | 2,800 lm |
| Throw | — | 130 m |
| Type | EDC not on olight.com (US) | EDC |
| Price | not verified yet | from $79.95 at batteryjunction.com, as of Nov 4, 2026 |
| Source | batteryjunction.com sourced Retailer lists 400 m throw, which conflicts with Olight figures for the series; throw omitted | batteryjunction.com sourced |
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Seeker 4 vs S3 Pro: how they differ
Size and weight
The RovyVon S3 Pro is the shorter light: 119 mm (4.69 in) against 134 mm (5.28 in), a difference of 15 mm (11%). At its widest point the RovyVon S3 Pro is 6 mm slimmer (29 vs 35 mm). Weights are published on different bases (Olight Seeker 4: 205 g with battery; RovyVon S3 Pro: 150 g listed), so they are not directly comparable.
Brightness and throw
The Olight Seeker 4 is rated brighter: 3,100 lm maximum vs 2,800 lm for the RovyVon S3 Pro, 11% more.
Battery
The Olight Seeker 4 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).
Type
Both are EDC lights in our catalog with a tube body.
Which should you buy?
Choose the Olight Seeker 4 if you want more output (3,100 lm vs 2,800 lm). Choose the RovyVon S3 Pro if you want a shorter light (15 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 ↗ Olight Seeker 4 Check price ↗ RovyVon S3 Pro
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
Seeker 4 vs S3 Pro FAQ
Which is smaller, the Olight Seeker 4 or the RovyVon S3 Pro?
The RovyVon S3 Pro is the shorter light: 119 mm (4.69 in) against 134 mm (5.28 in), a difference of 15 mm (11%). At its widest point the RovyVon S3 Pro is 6 mm slimmer (29 vs 35 mm). Weights are published on different bases (Olight Seeker 4: 205 g with battery; RovyVon S3 Pro: 150 g listed), so they are not directly comparable.
Which is brighter, the Olight Seeker 4 or the RovyVon S3 Pro?
The Olight Seeker 4 is rated brighter: 3,100 lm maximum vs 2,800 lm for the RovyVon S3 Pro, 11% more.
Do the Olight Seeker 4 and RovyVon S3 Pro use the same battery?
The Olight Seeker 4 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 Olight Seeker 4 with similar lights
Compare RovyVon S3 Pro with similar lights
More
Sources
- Olight Seeker 4: specs from manufacturer published specs as listed by batteryjunction.com. No verified price yet.
- RovyVon S3 Pro: specs from manufacturer published specs as listed by batteryjunction.com. Price from $79.95 from batteryjunction.com, checked Nov 4, 2026; prices change often.
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