Olight Seeker 3 vs RovyVon S3 Pro size comparison
The RovyVon S3 Pro is 9 mm (0.35 in) shorter than the Olight Seeker 3, 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 9 mm (0.35 in) shorter than the Olight Seeker 3, 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 3 Check price ↗ | RovyVon S3 Pro Check price ↗ | |
| Length | 128 mm (5.04 in) | 119 mm (4.69 in)−9 mm |
| Head / width | 35 mm (1.38 in) | 29 mm (1.14 in)−6 mm |
| Body | 27.5 mm (1.08 in) | 29 mm (1.14 in)+1.5 mm |
| Weight | 184 g with battery | 150 g listed |
| Battery | 21700 | 18650 |
| Max output | 3,500 lm | 2,800 lm |
| Throw | 220 m | 130 m |
| Type | EDC | EDC |
| Price | $119.95 at olight.com, as of Nov 4, 2026 | from $79.95 at batteryjunction.com, as of Nov 4, 2026 |
| Source | olight.com sourced | batteryjunction.com sourced |
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Seeker 3 vs S3 Pro: how they differ
Size and weight
The RovyVon S3 Pro is the shorter light: 119 mm (4.69 in) against 128 mm (5.04 in), a difference of 9 mm (7%). At its widest point the RovyVon S3 Pro is 6 mm slimmer (29 vs 35 mm). Weights are published on different bases (Olight Seeker 3: 184 g with battery; RovyVon S3 Pro: 150 g listed), so they are not directly comparable.
Brightness and throw
The Olight Seeker 3 is rated brighter: 3,500 lm maximum vs 2,800 lm for the RovyVon S3 Pro, 25% more. For beam distance the Olight Seeker 3 reaches further: 220 m vs 130 m rated throw (69% more).
Battery
The Olight Seeker 3 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 Olight Seeker 3 was $119.95 at olight.com and the RovyVon S3 Pro from $79.95 at batteryjunction.com, so the RovyVon S3 Pro cost $40.00 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 Olight Seeker 3 if you want more output (3,500 lm vs 2,800 lm) and longer throw (220 m vs 130 m). Choose the RovyVon S3 Pro if you want a shorter light (9 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 3 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 3 vs S3 Pro FAQ
Which is smaller, the Olight Seeker 3 or the RovyVon S3 Pro?
The RovyVon S3 Pro is the shorter light: 119 mm (4.69 in) against 128 mm (5.04 in), a difference of 9 mm (7%). At its widest point the RovyVon S3 Pro is 6 mm slimmer (29 vs 35 mm). Weights are published on different bases (Olight Seeker 3: 184 g with battery; RovyVon S3 Pro: 150 g listed), so they are not directly comparable.
Which is brighter, the Olight Seeker 3 or the RovyVon S3 Pro?
The Olight Seeker 3 is rated brighter: 3,500 lm maximum vs 2,800 lm for the RovyVon S3 Pro, 25% more. For beam distance the Olight Seeker 3 reaches further: 220 m vs 130 m rated throw (69% more).
Which is cheaper, the Olight Seeker 3 or the RovyVon S3 Pro?
When we checked on Nov 4, 2026, the Olight Seeker 3 was $119.95 at olight.com and the RovyVon S3 Pro from $79.95 at batteryjunction.com, so the RovyVon S3 Pro cost $40.00 less. Prices change often, so check the current price before you buy.
Do the Olight Seeker 3 and RovyVon S3 Pro use the same battery?
The Olight Seeker 3 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 3 with similar lights
Compare RovyVon S3 Pro with similar lights
More
Sources
- Olight Seeker 3: specs from Olight product page (manufacturer). Price $119.95 from olight.com, checked Nov 4, 2026; prices change often.
- 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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