Olight Seeker Ultra vs RovyVon S3 Pro size comparison
The RovyVon S3 Pro is 19 mm (0.75 in) shorter than the Olight Seeker Ultra, 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 Olight Seeker Ultra, 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 Ultra 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 | 28 mm (1.10 in) | 29 mm (1.14 in)+1 mm |
| Weight | 220 g with battery | 150 g listed |
| Battery | 21700 | 18650 |
| Max output | 4,800 lm | 2,800 lm |
| Throw | 265 m | 130 m |
| Type | EDC | EDC |
| Price | $169.99 at olight.com, as of Nov 4, 2026 | from $79.95 at batteryjunction.com, as of Nov 4, 2026 |
| Source | olight.com sourced Body diameter and throw from Battery Junction | batteryjunction.com sourced |
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Seeker Ultra 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 (Olight Seeker Ultra: 220 g with battery; RovyVon S3 Pro: 150 g listed), so they are not directly comparable.
Brightness and throw
The Olight Seeker Ultra is rated brighter: 4,800 lm maximum vs 2,800 lm for the RovyVon S3 Pro, 71% more. For beam distance the Olight Seeker Ultra reaches further: 265 m vs 130 m rated throw (104% more).
Battery
The Olight Seeker Ultra 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 Ultra was $169.99 at olight.com and the RovyVon S3 Pro from $79.95 at batteryjunction.com, so the RovyVon S3 Pro cost $90.04 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 Ultra if you want more output (4,800 lm vs 2,800 lm) and longer throw (265 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 ↗ Olight Seeker Ultra 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 Ultra vs S3 Pro FAQ
Which is smaller, the Olight Seeker Ultra 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 (Olight Seeker Ultra: 220 g with battery; RovyVon S3 Pro: 150 g listed), so they are not directly comparable.
Which is brighter, the Olight Seeker Ultra or the RovyVon S3 Pro?
The Olight Seeker Ultra is rated brighter: 4,800 lm maximum vs 2,800 lm for the RovyVon S3 Pro, 71% more. For beam distance the Olight Seeker Ultra reaches further: 265 m vs 130 m rated throw (104% more).
Which is cheaper, the Olight Seeker Ultra or the RovyVon S3 Pro?
When we checked on Nov 4, 2026, the Olight Seeker Ultra was $169.99 at olight.com and the RovyVon S3 Pro from $79.95 at batteryjunction.com, so the RovyVon S3 Pro cost $90.04 less. Prices change often, so check the current price before you buy.
Do the Olight Seeker Ultra and RovyVon S3 Pro use the same battery?
The Olight Seeker Ultra 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 Ultra with similar lights
Compare RovyVon S3 Pro with similar lights
More
Sources
- Olight Seeker Ultra: specs from Olight product page (manufacturer). Price $169.99 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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