Olight Seeker 4 vs Olight Seeker Ultra size comparison
The Olight Seeker Ultra is 4 mm (0.16 in) longer than the Olight Seeker 4, with about the same max diameter/width. It is 15 g heavier (with battery).
The Olight Seeker Ultra is 4 mm (0.16 in) longer than the Olight Seeker 4, with about the same max diameter/width. It is 15 g heavier (with battery).
Dimensions
| Olight Seeker 4 Check price ↗ | Olight Seeker Ultra Check price ↗ | |
| Length | 134 mm (5.28 in) | 138 mm (5.43 in)+4 mm |
| Head / width | 35 mm (1.38 in) | 35 mm (1.38 in)same |
| Body | 28 mm (1.10 in) | 28 mm (1.10 in)same |
| Weight | 205 g with battery | 220 g with battery+15 g |
| Battery | 21700 | 21700 |
| Max output | 3,100 lm | 4,800 lm |
| Throw | — | 265 m |
| Type | EDC not on olight.com (US) | EDC |
| Price | not verified yet | $169.99 at olight.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 | olight.com sourced Body diameter and throw from Battery Junction |
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Seeker 4 vs Seeker Ultra: how they differ
Size and weight
The Olight Seeker 4 is the shorter light: 134 mm (5.28 in) against 138 mm (5.43 in), a difference of 4 mm (3%). At their widest points they are about the same (35 vs 35 mm). The Olight Seeker 4 is 15 g lighter (205 g vs 220 g, with battery).
Brightness and throw
The Olight Seeker Ultra is rated brighter: 4,800 lm maximum vs 3,100 lm for the Olight Seeker 4, 55% more.
Battery
Both run on a removable 21700 battery, so spare cells work in either light.
Type
Both are EDC lights in our catalog with a tube body.
Which should you buy?
Choose the Olight Seeker 4 if you want a shorter light (4 mm shorter) and less weight (15 g lighter). Choose the Olight Seeker Ultra if you want more output (4,800 lm vs 3,100 lm). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Olight Seeker 4 Check price ↗ Olight Seeker Ultra
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Seeker 4 vs Seeker Ultra FAQ
Which is smaller, the Olight Seeker 4 or the Olight Seeker Ultra?
The Olight Seeker 4 is the shorter light: 134 mm (5.28 in) against 138 mm (5.43 in), a difference of 4 mm (3%). At their widest points they are about the same (35 vs 35 mm). The Olight Seeker 4 is 15 g lighter (205 g vs 220 g, with battery).
Which is brighter, the Olight Seeker 4 or the Olight Seeker Ultra?
The Olight Seeker Ultra is rated brighter: 4,800 lm maximum vs 3,100 lm for the Olight Seeker 4, 55% more.
Do the Olight Seeker 4 and Olight Seeker Ultra use the same battery?
Both run on a removable 21700 battery, so spare cells work in either light.
Compare Olight Seeker 4 with similar lights
Compare Olight Seeker Ultra with similar lights
More
Sources
- Olight Seeker 4: specs from manufacturer published specs as listed by batteryjunction.com. No verified price yet.
- Olight Seeker Ultra: specs from Olight product page (manufacturer). Price $169.99 from olight.com, checked Nov 4, 2026; prices change often.
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