Emisar D1K vs Olight Seeker Ultra size comparison
The Olight Seeker Ultra is 24 mm (0.94 in) longer than the Emisar D1K, with about the same max diameter/width. Weights are published on different bases (with battery vs without battery), so compare them with care.
The Olight Seeker Ultra is 24 mm (0.94 in) longer than the Emisar D1K, with about the same max diameter/width. Weights are published on different bases (with battery vs without battery), so compare them with care.
Dimensions
| Emisar D1K Check price ↗ | Olight Seeker Ultra Check price ↗ | |
| Length | 114 mm (4.49 in) | 138 mm (5.43 in)+24 mm |
| Head / width | 35 mm (1.38 in) | 35 mm (1.38 in)same |
| Body | 26.5 mm (1.04 in) | 28 mm (1.10 in)+1.5 mm |
| Weight | 89 g without battery | 220 g with battery |
| Battery | 21700 | 21700 |
| Max output | 1,200 lm | 4,800 lm |
| Throw | — | 265 m |
| Type | EDC | EDC |
| Price | $39.95 at intl-outdoor.com, as of Nov 4, 2026 | $169.99 at olight.com, as of Nov 4, 2026 |
| Source | intl-outdoor.com sourced Pocket thrower; lumens for SFT-25 | olight.com sourced Body diameter and throw from Battery Junction |
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D1K vs Seeker Ultra: how they differ
Size and weight
The Emisar D1K is the shorter light: 114 mm (4.49 in) against 138 mm (5.43 in), a difference of 24 mm (17%). At their widest points they are about the same (35 vs 35 mm). Weights are published on different bases (Emisar D1K: 89 g without battery; Olight Seeker Ultra: 220 g with battery), so they are not directly comparable.
Brightness and throw
The Olight Seeker Ultra is rated brighter: 4,800 lm maximum vs 1,200 lm for the Emisar D1K, 300% more.
Battery
Both run on a removable 21700 battery, so spare cells work in either light.
Price
When we checked on Nov 4, 2026, the Emisar D1K was $39.95 at intl-outdoor.com and the Olight Seeker Ultra $169.99 at olight.com, so the Emisar D1K cost $130.04 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 Emisar D1K if you want a shorter light (24 mm shorter). Choose the Olight Seeker Ultra if you want more output (4,800 lm vs 1,200 lm). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Emisar D1K Check price ↗ Olight Seeker Ultra
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
D1K vs Seeker Ultra FAQ
Which is smaller, the Emisar D1K or the Olight Seeker Ultra?
The Emisar D1K is the shorter light: 114 mm (4.49 in) against 138 mm (5.43 in), a difference of 24 mm (17%). At their widest points they are about the same (35 vs 35 mm). Weights are published on different bases (Emisar D1K: 89 g without battery; Olight Seeker Ultra: 220 g with battery), so they are not directly comparable.
Which is brighter, the Emisar D1K or the Olight Seeker Ultra?
The Olight Seeker Ultra is rated brighter: 4,800 lm maximum vs 1,200 lm for the Emisar D1K, 300% more.
Which is cheaper, the Emisar D1K or the Olight Seeker Ultra?
When we checked on Nov 4, 2026, the Emisar D1K was $39.95 at intl-outdoor.com and the Olight Seeker Ultra $169.99 at olight.com, so the Emisar D1K cost $130.04 less. Prices change often, so check the current price before you buy.
Do the Emisar D1K and Olight Seeker Ultra use the same battery?
Both run on a removable 21700 battery, so spare cells work in either light.
Compare Emisar D1K with similar lights
Compare Olight Seeker Ultra with similar lights
More
Sources
- Emisar D1K: specs from Emisar product page (manufacturer). Price $39.95 from intl-outdoor.com, checked Nov 4, 2026; prices change often.
- 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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