Emisar D1K vs Olight Seeker 4 size comparison
The Olight Seeker 4 is 20 mm (0.79 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 4 is 20 mm (0.79 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 4 Check price ↗ | |
| Length | 114 mm (4.49 in) | 134 mm (5.28 in)+20 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 | 205 g with battery |
| Battery | 21700 | 21700 |
| Max output | 1,200 lm | 3,100 lm |
| Throw | — | — |
| Type | EDC | EDC not on olight.com (US) |
| Price | $39.95 at intl-outdoor.com, as of Nov 4, 2026 | not verified yet |
| Source | intl-outdoor.com sourced Pocket thrower; lumens for SFT-25 | batteryjunction.com sourced Retailer lists 400 m throw, which conflicts with Olight figures for the series; throw omitted |
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D1K vs Seeker 4: how they differ
Size and weight
The Emisar D1K is the shorter light: 114 mm (4.49 in) against 134 mm (5.28 in), a difference of 20 mm (15%). 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 4: 205 g with battery), so they are not directly comparable.
Brightness and throw
The Olight Seeker 4 is rated brighter: 3,100 lm maximum vs 1,200 lm for the Emisar D1K, 158% 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 Emisar D1K if you want a shorter light (20 mm shorter). Choose the Olight Seeker 4 if you want more output (3,100 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 4
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D1K vs Seeker 4 FAQ
Which is smaller, the Emisar D1K or the Olight Seeker 4?
The Emisar D1K is the shorter light: 114 mm (4.49 in) against 134 mm (5.28 in), a difference of 20 mm (15%). 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 4: 205 g with battery), so they are not directly comparable.
Which is brighter, the Emisar D1K or the Olight Seeker 4?
The Olight Seeker 4 is rated brighter: 3,100 lm maximum vs 1,200 lm for the Emisar D1K, 158% more.
Do the Emisar D1K and Olight Seeker 4 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 4 with similar lights
More
Sources
- Emisar D1K: specs from Emisar product page (manufacturer). Drawing: outline from published specs. Price $39.95 from intl-outdoor.com, checked Nov 4, 2026; prices change often.
- Olight Seeker 4: specs from manufacturer published specs as listed by batteryjunction.com. Drawing: shape measured from manufacturer photo (batteryjunction.com), scaled to the published length and diameter. No verified price yet.
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