Emisar D1K vs RovyVon S3 Pro size comparison
The RovyVon S3 Pro is 5 mm (0.20 in) longer than the Emisar D1K, and 6 mm narrower at its widest point. Weights are published on different bases (listed vs without battery), so compare them with care.
The RovyVon S3 Pro is 5 mm (0.20 in) longer than the Emisar D1K, and 6 mm narrower at its widest point. Weights are published on different bases (listed vs without battery), so compare them with care.
Dimensions
| Emisar D1K Check price ↗ | RovyVon S3 Pro Check price ↗ | |
| Length | 114 mm (4.49 in) | 119 mm (4.69 in)+5 mm |
| Head / width | 35 mm (1.38 in) | 29 mm (1.14 in)−6 mm |
| Body | 26.5 mm (1.04 in) | 29 mm (1.14 in)+2.5 mm |
| Weight | 89 g without battery | 150 g listed |
| Battery | 21700 | 18650 |
| Max output | 1,200 lm | 2,800 lm |
| Throw | — | 130 m |
| Type | EDC | EDC |
| Price | $39.95 at intl-outdoor.com, as of Nov 4, 2026 | from $79.95 at batteryjunction.com, as of Nov 4, 2026 |
| Source | intl-outdoor.com sourced Pocket thrower; lumens for SFT-25 | batteryjunction.com sourced |
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D1K vs S3 Pro: how they differ
Size and weight
The Emisar D1K is the shorter light: 114 mm (4.49 in) against 119 mm (4.69 in), a difference of 5 mm (4%). At its widest point the RovyVon S3 Pro is 6 mm slimmer (29 vs 35 mm). Weights are published on different bases (Emisar D1K: 89 g without battery; RovyVon S3 Pro: 150 g listed), so they are not directly comparable.
Brightness and throw
The RovyVon S3 Pro is rated brighter: 2,800 lm maximum vs 1,200 lm for the Emisar D1K, 133% more.
Battery
The Emisar D1K 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 Emisar D1K was $39.95 at intl-outdoor.com and the RovyVon S3 Pro from $79.95 at batteryjunction.com, so the Emisar D1K 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 Emisar D1K if you want a shorter light (5 mm shorter). Choose the RovyVon S3 Pro if you want a slimmer profile (6 mm narrower) and more output (2,800 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 ↗ RovyVon S3 Pro
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D1K vs S3 Pro FAQ
Which is smaller, the Emisar D1K or the RovyVon S3 Pro?
The Emisar D1K is the shorter light: 114 mm (4.49 in) against 119 mm (4.69 in), a difference of 5 mm (4%). At its widest point the RovyVon S3 Pro is 6 mm slimmer (29 vs 35 mm). Weights are published on different bases (Emisar D1K: 89 g without battery; RovyVon S3 Pro: 150 g listed), so they are not directly comparable.
Which is brighter, the Emisar D1K or the RovyVon S3 Pro?
The RovyVon S3 Pro is rated brighter: 2,800 lm maximum vs 1,200 lm for the Emisar D1K, 133% more.
Which is cheaper, the Emisar D1K or the RovyVon S3 Pro?
When we checked on Nov 4, 2026, the Emisar D1K was $39.95 at intl-outdoor.com and the RovyVon S3 Pro from $79.95 at batteryjunction.com, so the Emisar D1K cost $40.00 less. Prices change often, so check the current price before you buy.
Do the Emisar D1K and RovyVon S3 Pro use the same battery?
The Emisar D1K 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 Emisar D1K with similar lights
Compare RovyVon S3 Pro 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.
- 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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