Emisar D4V2 vs RovyVon E300S G2 size comparison
The RovyVon E300S G2 is 6 mm (0.24 in) longer than the Emisar D4V2, and 9 mm wider at its widest point. Weights are published on different bases (listed vs without battery), so compare them with care.
The RovyVon E300S G2 is 6 mm (0.24 in) longer than the Emisar D4V2, and 9 mm wider at its widest point. Weights are published on different bases (listed vs without battery), so compare them with care.
Dimensions
| Emisar D4V2 Check price ↗ | RovyVon E300S G2 Check price ↗ | |
| Length | 95 mm (3.74 in) | 101 mm (3.98 in)+6 mm |
| Head / width | 28 mm (1.10 in) | 37 mm (1.46 in)+9 mm |
| Body | 24 mm (0.94 in) | — |
| Thickness | — | 17 mm (0.67 in) |
| Weight | 58 g without battery | 90 g listed |
| Battery | 18650 | Built-in |
| Max output | — | 2,400 lm |
| Throw | — | 130 m |
| Type | EDC | EDC |
| Price | $35.68 at intl-outdoor.com, as of Nov 4, 2026 | $79.95 at batteryjunction.com, as of Nov 4, 2026 |
| Source | intl-outdoor.com sourced Output depends on LED option | batteryjunction.com sourced |
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D4V2 vs E300S G2: how they differ
Size and weight
The Emisar D4V2 is the shorter light: 95 mm (3.74 in) against 101 mm (3.98 in), a difference of 6 mm (6%). At its widest point the Emisar D4V2 is 9 mm slimmer (28 vs 37 mm). Weights are published on different bases (Emisar D4V2: 58 g without battery; RovyVon E300S G2: 90 g listed), so they are not directly comparable.
Brightness and throw
The RovyVon E300S G2 is rated at 2,400 lm; we have no published maximum for the Emisar D4V2. Output for the Emisar D4V2 depends on the LED option chosen.
Battery
The Emisar D4V2 runs on a removable 18650 battery; the RovyVon E300S G2 runs on a built-in rechargeable battery. Only the Emisar D4V2 lets you swap in a charged spare.
Price
When we checked on Nov 4, 2026, the Emisar D4V2 was $35.68 at intl-outdoor.com and the RovyVon E300S G2 $79.95 at batteryjunction.com, so the Emisar D4V2 cost $44.27 less. Prices change often, so check the current price before you buy.
Type
Both are EDC lights in our catalog.
Which should you buy?
Choose the Emisar D4V2 if you want a shorter light (6 mm shorter), a slimmer profile (9 mm narrower) and a removable cell you can swap. Choose the RovyVon E300S G2 if you want a built-in battery with no separate cell to buy. We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Emisar D4V2 Check price ↗ RovyVon E300S G2
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D4V2 vs E300S G2 FAQ
Which is smaller, the Emisar D4V2 or the RovyVon E300S G2?
The Emisar D4V2 is the shorter light: 95 mm (3.74 in) against 101 mm (3.98 in), a difference of 6 mm (6%). At its widest point the Emisar D4V2 is 9 mm slimmer (28 vs 37 mm). Weights are published on different bases (Emisar D4V2: 58 g without battery; RovyVon E300S G2: 90 g listed), so they are not directly comparable.
Which is cheaper, the Emisar D4V2 or the RovyVon E300S G2?
When we checked on Nov 4, 2026, the Emisar D4V2 was $35.68 at intl-outdoor.com and the RovyVon E300S G2 $79.95 at batteryjunction.com, so the Emisar D4V2 cost $44.27 less. Prices change often, so check the current price before you buy.
Do the Emisar D4V2 and RovyVon E300S G2 use the same battery?
The Emisar D4V2 runs on a removable 18650 battery; the RovyVon E300S G2 runs on a built-in rechargeable battery. Only the Emisar D4V2 lets you swap in a charged spare.
Compare Emisar D4V2 with similar lights
Compare RovyVon E300S G2 with similar lights
More
Sources
- Emisar D4V2: specs from Emisar product page (manufacturer). Price $35.68 from intl-outdoor.com, checked Nov 4, 2026; prices change often.
- RovyVon E300S G2: specs from manufacturer published specs as listed by batteryjunction.com. Price $79.95 from batteryjunction.com, checked Nov 4, 2026; prices change often.
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