Nitecore E4K vs RovyVon S3 Pro size comparison
The RovyVon S3 Pro is 2 mm (0.08 in) longer than the Nitecore E4K, with about the same max diameter/width. Weights are published on different bases (listed vs listed), so compare them with care.
The RovyVon S3 Pro is 2 mm (0.08 in) longer than the Nitecore E4K, with about the same max diameter/width. Weights are published on different bases (listed vs listed), so compare them with care.
Dimensions
| Nitecore E4K Check price ↗ | RovyVon S3 Pro Check price ↗ | |
| Length | 117 mm (4.61 in) | 119 mm (4.69 in)+2 mm |
| Head / width | 29 mm (1.14 in) | 29 mm (1.14 in)same |
| Body | 26 mm (1.02 in) | 29 mm (1.14 in)+3 mm |
| Weight | 80 g listed | 150 g listed |
| Battery | 21700 | 18650 |
| Max output | 4,400 lm | 2,800 lm |
| Throw | 211 m | 130 m |
| Type | EDC | EDC |
| Price | not verified yet | from $79.95 at batteryjunction.com, as of Nov 4, 2026 |
| Source | batteryjunction.com sourced | batteryjunction.com sourced |
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E4K vs S3 Pro: how they differ
Size and weight
The Nitecore E4K is the shorter light: 117 mm (4.61 in) against 119 mm (4.69 in), a difference of 2 mm (2%). At their widest points they are about the same (29 vs 29 mm). Weights are published on different bases (Nitecore E4K: 80 g listed; RovyVon S3 Pro: 150 g listed), so they are not directly comparable.
Brightness and throw
The Nitecore E4K is rated brighter: 4,400 lm maximum vs 2,800 lm for the RovyVon S3 Pro, 57% more. For beam distance the Nitecore E4K reaches further: 211 m vs 130 m rated throw (62% more).
Battery
The Nitecore E4K 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).
Type
Both are EDC lights in our catalog with a tube body.
Which should you buy?
Choose the Nitecore E4K if you want more output (4,400 lm vs 2,800 lm) and longer throw (211 m vs 130 m). On the specs we track, the Nitecore E4K is ahead or level everywhere; the RovyVon S3 Pro makes sense mainly if its price, interface or a feature we don't track suits you better. We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Nitecore E4K Check price ↗ RovyVon S3 Pro
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
E4K vs S3 Pro FAQ
Which is smaller, the Nitecore E4K or the RovyVon S3 Pro?
The Nitecore E4K is the shorter light: 117 mm (4.61 in) against 119 mm (4.69 in), a difference of 2 mm (2%). At their widest points they are about the same (29 vs 29 mm). Weights are published on different bases (Nitecore E4K: 80 g listed; RovyVon S3 Pro: 150 g listed), so they are not directly comparable.
Which is brighter, the Nitecore E4K or the RovyVon S3 Pro?
The Nitecore E4K is rated brighter: 4,400 lm maximum vs 2,800 lm for the RovyVon S3 Pro, 57% more. For beam distance the Nitecore E4K reaches further: 211 m vs 130 m rated throw (62% more).
Do the Nitecore E4K and RovyVon S3 Pro use the same battery?
The Nitecore E4K 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 Nitecore E4K with similar lights
Compare RovyVon S3 Pro with similar lights
More
Sources
- Nitecore E4K: specs from manufacturer published specs as listed by batteryjunction.com. No verified price yet.
- 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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