Fenix E20 V2.0 AA vs RovyVon S3 Pro size comparison
The RovyVon S3 Pro is 8 mm (0.31 in) shorter than the Fenix E20 V2.0 AA, and 8 mm wider at its widest point. Weights are published on different bases (listed vs without battery), so compare them with care.
The RovyVon S3 Pro is 8 mm (0.31 in) shorter than the Fenix E20 V2.0 AA, and 8 mm wider at its widest point. Weights are published on different bases (listed vs without battery), so compare them with care.
Dimensions
| Fenix E20 V2.0 AA Check price ↗ | RovyVon S3 Pro Check price ↗ | |
| Length | 127 mm (5.00 in) | 119 mm (4.69 in)−8 mm |
| Head / width | 21 mm (0.83 in) | 29 mm (1.14 in)+8 mm |
| Body | 16.8 mm (0.66 in) | 29 mm (1.14 in)+12.2 mm |
| Weight | 42 g without battery | 150 g listed |
| Battery | 2x AA | 18650 |
| Max output | 350 lm | 2,800 lm |
| Throw | 126 m | 130 m |
| Type | EDC | EDC |
| Price | $44.95 at fenixlighting.com, as of Nov 4, 2026 | from $79.95 at batteryjunction.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced | batteryjunction.com sourced |
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E20 V2.0 AA vs S3 Pro: how they differ
Size and weight
The RovyVon S3 Pro is the shorter light: 119 mm (4.69 in) against 127 mm (5.00 in), a difference of 8 mm (6%). At its widest point the Fenix E20 V2.0 AA is 8 mm slimmer (21 vs 29 mm). Weights are published on different bases (Fenix E20 V2.0 AA: 42 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 350 lm for the Fenix E20 V2.0 AA, 700% more. For beam distance the RovyVon S3 Pro reaches further: 130 m vs 126 m rated throw (3% more).
Battery
The Fenix E20 V2.0 AA runs on removable 2x AA batteries; the RovyVon S3 Pro runs on a removable 18650 battery. For scale, a AA cell is about 14.5 × 50.5 mm and a 18650 about 18 × 65 mm (nominal).
Price
When we checked on Nov 4, 2026, the Fenix E20 V2.0 AA was $44.95 at fenixlighting.com and the RovyVon S3 Pro from $79.95 at batteryjunction.com, so the Fenix E20 V2.0 AA cost $35.00 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 Fenix E20 V2.0 AA if you want a slimmer profile (8 mm narrower). Choose the RovyVon S3 Pro if you want a shorter light (8 mm shorter) and more output (2,800 lm vs 350 lm). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix E20 V2.0 AA Check price ↗ RovyVon S3 Pro
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
E20 V2.0 AA vs S3 Pro FAQ
Which is smaller, the Fenix E20 V2.0 AA or the RovyVon S3 Pro?
The RovyVon S3 Pro is the shorter light: 119 mm (4.69 in) against 127 mm (5.00 in), a difference of 8 mm (6%). At its widest point the Fenix E20 V2.0 AA is 8 mm slimmer (21 vs 29 mm). Weights are published on different bases (Fenix E20 V2.0 AA: 42 g without battery; RovyVon S3 Pro: 150 g listed), so they are not directly comparable.
Which is brighter, the Fenix E20 V2.0 AA or the RovyVon S3 Pro?
The RovyVon S3 Pro is rated brighter: 2,800 lm maximum vs 350 lm for the Fenix E20 V2.0 AA, 700% more. For beam distance the RovyVon S3 Pro reaches further: 130 m vs 126 m rated throw (3% more).
Which is cheaper, the Fenix E20 V2.0 AA or the RovyVon S3 Pro?
When we checked on Nov 4, 2026, the Fenix E20 V2.0 AA was $44.95 at fenixlighting.com and the RovyVon S3 Pro from $79.95 at batteryjunction.com, so the Fenix E20 V2.0 AA cost $35.00 less. Prices change often, so check the current price before you buy.
Do the Fenix E20 V2.0 AA and RovyVon S3 Pro use the same battery?
The Fenix E20 V2.0 AA runs on removable 2x AA batteries; the RovyVon S3 Pro runs on a removable 18650 battery. For scale, a AA cell is about 14.5 × 50.5 mm and a 18650 about 18 × 65 mm (nominal).
Compare Fenix E20 V2.0 AA with similar lights
Compare RovyVon S3 Pro with similar lights
More
Sources
- Fenix E20 V2.0 AA: specs from Fenix product page (manufacturer). Drawing: outline from published specs. Price $44.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
- RovyVon S3 Pro: specs from manufacturer published specs as listed by batteryjunction.com. Drawing: outline from published specs. Price from $79.95 from batteryjunction.com, checked Nov 4, 2026; prices change often.
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