Fenix E03R V2.0 vs Fenix E04R size comparison
The Fenix E04R is 6 mm (0.24 in) longer than the Fenix E03R V2.0, and 4 mm wider at its widest point. It is 11 g heavier (with battery).
The Fenix E04R is 6 mm (0.24 in) longer than the Fenix E03R V2.0, and 4 mm wider at its widest point. It is 11 g heavier (with battery).
Dimensions
| Fenix E03R V2.0 Check price ↗ | Fenix E04R Check price ↗ | |
| Length | 52.5 mm (2.07 in) | 58.5 mm (2.30 in)+6 mm |
| Head / width | 26 mm (1.02 in) | 30 mm (1.18 in)+4 mm |
| Thickness | 13 mm (0.51 in) | 29.8 mm (1.17 in)+16.8 mm |
| Weight | 30 g with battery | 41 g with battery+11 g |
| Battery | Built-in | Built-in |
| Max output | 500 lm | 300 lm |
| Throw | 90 m | 46 m |
| Type | Keychain | Keychain |
| Price | $29.95 at fenixlighting.com, as of Nov 4, 2026 | $29.95 at fenixlighting.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced Listed 26.0 mm wide x 13.0 mm thick | fenixlighting.com sourced Listed 30.0 mm wide x 29.8 mm thick |
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E03R V2.0 vs E04R: how they differ
Size and weight
The Fenix E03R V2.0 is the shorter light: 52.5 mm (2.07 in) against 58.5 mm (2.30 in), a difference of 6 mm (10%). At its widest point the Fenix E03R V2.0 is 4 mm slimmer (26 vs 30 mm). The Fenix E03R V2.0 is 11 g lighter (30 g vs 41 g, with battery).
Brightness and throw
The Fenix E03R V2.0 is rated brighter: 500 lm maximum vs 300 lm for the Fenix E04R, 67% more. For beam distance the Fenix E03R V2.0 reaches further: 90 m vs 46 m rated throw (96% more).
Battery
Both run on a built-in rechargeable battery, so neither needs a separate battery.
Price
When we checked on Nov 4, 2026, the Fenix E03R V2.0 was $29.95 at fenixlighting.com and the Fenix E04R $29.95 at fenixlighting.com. Prices change often, so check the current price before you buy.
Type
Both are keychain lights in our catalog with a flat body.
Which should you buy?
Choose the Fenix E03R V2.0 if you want a shorter light (6 mm shorter), a slimmer profile (4 mm narrower), less weight (11 g lighter), more output (500 lm vs 300 lm) and longer throw (90 m vs 46 m). On the specs we track, the Fenix E03R V2.0 is ahead or level everywhere; the Fenix E04R 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 ↗ Fenix E03R V2.0 Check price ↗ Fenix E04R
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
E03R V2.0 vs E04R FAQ
Which is smaller, the Fenix E03R V2.0 or the Fenix E04R?
The Fenix E03R V2.0 is the shorter light: 52.5 mm (2.07 in) against 58.5 mm (2.30 in), a difference of 6 mm (10%). At its widest point the Fenix E03R V2.0 is 4 mm slimmer (26 vs 30 mm). The Fenix E03R V2.0 is 11 g lighter (30 g vs 41 g, with battery).
Which is brighter, the Fenix E03R V2.0 or the Fenix E04R?
The Fenix E03R V2.0 is rated brighter: 500 lm maximum vs 300 lm for the Fenix E04R, 67% more. For beam distance the Fenix E03R V2.0 reaches further: 90 m vs 46 m rated throw (96% more).
Which is cheaper, the Fenix E03R V2.0 or the Fenix E04R?
When we checked on Nov 4, 2026, the Fenix E03R V2.0 was $29.95 at fenixlighting.com and the Fenix E04R $29.95 at fenixlighting.com. Prices change often, so check the current price before you buy.
Do the Fenix E03R V2.0 and Fenix E04R use the same battery?
Both run on a built-in rechargeable battery, so neither needs a separate battery.
Compare Fenix E03R V2.0 with similar lights
Compare Fenix E04R with similar lights
More
Sources
- Fenix E03R V2.0: specs from Fenix product page (manufacturer). Price $29.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
- Fenix E04R: specs from Fenix product page (manufacturer). Price $29.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
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