Fenix E05R vs Olight i3E EOS size comparison
The Olight i3E EOS is 7.5 mm (0.30 in) shorter than the Fenix E05R, and 1.3 mm narrower at its widest point. Weights are published on different bases (listed vs with battery), so compare them with care.
The Olight i3E EOS is 7.5 mm (0.30 in) shorter than the Fenix E05R, and 1.3 mm narrower at its widest point. Weights are published on different bases (listed vs with battery), so compare them with care.
Dimensions
| Fenix E05R Check price ↗ | Olight i3E EOS Check price ↗ | |
| Length | 68 mm (2.68 in) | 60.5 mm (2.38 in)−7.5 mm |
| Head / width | 15.3 mm (0.60 in) | 14 mm (0.55 in)−1.3 mm |
| Body | 15 mm (0.59 in) | 12.5 mm (0.49 in)−2.5 mm |
| Weight | 24 g with battery | 19.4 g listed |
| Battery | Built-in | AAA |
| Max output | 400 lm | 90 lm |
| Throw | 64 m | — |
| Type | Keychain | Keychain |
| Price | $29.95 at fenixlighting.com, as of Nov 4, 2026 | $15.99 at olight.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced | olight.com sourced |
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E05R vs i3E EOS: how they differ
Size and weight
The Olight i3E EOS is the shorter light: 60.5 mm (2.38 in) against 68 mm (2.68 in), a difference of 7.5 mm (11%). At its widest point the Olight i3E EOS is 1.3 mm slimmer (14 vs 15.3 mm). Weights are published on different bases (Fenix E05R: 24 g with battery; Olight i3E EOS: 19.4 g listed), so they are not directly comparable.
Brightness and throw
The Fenix E05R is rated brighter: 400 lm maximum vs 90 lm for the Olight i3E EOS, 344% more.
Battery
The Fenix E05R runs on a built-in rechargeable battery; the Olight i3E EOS runs on a removable AAA battery. Only the Olight i3E EOS lets you swap in a charged spare.
Price
When we checked on Nov 4, 2026, the Fenix E05R was $29.95 at fenixlighting.com and the Olight i3E EOS $15.99 at olight.com, so the Olight i3E EOS cost $13.96 less. Prices change often, so check the current price before you buy.
Type
Both are keychain lights in our catalog with a tube body.
Which should you buy?
Choose the Fenix E05R if you want more output (400 lm vs 90 lm) and a built-in battery with no separate cell to buy. Choose the Olight i3E EOS if you want a shorter light (7.5 mm shorter) and a removable cell you can swap. We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix E05R Check price ↗ Olight i3E EOS
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
E05R vs i3E EOS FAQ
Which is smaller, the Fenix E05R or the Olight i3E EOS?
The Olight i3E EOS is the shorter light: 60.5 mm (2.38 in) against 68 mm (2.68 in), a difference of 7.5 mm (11%). At its widest point the Olight i3E EOS is 1.3 mm slimmer (14 vs 15.3 mm). Weights are published on different bases (Fenix E05R: 24 g with battery; Olight i3E EOS: 19.4 g listed), so they are not directly comparable.
Which is brighter, the Fenix E05R or the Olight i3E EOS?
The Fenix E05R is rated brighter: 400 lm maximum vs 90 lm for the Olight i3E EOS, 344% more.
Which is cheaper, the Fenix E05R or the Olight i3E EOS?
When we checked on Nov 4, 2026, the Fenix E05R was $29.95 at fenixlighting.com and the Olight i3E EOS $15.99 at olight.com, so the Olight i3E EOS cost $13.96 less. Prices change often, so check the current price before you buy.
Do the Fenix E05R and Olight i3E EOS use the same battery?
The Fenix E05R runs on a built-in rechargeable battery; the Olight i3E EOS runs on a removable AAA battery. Only the Olight i3E EOS lets you swap in a charged spare.
Compare Fenix E05R with similar lights
Compare Olight i3E EOS with similar lights
More
Sources
- Fenix E05R: specs from Fenix product page (manufacturer). Price $29.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
- Olight i3E EOS: specs from Olight product page (manufacturer). Price $15.99 from olight.com, checked Nov 4, 2026; prices change often.
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