Fenix E01 V2.0 AAA vs Olight i3E EOS size comparison
The Olight i3E EOS is 6 mm (0.24 in) shorter than the Fenix E01 V2.0 AAA, and 1 mm narrower at its widest point. Weights are published on different bases (listed vs without battery), so compare them with care.
The Olight i3E EOS is 6 mm (0.24 in) shorter than the Fenix E01 V2.0 AAA, and 1 mm narrower at its widest point. Weights are published on different bases (listed vs without battery), so compare them with care.
Dimensions
| Fenix E01 V2.0 AAA Check price ↗ | Olight i3E EOS Check price ↗ | |
| Length | 66.5 mm (2.62 in) | 60.5 mm (2.38 in)−6 mm |
| Head / width | 15 mm (0.59 in) | 14 mm (0.55 in)−1 mm |
| Body | 14 mm (0.55 in) | 12.5 mm (0.49 in)−1.5 mm |
| Weight | 13 g without battery | 19.4 g listed |
| Battery | AAA | AAA |
| Max output | 100 lm | 90 lm |
| Throw | 35 m | — |
| Type | EDC | Keychain |
| Price | $12.95 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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E01 V2.0 AAA vs i3E EOS: how they differ
Size and weight
The Olight i3E EOS is the shorter light: 60.5 mm (2.38 in) against 66.5 mm (2.62 in), a difference of 6 mm (9%). At its widest point the Olight i3E EOS is 1 mm slimmer (14 vs 15 mm). Weights are published on different bases (Fenix E01 V2.0 AAA: 13 g without battery; Olight i3E EOS: 19.4 g listed), so they are not directly comparable.
Brightness and throw
The Fenix E01 V2.0 AAA is rated brighter: 100 lm maximum vs 90 lm for the Olight i3E EOS, 11% more.
Battery
Both run on a removable AAA battery, so spare cells work in either light.
Price
When we checked on Nov 4, 2026, the Fenix E01 V2.0 AAA was $12.95 at fenixlighting.com and the Olight i3E EOS $15.99 at olight.com, so the Fenix E01 V2.0 AAA cost $3.04 less. Prices change often, so check the current price before you buy.
Type
The Fenix E01 V2.0 AAA is listed as edc and the Olight i3E EOS as keychain, so they suit different jobs.
Which should you buy?
Choose the Fenix E01 V2.0 AAA if you want more output (100 lm vs 90 lm). Choose the Olight i3E EOS if you want a shorter light (6 mm shorter). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix E01 V2.0 AAA Check price ↗ Olight i3E EOS
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
E01 V2.0 AAA vs i3E EOS FAQ
Which is smaller, the Fenix E01 V2.0 AAA or the Olight i3E EOS?
The Olight i3E EOS is the shorter light: 60.5 mm (2.38 in) against 66.5 mm (2.62 in), a difference of 6 mm (9%). At its widest point the Olight i3E EOS is 1 mm slimmer (14 vs 15 mm). Weights are published on different bases (Fenix E01 V2.0 AAA: 13 g without battery; Olight i3E EOS: 19.4 g listed), so they are not directly comparable.
Which is brighter, the Fenix E01 V2.0 AAA or the Olight i3E EOS?
The Fenix E01 V2.0 AAA is rated brighter: 100 lm maximum vs 90 lm for the Olight i3E EOS, 11% more.
Which is cheaper, the Fenix E01 V2.0 AAA or the Olight i3E EOS?
When we checked on Nov 4, 2026, the Fenix E01 V2.0 AAA was $12.95 at fenixlighting.com and the Olight i3E EOS $15.99 at olight.com, so the Fenix E01 V2.0 AAA cost $3.04 less. Prices change often, so check the current price before you buy.
Do the Fenix E01 V2.0 AAA and Olight i3E EOS use the same battery?
Both run on a removable AAA battery, so spare cells work in either light.
Compare Fenix E01 V2.0 AAA with similar lights
Compare Olight i3E EOS with similar lights
More
Sources
- Fenix E01 V2.0 AAA: specs from Fenix product page (manufacturer). Price $12.95 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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