Fenix E01 V2.0 AAA vs Olight i3T EOS size comparison
The Olight i3T EOS is 22.5 mm (0.89 in) longer than the Fenix E01 V2.0 AAA, with about the same max diameter/width. Weights are published on different bases (with battery vs without battery), so compare them with care.
The Olight i3T EOS is 22.5 mm (0.89 in) longer than the Fenix E01 V2.0 AAA, with about the same max diameter/width. Weights are published on different bases (with battery vs without battery), so compare them with care.
Dimensions
| Fenix E01 V2.0 AAA Check price ↗ | Olight i3T EOS Check price ↗ | |
| Length | 66.5 mm (2.62 in) | 89 mm (3.50 in)+22.5 mm |
| Head / width | 15 mm (0.59 in) | 15 mm (0.59 in)same |
| Body | 14 mm (0.55 in) | 15 mm (0.59 in)+1 mm |
| Weight | 13 g without battery | 41 g with battery |
| Battery | AAA | AAA |
| Max output | 100 lm | 180 lm |
| Throw | 35 m | — |
| Type | EDC | EDC |
| Price | $12.95 at fenixlighting.com, as of Nov 4, 2026 | $17.99 at olight.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced | batteryjunction.com sourced |
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E01 V2.0 AAA vs i3T EOS: how they differ
Size and weight
The Fenix E01 V2.0 AAA is the shorter light: 66.5 mm (2.62 in) against 89 mm (3.50 in), a difference of 22.5 mm (25%). At their widest points they are about the same (15 vs 15 mm). Weights are published on different bases (Fenix E01 V2.0 AAA: 13 g without battery; Olight i3T EOS: 41 g with battery), so they are not directly comparable.
Brightness and throw
The Olight i3T EOS is rated brighter: 180 lm maximum vs 100 lm for the Fenix E01 V2.0 AAA, 80% 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 i3T EOS $17.99 at olight.com, so the Fenix E01 V2.0 AAA cost $5.04 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 E01 V2.0 AAA if you want a shorter light (22.5 mm shorter). Choose the Olight i3T EOS if you want more output (180 lm vs 100 lm). 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 i3T 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 i3T EOS FAQ
Which is smaller, the Fenix E01 V2.0 AAA or the Olight i3T EOS?
The Fenix E01 V2.0 AAA is the shorter light: 66.5 mm (2.62 in) against 89 mm (3.50 in), a difference of 22.5 mm (25%). At their widest points they are about the same (15 vs 15 mm). Weights are published on different bases (Fenix E01 V2.0 AAA: 13 g without battery; Olight i3T EOS: 41 g with battery), so they are not directly comparable.
Which is brighter, the Fenix E01 V2.0 AAA or the Olight i3T EOS?
The Olight i3T EOS is rated brighter: 180 lm maximum vs 100 lm for the Fenix E01 V2.0 AAA, 80% more.
Which is cheaper, the Fenix E01 V2.0 AAA or the Olight i3T EOS?
When we checked on Nov 4, 2026, the Fenix E01 V2.0 AAA was $12.95 at fenixlighting.com and the Olight i3T EOS $17.99 at olight.com, so the Fenix E01 V2.0 AAA cost $5.04 less. Prices change often, so check the current price before you buy.
Do the Fenix E01 V2.0 AAA and Olight i3T 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 i3T 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 i3T EOS: specs from Olight product page (manufacturer); manufacturer published specs as listed by batteryjunction.com. Price $17.99 from olight.com, checked Nov 4, 2026; prices change often.
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