Fenix E09R vs Olight i3T EOS size comparison
The Olight i3T EOS is 10 mm (0.39 in) longer than the Fenix E09R, and 4.3 mm narrower at its widest point. It is 4 g lighter (with battery).
The Olight i3T EOS is 10 mm (0.39 in) longer than the Fenix E09R, and 4.3 mm narrower at its widest point. It is 4 g lighter (with battery).
Dimensions
| Fenix E09R Check price ↗ | Olight i3T EOS Check price ↗ | |
| Length | 79 mm (3.11 in) | 89 mm (3.50 in)+10 mm |
| Head / width | 19.3 mm (0.76 in) | 15 mm (0.59 in)−4.3 mm |
| Body | 18.4 mm (0.72 in) | 15 mm (0.59 in)−3.4 mm |
| Weight | 45 g with battery | 41 g with battery−4 g |
| Battery | Built-in | AAA |
| Max output | 600 lm | 180 lm |
| Throw | 91 m | — |
| Type | EDC | EDC |
| Price | $39.95 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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E09R vs i3T EOS: how they differ
Size and weight
The Fenix E09R is the shorter light: 79 mm (3.11 in) against 89 mm (3.50 in), a difference of 10 mm (11%). At its widest point the Olight i3T EOS is 4.3 mm slimmer (15 vs 19.3 mm). The Olight i3T EOS is 4 g lighter (41 g vs 45 g, with battery).
Brightness and throw
The Fenix E09R is rated brighter: 600 lm maximum vs 180 lm for the Olight i3T EOS, 233% more.
Battery
The Fenix E09R runs on a built-in rechargeable battery; the Olight i3T EOS runs on a removable AAA battery. Only the Olight i3T EOS lets you swap in a charged spare.
Price
When we checked on Nov 4, 2026, the Fenix E09R was $39.95 at fenixlighting.com and the Olight i3T EOS $17.99 at olight.com, so the Olight i3T EOS cost $21.96 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 E09R if you want a shorter light (10 mm shorter), more output (600 lm vs 180 lm) and a built-in battery with no separate cell to buy. Choose the Olight i3T EOS if you want a slimmer profile (4.3 mm narrower) 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 E09R Check price ↗ Olight i3T EOS
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
E09R vs i3T EOS FAQ
Which is smaller, the Fenix E09R or the Olight i3T EOS?
The Fenix E09R is the shorter light: 79 mm (3.11 in) against 89 mm (3.50 in), a difference of 10 mm (11%). At its widest point the Olight i3T EOS is 4.3 mm slimmer (15 vs 19.3 mm). The Olight i3T EOS is 4 g lighter (41 g vs 45 g, with battery).
Which is brighter, the Fenix E09R or the Olight i3T EOS?
The Fenix E09R is rated brighter: 600 lm maximum vs 180 lm for the Olight i3T EOS, 233% more.
Which is cheaper, the Fenix E09R or the Olight i3T EOS?
When we checked on Nov 4, 2026, the Fenix E09R was $39.95 at fenixlighting.com and the Olight i3T EOS $17.99 at olight.com, so the Olight i3T EOS cost $21.96 less. Prices change often, so check the current price before you buy.
Do the Fenix E09R and Olight i3T EOS use the same battery?
The Fenix E09R runs on a built-in rechargeable battery; the Olight i3T EOS runs on a removable AAA battery. Only the Olight i3T EOS lets you swap in a charged spare.
Compare Fenix E09R with similar lights
Compare Olight i3T EOS with similar lights
More
Sources
- Fenix E09R: specs from Fenix product page (manufacturer). Price $39.95 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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