Olight i3E EOS vs RovyVon E3 size comparison
The RovyVon E3 is 5.5 mm (0.22 in) longer than the Olight i3E EOS, and 13 mm wider at its widest point. Weights are published on different bases (listed vs listed), so compare them with care.
The RovyVon E3 is 5.5 mm (0.22 in) longer than the Olight i3E EOS, and 13 mm wider at its widest point. Weights are published on different bases (listed vs listed), so compare them with care.
Dimensions
| Olight i3E EOS Check price ↗ | RovyVon E3 Check price ↗ | |
| Length | 60.5 mm (2.38 in) | 66 mm (2.60 in)+5.5 mm |
| Head / width | 14 mm (0.55 in) | 27 mm (1.06 in)+13 mm |
| Body | 12.5 mm (0.49 in) | — |
| Thickness | — | 13 mm (0.51 in) |
| Weight | 19.4 g listed | 32 g listed |
| Battery | AAA | Built-in |
| Max output | 90 lm | 700 lm |
| Throw | — | 70 m |
| Type | Keychain | Keychain |
| Price | $15.99 at olight.com, as of Nov 4, 2026 | $39.95 at batteryjunction.com, as of Nov 4, 2026 |
| Source | olight.com sourced | batteryjunction.com sourced |
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i3E EOS vs E3: how they differ
Size and weight
The Olight i3E EOS is the shorter light: 60.5 mm (2.38 in) against 66 mm (2.60 in), a difference of 5.5 mm (8%). At its widest point the Olight i3E EOS is 13 mm slimmer (14 vs 27 mm). Weights are published on different bases (Olight i3E EOS: 19.4 g listed; RovyVon E3: 32 g listed), so they are not directly comparable.
Brightness and throw
The RovyVon E3 is rated brighter: 700 lm maximum vs 90 lm for the Olight i3E EOS, 678% more.
Battery
The Olight i3E EOS runs on a removable AAA battery; the RovyVon E3 runs on a built-in rechargeable battery. Only the Olight i3E EOS lets you swap in a charged spare.
Price
When we checked on Nov 4, 2026, the Olight i3E EOS was $15.99 at olight.com and the RovyVon E3 $39.95 at batteryjunction.com, so the Olight i3E EOS cost $23.96 less. Prices change often, so check the current price before you buy.
Type
Both are keychain lights in our catalog.
Which should you buy?
Choose the Olight i3E EOS if you want a shorter light (5.5 mm shorter), a slimmer profile (13 mm narrower) and a removable cell you can swap. Choose the RovyVon E3 if you want more output (700 lm vs 90 lm) and a built-in battery with no separate cell to buy. We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Olight i3E EOS Check price ↗ RovyVon E3
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
i3E EOS vs E3 FAQ
Which is smaller, the Olight i3E EOS or the RovyVon E3?
The Olight i3E EOS is the shorter light: 60.5 mm (2.38 in) against 66 mm (2.60 in), a difference of 5.5 mm (8%). At its widest point the Olight i3E EOS is 13 mm slimmer (14 vs 27 mm). Weights are published on different bases (Olight i3E EOS: 19.4 g listed; RovyVon E3: 32 g listed), so they are not directly comparable.
Which is brighter, the Olight i3E EOS or the RovyVon E3?
The RovyVon E3 is rated brighter: 700 lm maximum vs 90 lm for the Olight i3E EOS, 678% more.
Which is cheaper, the Olight i3E EOS or the RovyVon E3?
When we checked on Nov 4, 2026, the Olight i3E EOS was $15.99 at olight.com and the RovyVon E3 $39.95 at batteryjunction.com, so the Olight i3E EOS cost $23.96 less. Prices change often, so check the current price before you buy.
Do the Olight i3E EOS and RovyVon E3 use the same battery?
The Olight i3E EOS runs on a removable AAA battery; the RovyVon E3 runs on a built-in rechargeable battery. Only the Olight i3E EOS lets you swap in a charged spare.
Compare Olight i3E EOS with similar lights
Compare RovyVon E3 with similar lights
More
Sources
- Olight i3E EOS: specs from Olight product page (manufacturer). Price $15.99 from olight.com, checked Nov 4, 2026; prices change often.
- RovyVon E3: specs from manufacturer published specs as listed by batteryjunction.com. Price $39.95 from batteryjunction.com, checked Nov 4, 2026; prices change often.
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