Fenix E08R UE vs Olight Seeker 3 size comparison
The Olight Seeker 3 is 1 mm (0.04 in) shorter than the Fenix E08R UE, and 4 mm wider at its widest point. It is 59 g heavier (with battery).
Fenix E08R UE: Photo: Fenix · Image policy
The Olight Seeker 3 is 1 mm (0.04 in) shorter than the Fenix E08R UE, and 4 mm wider at its widest point. It is 59 g heavier (with battery).
Dimensions
| Fenix E08R UE Check price ↗ | Olight Seeker 3 Check price ↗ | |
| Length | 129 mm (5.08 in) | 128 mm (5.04 in)−1 mm |
| Head / width | 31 mm (1.22 in) | 35 mm (1.38 in)+4 mm |
| Body | — | 27.5 mm (1.08 in) |
| Thickness | 18 mm (0.71 in) | — |
| Weight | 125 g with battery | 184 g with battery+59 g |
| Battery | Built-in | 21700 |
| Max output | 1,600 lm | 3,500 lm |
| Throw | 160 m | 220 m |
| Type | EDC | EDC |
| Price | $84.95 at fenixlighting.com, as of Nov 4, 2026 | $119.95 at olight.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced Listed 31.0 mm wide x 18.0 mm thick | olight.com sourced |
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E08R UE vs Seeker 3: how they differ
Size and weight
The Olight Seeker 3 is the shorter light: 128 mm (5.04 in) against 129 mm (5.08 in), a difference of 1 mm (1%). At its widest point the Fenix E08R UE is 4 mm slimmer (31 vs 35 mm). The Fenix E08R UE is 59 g lighter (125 g vs 184 g, with battery).
Brightness and throw
The Olight Seeker 3 is rated brighter: 3,500 lm maximum vs 1,600 lm for the Fenix E08R UE, 119% more. For beam distance the Olight Seeker 3 reaches further: 220 m vs 160 m rated throw (38% more).
Battery
The Fenix E08R UE runs on a built-in rechargeable battery; the Olight Seeker 3 runs on a removable 21700 battery. Only the Olight Seeker 3 lets you swap in a charged spare.
Price
When we checked on Nov 4, 2026, the Fenix E08R UE was $84.95 at fenixlighting.com and the Olight Seeker 3 $119.95 at olight.com, so the Fenix E08R UE cost $35.00 less. Prices change often, so check the current price before you buy.
Type
Both are EDC lights in our catalog.
Which should you buy?
Choose the Fenix E08R UE if you want a slimmer profile (4 mm narrower), less weight (59 g lighter) and a built-in battery with no separate cell to buy. Choose the Olight Seeker 3 if you want more output (3,500 lm vs 1,600 lm), longer throw (220 m vs 160 m) 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 E08R UE Check price ↗ Olight Seeker 3
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E08R UE vs Seeker 3 FAQ
Which is smaller, the Fenix E08R UE or the Olight Seeker 3?
The Olight Seeker 3 is the shorter light: 128 mm (5.04 in) against 129 mm (5.08 in), a difference of 1 mm (1%). At its widest point the Fenix E08R UE is 4 mm slimmer (31 vs 35 mm). The Fenix E08R UE is 59 g lighter (125 g vs 184 g, with battery).
Which is brighter, the Fenix E08R UE or the Olight Seeker 3?
The Olight Seeker 3 is rated brighter: 3,500 lm maximum vs 1,600 lm for the Fenix E08R UE, 119% more. For beam distance the Olight Seeker 3 reaches further: 220 m vs 160 m rated throw (38% more).
Which is cheaper, the Fenix E08R UE or the Olight Seeker 3?
When we checked on Nov 4, 2026, the Fenix E08R UE was $84.95 at fenixlighting.com and the Olight Seeker 3 $119.95 at olight.com, so the Fenix E08R UE cost $35.00 less. Prices change often, so check the current price before you buy.
Do the Fenix E08R UE and Olight Seeker 3 use the same battery?
The Fenix E08R UE runs on a built-in rechargeable battery; the Olight Seeker 3 runs on a removable 21700 battery. Only the Olight Seeker 3 lets you swap in a charged spare.
Compare Fenix E08R UE with similar lights
Compare Olight Seeker 3 with similar lights
More
Sources
- Fenix E08R UE: specs from Fenix product page (manufacturer). Photo from manufacturer: the maker's own product photo with the background removed, scaled to the published length and diameter (Photo: Fenix; image policy). Price $84.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
- Olight Seeker 3: specs from Olight product page (manufacturer). Drawing: outline from published specs. Price $119.95 from olight.com, checked Nov 4, 2026; prices change often.
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