Fenix PD40R V3.0 vs Olight Seeker Ultra size comparison
The Olight Seeker Ultra is 5 mm (0.20 in) shorter than the Fenix PD40R V3.0, and 1 mm wider at its widest point. It is 22 g heavier (with battery).
The Olight Seeker Ultra is 5 mm (0.20 in) shorter than the Fenix PD40R V3.0, and 1 mm wider at its widest point. It is 22 g heavier (with battery).
Dimensions
| Fenix PD40R V3.0 Check price ↗ | Olight Seeker Ultra Check price ↗ | |
| Length | 143 mm (5.63 in) | 138 mm (5.43 in)−5 mm |
| Head / width | 34 mm (1.34 in) | 35 mm (1.38 in)+1 mm |
| Body | 26 mm (1.02 in) | 28 mm (1.10 in)+2 mm |
| Weight | 198 g with battery | 220 g with battery+22 g |
| Battery | 21700 | 21700 |
| Max output | 3,000 lm | 4,800 lm |
| Throw | 500 m | 265 m |
| Type | EDC | EDC |
| Price | $119.95 at fenixlighting.com, as of Nov 4, 2026 | $169.99 at olight.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced | olight.com sourced Body diameter and throw from Battery Junction |
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PD40R V3.0 vs Seeker Ultra: how they differ
Size and weight
The Olight Seeker Ultra is the shorter light: 138 mm (5.43 in) against 143 mm (5.63 in), a difference of 5 mm (3%). At its widest point the Fenix PD40R V3.0 is 1 mm slimmer (34 vs 35 mm). The Fenix PD40R V3.0 is 22 g lighter (198 g vs 220 g, with battery).
Brightness and throw
The Olight Seeker Ultra is rated brighter: 4,800 lm maximum vs 3,000 lm for the Fenix PD40R V3.0, 60% more. For beam distance the Fenix PD40R V3.0 reaches further: 500 m vs 265 m rated throw (89% more).
Battery
Both run on a removable 21700 battery, so spare cells work in either light.
Price
When we checked on Nov 4, 2026, the Fenix PD40R V3.0 was $119.95 at fenixlighting.com and the Olight Seeker Ultra $169.99 at olight.com, so the Fenix PD40R V3.0 cost $50.04 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 PD40R V3.0 if you want less weight (22 g lighter) and longer throw (500 m vs 265 m). Choose the Olight Seeker Ultra if you want a shorter light (5 mm shorter) and more output (4,800 lm vs 3,000 lm). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix PD40R V3.0 Check price ↗ Olight Seeker Ultra
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PD40R V3.0 vs Seeker Ultra FAQ
Which is smaller, the Fenix PD40R V3.0 or the Olight Seeker Ultra?
The Olight Seeker Ultra is the shorter light: 138 mm (5.43 in) against 143 mm (5.63 in), a difference of 5 mm (3%). At its widest point the Fenix PD40R V3.0 is 1 mm slimmer (34 vs 35 mm). The Fenix PD40R V3.0 is 22 g lighter (198 g vs 220 g, with battery).
Which is brighter, the Fenix PD40R V3.0 or the Olight Seeker Ultra?
The Olight Seeker Ultra is rated brighter: 4,800 lm maximum vs 3,000 lm for the Fenix PD40R V3.0, 60% more. For beam distance the Fenix PD40R V3.0 reaches further: 500 m vs 265 m rated throw (89% more).
Which is cheaper, the Fenix PD40R V3.0 or the Olight Seeker Ultra?
When we checked on Nov 4, 2026, the Fenix PD40R V3.0 was $119.95 at fenixlighting.com and the Olight Seeker Ultra $169.99 at olight.com, so the Fenix PD40R V3.0 cost $50.04 less. Prices change often, so check the current price before you buy.
Do the Fenix PD40R V3.0 and Olight Seeker Ultra use the same battery?
Both run on a removable 21700 battery, so spare cells work in either light.
Compare Fenix PD40R V3.0 with similar lights
Compare Olight Seeker Ultra with similar lights
More
Sources
- Fenix PD40R V3.0: specs from Fenix product page (manufacturer). Price $119.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
- Olight Seeker Ultra: specs from Olight product page (manufacturer). Price $169.99 from olight.com, checked Nov 4, 2026; prices change often.
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