Fenix PD36R PRO vs Olight Seeker 4 Pro size comparison
The Olight Seeker 4 Pro is 12.8 mm (0.50 in) shorter than the Fenix PD36R PRO, and 8.5 mm wider at its widest point. It is 36 g heavier (with battery).
The Olight Seeker 4 Pro is 12.8 mm (0.50 in) shorter than the Fenix PD36R PRO, and 8.5 mm wider at its widest point. It is 36 g heavier (with battery).
Dimensions
| Fenix PD36R PRO Check price ↗ | Olight Seeker 4 Pro Check price ↗ | |
| Length | 145.8 mm (5.74 in) | 133 mm (5.24 in)−12.8 mm |
| Head / width | 26.5 mm (1.04 in) | 35 mm (1.38 in)+8.5 mm |
| Body | 25.7 mm (1.01 in) | 28 mm (1.10 in)+2.3 mm |
| Weight | 169 g with battery | 205 g with battery+36 g |
| Battery | 21700 | 21700 |
| Max output | 2,800 lm | 4,600 lm |
| Throw | 380 m | 260 m |
| Type | EDC | EDC |
| Price | $119.95 at fenixlighting.com, as of Nov 4, 2026 | $139.99 at olight.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced | olight.com sourced |
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PD36R PRO vs Seeker 4 Pro: how they differ
Size and weight
The Olight Seeker 4 Pro is the shorter light: 133 mm (5.24 in) against 145.8 mm (5.74 in), a difference of 12.8 mm (9%). At its widest point the Fenix PD36R PRO is 8.5 mm slimmer (26.5 vs 35 mm). The Fenix PD36R PRO is 36 g lighter (169 g vs 205 g, with battery).
Brightness and throw
The Olight Seeker 4 Pro is rated brighter: 4,600 lm maximum vs 2,800 lm for the Fenix PD36R PRO, 64% more. For beam distance the Fenix PD36R PRO reaches further: 380 m vs 260 m rated throw (46% 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 PD36R PRO was $119.95 at fenixlighting.com and the Olight Seeker 4 Pro $139.99 at olight.com, so the Fenix PD36R PRO cost $20.04 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 PD36R PRO if you want a slimmer profile (8.5 mm narrower), less weight (36 g lighter) and longer throw (380 m vs 260 m). Choose the Olight Seeker 4 Pro if you want a shorter light (12.8 mm shorter) and more output (4,600 lm vs 2,800 lm). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix PD36R PRO Check price ↗ Olight Seeker 4 Pro
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PD36R PRO vs Seeker 4 Pro FAQ
Which is smaller, the Fenix PD36R PRO or the Olight Seeker 4 Pro?
The Olight Seeker 4 Pro is the shorter light: 133 mm (5.24 in) against 145.8 mm (5.74 in), a difference of 12.8 mm (9%). At its widest point the Fenix PD36R PRO is 8.5 mm slimmer (26.5 vs 35 mm). The Fenix PD36R PRO is 36 g lighter (169 g vs 205 g, with battery).
Which is brighter, the Fenix PD36R PRO or the Olight Seeker 4 Pro?
The Olight Seeker 4 Pro is rated brighter: 4,600 lm maximum vs 2,800 lm for the Fenix PD36R PRO, 64% more. For beam distance the Fenix PD36R PRO reaches further: 380 m vs 260 m rated throw (46% more).
Which is cheaper, the Fenix PD36R PRO or the Olight Seeker 4 Pro?
When we checked on Nov 4, 2026, the Fenix PD36R PRO was $119.95 at fenixlighting.com and the Olight Seeker 4 Pro $139.99 at olight.com, so the Fenix PD36R PRO cost $20.04 less. Prices change often, so check the current price before you buy.
Do the Fenix PD36R PRO and Olight Seeker 4 Pro use the same battery?
Both run on a removable 21700 battery, so spare cells work in either light.
Compare Fenix PD36R PRO with similar lights
Compare Olight Seeker 4 Pro with similar lights
More
Sources
- Fenix PD36R PRO: specs from Fenix product page (manufacturer). Drawing: outline from published specs. Price $119.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
- Olight Seeker 4 Pro: specs from Olight product page (manufacturer). Drawing: shape measured from manufacturer photo (batteryjunction.com), scaled to the published length and diameter. Price $139.99 from olight.com, checked Nov 4, 2026; prices change often.
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