Fenix PD40R V3.0 vs ThruNite TC20 V3 size comparison
The ThruNite TC20 V3 is 18 mm (0.71 in) shorter than the Fenix PD40R V3.0, and 1 mm wider at its widest point. It is 1 g lighter (with battery).
The ThruNite TC20 V3 is 18 mm (0.71 in) shorter than the Fenix PD40R V3.0, and 1 mm wider at its widest point. It is 1 g lighter (with battery).
Dimensions
| Fenix PD40R V3.0 Check price ↗ | ThruNite TC20 V3 Check price ↗ | |
| Length | 143 mm (5.63 in) | 125 mm (4.92 in)−18 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 | 197 g with battery−1 g |
| Battery | 21700 | 21700 |
| Max output | 3,000 lm | 4,720 lm |
| Throw | 500 m | — |
| Type | EDC | EDC |
| Price | $119.95 at fenixlighting.com, as of Nov 4, 2026 | $79.95 at batteryjunction.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced | batteryjunction.com sourced |
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PD40R V3.0 vs TC20 V3: how they differ
Size and weight
The ThruNite TC20 V3 is the shorter light: 125 mm (4.92 in) against 143 mm (5.63 in), a difference of 18 mm (13%). At its widest point the Fenix PD40R V3.0 is 1 mm slimmer (34 vs 35 mm). The ThruNite TC20 V3 is 1 g lighter (197 g vs 198 g, with battery).
Brightness and throw
The ThruNite TC20 V3 is rated brighter: 4,720 lm maximum vs 3,000 lm for the Fenix PD40R V3.0, 57% 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 ThruNite TC20 V3 $79.95 at batteryjunction.com, so the ThruNite TC20 V3 cost $40.00 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 ThruNite TC20 V3 if you want a shorter light (18 mm shorter) and more output (4,720 lm vs 3,000 lm). On the specs we track, the ThruNite TC20 V3 is ahead or level everywhere; the Fenix PD40R V3.0 makes sense mainly if its price, interface or a feature we don't track suits you better. We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix PD40R V3.0 Check price ↗ ThruNite TC20 V3
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PD40R V3.0 vs TC20 V3 FAQ
Which is smaller, the Fenix PD40R V3.0 or the ThruNite TC20 V3?
The ThruNite TC20 V3 is the shorter light: 125 mm (4.92 in) against 143 mm (5.63 in), a difference of 18 mm (13%). At its widest point the Fenix PD40R V3.0 is 1 mm slimmer (34 vs 35 mm). The ThruNite TC20 V3 is 1 g lighter (197 g vs 198 g, with battery).
Which is brighter, the Fenix PD40R V3.0 or the ThruNite TC20 V3?
The ThruNite TC20 V3 is rated brighter: 4,720 lm maximum vs 3,000 lm for the Fenix PD40R V3.0, 57% more.
Which is cheaper, the Fenix PD40R V3.0 or the ThruNite TC20 V3?
When we checked on Nov 4, 2026, the Fenix PD40R V3.0 was $119.95 at fenixlighting.com and the ThruNite TC20 V3 $79.95 at batteryjunction.com, so the ThruNite TC20 V3 cost $40.00 less. Prices change often, so check the current price before you buy.
Do the Fenix PD40R V3.0 and ThruNite TC20 V3 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 ThruNite TC20 V3 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.
- ThruNite TC20 V3: specs from manufacturer published specs as listed by batteryjunction.com. Price $79.95 from batteryjunction.com, checked Nov 4, 2026; prices change often.
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