Fenix LD36R vs ThruNite TC20 V3 size comparison
The ThruNite TC20 V3 is 14.6 mm (0.57 in) shorter than the Fenix LD36R, and 5 mm narrower at its widest point. It is 34 g lighter (with battery).
The ThruNite TC20 V3 is 14.6 mm (0.57 in) shorter than the Fenix LD36R, and 5 mm narrower at its widest point. It is 34 g lighter (with battery).
Dimensions
| Fenix LD36R Check price ↗ | ThruNite TC20 V3 Check price ↗ | |
| Length | 139.6 mm (5.50 in) | 125 mm (4.92 in)−14.6 mm |
| Head / width | 40 mm (1.57 in) | 35 mm (1.38 in)−5 mm |
| Body | 26.5 mm (1.04 in) | 28 mm (1.10 in)+1.5 mm |
| Weight | 231 g with battery | 197 g with battery−34 g |
| Battery | 21700 | 21700 |
| Max output | 3,600 lm | 4,720 lm |
| Throw | 385 m | — |
| Type | EDC | EDC |
| Price | from $114.95 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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LD36R vs TC20 V3: how they differ
Size and weight
The ThruNite TC20 V3 is the shorter light: 125 mm (4.92 in) against 139.6 mm (5.50 in), a difference of 14.6 mm (10%). At its widest point the ThruNite TC20 V3 is 5 mm slimmer (35 vs 40 mm). The ThruNite TC20 V3 is 34 g lighter (197 g vs 231 g, with battery).
Brightness and throw
The ThruNite TC20 V3 is rated brighter: 4,720 lm maximum vs 3,600 lm for the Fenix LD36R, 31% 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 LD36R was from $114.95 at fenixlighting.com and the ThruNite TC20 V3 $79.95 at batteryjunction.com, so the ThruNite TC20 V3 cost $35.00 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 (14.6 mm shorter), a slimmer profile (5 mm narrower), less weight (34 g lighter) and more output (4,720 lm vs 3,600 lm). On the specs we track, the ThruNite TC20 V3 is ahead or level everywhere; the Fenix LD36R 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 LD36R Check price ↗ ThruNite TC20 V3
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
LD36R vs TC20 V3 FAQ
Which is smaller, the Fenix LD36R or the ThruNite TC20 V3?
The ThruNite TC20 V3 is the shorter light: 125 mm (4.92 in) against 139.6 mm (5.50 in), a difference of 14.6 mm (10%). At its widest point the ThruNite TC20 V3 is 5 mm slimmer (35 vs 40 mm). The ThruNite TC20 V3 is 34 g lighter (197 g vs 231 g, with battery).
Which is brighter, the Fenix LD36R or the ThruNite TC20 V3?
The ThruNite TC20 V3 is rated brighter: 4,720 lm maximum vs 3,600 lm for the Fenix LD36R, 31% more.
Which is cheaper, the Fenix LD36R or the ThruNite TC20 V3?
When we checked on Nov 4, 2026, the Fenix LD36R was from $114.95 at fenixlighting.com and the ThruNite TC20 V3 $79.95 at batteryjunction.com, so the ThruNite TC20 V3 cost $35.00 less. Prices change often, so check the current price before you buy.
Do the Fenix LD36R and ThruNite TC20 V3 use the same battery?
Both run on a removable 21700 battery, so spare cells work in either light.
Compare Fenix LD36R with similar lights
Compare ThruNite TC20 V3 with similar lights
More
Sources
- Fenix LD36R: specs from Fenix product page (manufacturer). Price from $114.95 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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