Fenix TK20R V2.0 vs ThruNite BSS V6 size comparison
The ThruNite BSS V6 is 7 mm (0.28 in) shorter than the Fenix TK20R V2.0, and 9 mm narrower at its widest point. Weights are published on different bases (listed vs with battery), so compare them with care.
The ThruNite BSS V6 is 7 mm (0.28 in) shorter than the Fenix TK20R V2.0, and 9 mm narrower at its widest point. Weights are published on different bases (listed vs with battery), so compare them with care.
Dimensions
| Fenix TK20R V2.0 Check price ↗ | ThruNite BSS V6 Check price ↗ | |
| Length | 153 mm (6.02 in) | 146 mm (5.75 in)−7 mm |
| Head / width | 34 mm (1.34 in) | 25 mm (0.98 in)−9 mm |
| Body | 25.4 mm (1.00 in) | 24 mm (0.94 in)−1.4 mm |
| Weight | 204 g with battery | 97 g listed |
| Battery | 21700 | 18650 |
| Max output | 3,000 lm | 2,000 lm |
| Throw | 475 m | 259 m |
| Type | Tactical | Tactical |
| Price | $129.95 at fenixlighting.com, as of Nov 4, 2026 | $49.99 at batteryjunction.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced | batteryjunction.com sourced |
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TK20R V2.0 vs BSS V6: how they differ
Size and weight
The ThruNite BSS V6 is the shorter light: 146 mm (5.75 in) against 153 mm (6.02 in), a difference of 7 mm (5%). At its widest point the ThruNite BSS V6 is 9 mm slimmer (25 vs 34 mm). Weights are published on different bases (Fenix TK20R V2.0: 204 g with battery; ThruNite BSS V6: 97 g listed), so they are not directly comparable.
Brightness and throw
The Fenix TK20R V2.0 is rated brighter: 3,000 lm maximum vs 2,000 lm for the ThruNite BSS V6, 50% more. For beam distance the Fenix TK20R V2.0 reaches further: 475 m vs 259 m rated throw (83% more).
Battery
The Fenix TK20R V2.0 runs on a removable 21700 battery; the ThruNite BSS V6 runs on a removable 18650 battery. For scale, a 21700 cell is about 21 × 70 mm and a 18650 about 18 × 65 mm (nominal).
Price
When we checked on Nov 4, 2026, the Fenix TK20R V2.0 was $129.95 at fenixlighting.com and the ThruNite BSS V6 $49.99 at batteryjunction.com, so the ThruNite BSS V6 cost $79.96 less. Prices change often, so check the current price before you buy.
Type
Both are tactical lights in our catalog with a tube body.
Which should you buy?
Choose the Fenix TK20R V2.0 if you want more output (3,000 lm vs 2,000 lm) and longer throw (475 m vs 259 m). Choose the ThruNite BSS V6 if you want a shorter light (7 mm shorter) and a slimmer profile (9 mm narrower). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix TK20R V2.0 Check price ↗ ThruNite BSS V6
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
TK20R V2.0 vs BSS V6 FAQ
Which is smaller, the Fenix TK20R V2.0 or the ThruNite BSS V6?
The ThruNite BSS V6 is the shorter light: 146 mm (5.75 in) against 153 mm (6.02 in), a difference of 7 mm (5%). At its widest point the ThruNite BSS V6 is 9 mm slimmer (25 vs 34 mm). Weights are published on different bases (Fenix TK20R V2.0: 204 g with battery; ThruNite BSS V6: 97 g listed), so they are not directly comparable.
Which is brighter, the Fenix TK20R V2.0 or the ThruNite BSS V6?
The Fenix TK20R V2.0 is rated brighter: 3,000 lm maximum vs 2,000 lm for the ThruNite BSS V6, 50% more. For beam distance the Fenix TK20R V2.0 reaches further: 475 m vs 259 m rated throw (83% more).
Which is cheaper, the Fenix TK20R V2.0 or the ThruNite BSS V6?
When we checked on Nov 4, 2026, the Fenix TK20R V2.0 was $129.95 at fenixlighting.com and the ThruNite BSS V6 $49.99 at batteryjunction.com, so the ThruNite BSS V6 cost $79.96 less. Prices change often, so check the current price before you buy.
Do the Fenix TK20R V2.0 and ThruNite BSS V6 use the same battery?
The Fenix TK20R V2.0 runs on a removable 21700 battery; the ThruNite BSS V6 runs on a removable 18650 battery. For scale, a 21700 cell is about 21 × 70 mm and a 18650 about 18 × 65 mm (nominal).
Compare Fenix TK20R V2.0 with similar lights
Compare ThruNite BSS V6 with similar lights
More
Sources
- Fenix TK20R V2.0: specs from Fenix product page (manufacturer). Price $129.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
- ThruNite BSS V6: specs from manufacturer published specs as listed by batteryjunction.com. Price $49.99 from batteryjunction.com, checked Nov 4, 2026; prices change often.
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