Fenix TK17 vs Fenix TK20R V2.0 size comparison
The Fenix TK20R V2.0 is 4.5 mm (0.18 in) longer than the Fenix TK17, and 2 mm narrower at its widest point. It is 7 g heavier (with battery).
The Fenix TK20R V2.0 is 4.5 mm (0.18 in) longer than the Fenix TK17, and 2 mm narrower at its widest point. It is 7 g heavier (with battery).
Dimensions
| Fenix TK17 Check price ↗ | Fenix TK20R V2.0 Check price ↗ | |
| Length | 148.5 mm (5.85 in) | 153 mm (6.02 in)+4.5 mm |
| Head / width | 36 mm (1.42 in) | 34 mm (1.34 in)−2 mm |
| Body | 25.4 mm (1.00 in) | 25.4 mm (1.00 in)same |
| Weight | 197.2 g with battery | 204 g with battery+7 g |
| Battery | One included 6000mAh rechargeable li-ion | 21700 |
| Max output | 3,600 lm | 3,000 lm |
| Throw | 330 m | 475 m |
| Type | Tactical | Tactical |
| Price | $104.95 at fenixlighting.com, as of Nov 4, 2026 | $129.95 at fenixlighting.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced | fenixlighting.com sourced |
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TK17 vs TK20R V2.0: how they differ
Size and weight
The Fenix TK17 is the shorter light: 148.5 mm (5.85 in) against 153 mm (6.02 in), a difference of 4.5 mm (3%). At its widest point the Fenix TK20R V2.0 is 2 mm slimmer (34 vs 36 mm). The Fenix TK17 is 7 g lighter (197.2 g vs 204 g, with battery).
Brightness and throw
The Fenix TK17 is rated brighter: 3,600 lm maximum vs 3,000 lm for the Fenix TK20R V2.0, 20% more. For beam distance the Fenix TK20R V2.0 reaches further: 475 m vs 330 m rated throw (44% more).
Battery
The Fenix TK17 runs on its own battery (One included 6000mAh rechargeable li-ion); the Fenix TK20R V2.0 runs on a removable 21700 battery.
Price
When we checked on Nov 4, 2026, the Fenix TK17 was $104.95 at fenixlighting.com and the Fenix TK20R V2.0 $129.95 at fenixlighting.com, so the Fenix TK17 cost $25.00 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 TK17 if you want a shorter light (4.5 mm shorter) and more output (3,600 lm vs 3,000 lm). Choose the Fenix TK20R V2.0 if you want a slimmer profile (2 mm narrower) and longer throw (475 m vs 330 m). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix TK17 Check price ↗ Fenix TK20R V2.0
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
TK17 vs TK20R V2.0 FAQ
Which is smaller, the Fenix TK17 or the Fenix TK20R V2.0?
The Fenix TK17 is the shorter light: 148.5 mm (5.85 in) against 153 mm (6.02 in), a difference of 4.5 mm (3%). At its widest point the Fenix TK20R V2.0 is 2 mm slimmer (34 vs 36 mm). The Fenix TK17 is 7 g lighter (197.2 g vs 204 g, with battery).
Which is brighter, the Fenix TK17 or the Fenix TK20R V2.0?
The Fenix TK17 is rated brighter: 3,600 lm maximum vs 3,000 lm for the Fenix TK20R V2.0, 20% more. For beam distance the Fenix TK20R V2.0 reaches further: 475 m vs 330 m rated throw (44% more).
Which is cheaper, the Fenix TK17 or the Fenix TK20R V2.0?
When we checked on Nov 4, 2026, the Fenix TK17 was $104.95 at fenixlighting.com and the Fenix TK20R V2.0 $129.95 at fenixlighting.com, so the Fenix TK17 cost $25.00 less. Prices change often, so check the current price before you buy.
Do the Fenix TK17 and Fenix TK20R V2.0 use the same battery?
The Fenix TK17 runs on its own battery (One included 6000mAh rechargeable li-ion); the Fenix TK20R V2.0 runs on a removable 21700 battery.
Compare Fenix TK17 with similar lights
Compare Fenix TK20R V2.0 with similar lights
More
Sources
- Fenix TK17: specs from Fenix product page (manufacturer). Price $104.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
- Fenix TK20R V2.0: specs from Fenix product page (manufacturer). Price $129.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
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