Fenix TK15R vs Klarus XT21C size comparison
The Klarus XT21C is 2 mm (0.08 in) shorter than the Fenix TK15R, and 1 mm wider at its widest point. Weights are published on different bases (listed vs with battery), so compare them with care.
The Klarus XT21C is 2 mm (0.08 in) shorter than the Fenix TK15R, and 1 mm wider at its widest point. Weights are published on different bases (listed vs with battery), so compare them with care.
Dimensions
| Fenix TK15R Check price ↗ | Klarus XT21C Check price ↗ | |
| Length | 149 mm (5.87 in) | 147 mm (5.79 in)−2 mm |
| Head / width | 34 mm (1.34 in) | 35 mm (1.38 in)+1 mm |
| Body | 25.4 mm (1.00 in) | 25 mm (0.98 in)−0.4 mm |
| Weight | 205.5 g with battery | 110 g listed |
| Battery | 21700 | 21700 |
| Max output | 3,200 lm | 3,000 lm |
| Throw | 490 m | 324 m |
| Type | Tactical | Tactical |
| Price | $119.95 at fenixlighting.com, as of Nov 4, 2026 | $104.95 at batteryjunction.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced | batteryjunction.com sourced |
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TK15R vs XT21C: how they differ
Size and weight
The Klarus XT21C is the shorter light: 147 mm (5.79 in) against 149 mm (5.87 in), a difference of 2 mm (1%). At its widest point the Fenix TK15R is 1 mm slimmer (34 vs 35 mm). Weights are published on different bases (Fenix TK15R: 205.5 g with battery; Klarus XT21C: 110 g listed), so they are not directly comparable.
Brightness and throw
The Fenix TK15R is rated brighter: 3,200 lm maximum vs 3,000 lm for the Klarus XT21C, 7% more. For beam distance the Fenix TK15R reaches further: 490 m vs 324 m rated throw (51% 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 TK15R was $119.95 at fenixlighting.com and the Klarus XT21C $104.95 at batteryjunction.com, so the Klarus XT21C cost $15.00 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 TK15R if you want longer throw (490 m vs 324 m). On the specs we track, the Fenix TK15R is ahead or level everywhere; the Klarus XT21C 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 TK15R Check price ↗ Klarus XT21C
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TK15R vs XT21C FAQ
Which is smaller, the Fenix TK15R or the Klarus XT21C?
The Klarus XT21C is the shorter light: 147 mm (5.79 in) against 149 mm (5.87 in), a difference of 2 mm (1%). At its widest point the Fenix TK15R is 1 mm slimmer (34 vs 35 mm). Weights are published on different bases (Fenix TK15R: 205.5 g with battery; Klarus XT21C: 110 g listed), so they are not directly comparable.
Which is brighter, the Fenix TK15R or the Klarus XT21C?
The Fenix TK15R is rated brighter: 3,200 lm maximum vs 3,000 lm for the Klarus XT21C, 7% more. For beam distance the Fenix TK15R reaches further: 490 m vs 324 m rated throw (51% more).
Which is cheaper, the Fenix TK15R or the Klarus XT21C?
When we checked on Nov 4, 2026, the Fenix TK15R was $119.95 at fenixlighting.com and the Klarus XT21C $104.95 at batteryjunction.com, so the Klarus XT21C cost $15.00 less. Prices change often, so check the current price before you buy.
Do the Fenix TK15R and Klarus XT21C use the same battery?
Both run on a removable 21700 battery, so spare cells work in either light.
Compare Fenix TK15R with similar lights
Compare Klarus XT21C with similar lights
More
Sources
- Fenix TK15R: specs from Fenix product page (manufacturer). Price $119.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
- Klarus XT21C: specs from manufacturer published specs as listed by batteryjunction.com. Price $104.95 from batteryjunction.com, checked Nov 4, 2026; prices change often.
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