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 |
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
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
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
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.
Found an error? Email [email protected] and we will fix it.