Fenix TK11R vs Klarus XT21C size comparison
The Klarus XT21C is 1.5 mm (0.06 in) longer than the Fenix TK11R, and 1 mm wider at its widest point. Weights are published on different bases (listed vs without battery), so compare them with care.
The Klarus XT21C is 1.5 mm (0.06 in) longer than the Fenix TK11R, and 1 mm wider at its widest point. Weights are published on different bases (listed vs without battery), so compare them with care.
Dimensions
| Fenix TK11R Check price ↗ | Klarus XT21C Check price ↗ | |
| Length | 145.5 mm (5.73 in) | 147 mm (5.79 in)+1.5 mm |
| Head / width | 34 mm (1.34 in) | 35 mm (1.38 in)+1 mm |
| Body | 23.5 mm (0.93 in) | 25 mm (0.98 in)+1.5 mm |
| Weight | 117.5 g without battery | 110 g listed |
| Battery | 18650 / 2x CR123A | 21700 |
| Max output | 1,600 lm | 3,000 lm |
| Throw | 420 m | 324 m |
| Type | Tactical | Tactical |
| Price | $86.95 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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TK11R vs XT21C: how they differ
Size and weight
The Fenix TK11R is the shorter light: 145.5 mm (5.73 in) against 147 mm (5.79 in), a difference of 1.5 mm (1%). At its widest point the Fenix TK11R is 1 mm slimmer (34 vs 35 mm). Weights are published on different bases (Fenix TK11R: 117.5 g without battery; Klarus XT21C: 110 g listed), so they are not directly comparable.
Brightness and throw
The Klarus XT21C is rated brighter: 3,000 lm maximum vs 1,600 lm for the Fenix TK11R, 88% more. For beam distance the Fenix TK11R reaches further: 420 m vs 324 m rated throw (30% more).
Battery
The Fenix TK11R runs on removable 18650 / 2x CR123A batteries; the Klarus XT21C runs on a removable 21700 battery. For scale, a 18650 cell is about 18 × 65 mm and a 21700 about 21 × 70 mm (nominal).
Price
When we checked on Nov 4, 2026, the Fenix TK11R was $86.95 at fenixlighting.com and the Klarus XT21C $104.95 at batteryjunction.com, so the Fenix TK11R cost $18.00 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 TK11R if you want longer throw (420 m vs 324 m). Choose the Klarus XT21C if you want more output (3,000 lm vs 1,600 lm). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix TK11R Check price ↗ Klarus XT21C
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
TK11R vs XT21C FAQ
Which is smaller, the Fenix TK11R or the Klarus XT21C?
The Fenix TK11R is the shorter light: 145.5 mm (5.73 in) against 147 mm (5.79 in), a difference of 1.5 mm (1%). At its widest point the Fenix TK11R is 1 mm slimmer (34 vs 35 mm). Weights are published on different bases (Fenix TK11R: 117.5 g without battery; Klarus XT21C: 110 g listed), so they are not directly comparable.
Which is brighter, the Fenix TK11R or the Klarus XT21C?
The Klarus XT21C is rated brighter: 3,000 lm maximum vs 1,600 lm for the Fenix TK11R, 88% more. For beam distance the Fenix TK11R reaches further: 420 m vs 324 m rated throw (30% more).
Which is cheaper, the Fenix TK11R or the Klarus XT21C?
When we checked on Nov 4, 2026, the Fenix TK11R was $86.95 at fenixlighting.com and the Klarus XT21C $104.95 at batteryjunction.com, so the Fenix TK11R cost $18.00 less. Prices change often, so check the current price before you buy.
Do the Fenix TK11R and Klarus XT21C use the same battery?
The Fenix TK11R runs on removable 18650 / 2x CR123A batteries; the Klarus XT21C runs on a removable 21700 battery. For scale, a 18650 cell is about 18 × 65 mm and a 21700 about 21 × 70 mm (nominal).
Compare Fenix TK11R with similar lights
Compare Klarus XT21C with similar lights
More
Sources
- Fenix TK11R: specs from Fenix product page (manufacturer). Drawing: shape measured from manufacturer photo (batteryjunction.com), scaled to the published length and diameter. Price $86.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
- Klarus XT21C: specs from manufacturer published specs as listed by batteryjunction.com. Drawing: outline from published specs. Price $104.95 from batteryjunction.com, checked Nov 4, 2026; prices change often.
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