Fenix TK21R size & dimensions
Fenix TK21R shown at true scale next to a credit card. Add another light to compare.
Specs
| Fenix TK21R Check price ↗ | |
| Length | 159.5 mm (6.28 in) |
| Head / width | 36 mm (1.42 in) |
| Body | 25.4 mm (1.00 in) |
| Weight | 221.4 g with battery |
| Battery | One included 6000mAh rechargeable li-ion |
| Max output | 3,600 lm |
| Throw | 480 m |
| Type | Tactical |
| Price | $134.95 at fenixlighting.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced |
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Size in everyday terms
The Fenix TK21R is 159.5 mm (6.28 in) long and 36 mm (1.42 in) across at its widest point. That is about 1.9 times the length of a credit card (85.6 mm), or about 3.2 AA batteries end to end (50.5 mm each). Its widest point is 11.7 mm wider than a US quarter (24.26 mm). Next to a phone the size of an iPhone 15 (147.6 mm tall) it is 108% as long.
How it ranks
Among the 26 tactical lights in our catalog, the Fenix TK21R is the 24th shortest, 4th brightest of 26 with a published output and 4th for throw of 26 with a published beam distance.
Battery, output and weight
The Fenix TK21R runs on its own battery (One included 6000mAh rechargeable li-ion). The manufacturer rates its maximum output at 3,600 lm and its throw at 480 m. Listed weight is 221.4 g (with battery). When we checked on Nov 4, 2026, it was $134.95 at fenixlighting.com.
Featured in: Best tactical flashlights (#4), Best rechargeable flashlights with a built-in battery (#15).
Fenix TK21R vs…
TK21R FAQ
How big is the Fenix TK21R?
The Fenix TK21R is 159.5 mm (6.28 in) long and 36 mm (1.42 in) across at its widest point. That is about 1.9 times the length of a credit card (85.6 mm), or about 3.2 AA batteries end to end (50.5 mm each). Its widest point is 11.7 mm wider than a US quarter (24.26 mm). Next to a phone the size of an iPhone 15 (147.6 mm tall) it is 108% as long.
What battery does the Fenix TK21R use?
The Fenix TK21R runs on its own battery (One included 6000mAh rechargeable li-ion).
How bright is the Fenix TK21R?
The manufacturer rates the Fenix TK21R at 3,600 lm maximum output, with 480 m of throw.
More Fenix lights
See also: Best tactical flashlights
Sources
- Fenix TK21R: specs from Fenix product page (manufacturer). Price $134.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
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