Convoy M21B vs Fenix TK15R size comparison
The Fenix TK15R is 7.5 mm (0.30 in) longer than the Convoy M21B, and 1.7 mm narrower at its widest point. Weights are published on different bases (with battery vs listed), so compare them with care.
The Fenix TK15R is 7.5 mm (0.30 in) longer than the Convoy M21B, and 1.7 mm narrower at its widest point. Weights are published on different bases (with battery vs listed), so compare them with care.
Dimensions
| Convoy M21B Check price ↗ | Fenix TK15R Check price ↗ | |
| Length | 141.5 mm (5.57 in) | 149 mm (5.87 in)+7.5 mm |
| Head / width | 35.7 mm (1.41 in) | 34 mm (1.34 in)−1.7 mm |
| Body | 27.1 mm (1.07 in) | 25.4 mm (1.00 in)−1.7 mm |
| Weight | 120 g listed | 205.5 g with battery |
| Battery | 21700 | 21700 |
| Max output | — | 3,200 lm |
| Throw | — | 490 m |
| Type | EDC | Tactical |
| Price | $48.99 at flashlightgo.com, as of Nov 4, 2026 | $119.95 at fenixlighting.com, as of Nov 4, 2026 |
| Source | flashlightgo.com sourced Output depends on LED option | fenixlighting.com sourced |
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M21B vs TK15R: how they differ
Size and weight
The Convoy M21B is the shorter light: 141.5 mm (5.57 in) against 149 mm (5.87 in), a difference of 7.5 mm (5%). At its widest point the Fenix TK15R is 1.7 mm slimmer (34 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; Fenix TK15R: 205.5 g with battery), so they are not directly comparable.
Brightness and throw
The Fenix TK15R is rated at 3,200 lm; we have no published maximum for the Convoy M21B. Output for the Convoy M21B depends on the LED option chosen.
Battery
Both run on a removable 21700 battery, so spare cells work in either light.
Price
When we checked on Nov 4, 2026, the Convoy M21B was $48.99 at flashlightgo.com and the Fenix TK15R $119.95 at fenixlighting.com, so the Convoy M21B cost $70.96 less. Prices change often, so check the current price before you buy.
Type
The Convoy M21B is listed as edc and the Fenix TK15R as tactical, so they suit different jobs.
Which should you buy?
Choose the Convoy M21B if you want a shorter light (7.5 mm shorter). Choose the Fenix TK15R if you want a slimmer profile (1.7 mm narrower). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Convoy M21B Check price ↗ Fenix TK15R
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
M21B vs TK15R FAQ
Which is smaller, the Convoy M21B or the Fenix TK15R?
The Convoy M21B is the shorter light: 141.5 mm (5.57 in) against 149 mm (5.87 in), a difference of 7.5 mm (5%). At its widest point the Fenix TK15R is 1.7 mm slimmer (34 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; Fenix TK15R: 205.5 g with battery), so they are not directly comparable.
Which is cheaper, the Convoy M21B or the Fenix TK15R?
When we checked on Nov 4, 2026, the Convoy M21B was $48.99 at flashlightgo.com and the Fenix TK15R $119.95 at fenixlighting.com, so the Convoy M21B cost $70.96 less. Prices change often, so check the current price before you buy.
Do the Convoy M21B and Fenix TK15R use the same battery?
Both run on a removable 21700 battery, so spare cells work in either light.
Compare Convoy M21B with similar lights
Compare Fenix TK15R with similar lights
More
Sources
- Convoy M21B: specs from manufacturer published specs as listed by flashlightgo.com. Drawing: outline from published specs. Price $48.99 from flashlightgo.com, checked Nov 4, 2026; prices change often.
- Fenix TK15R: specs from Fenix product page (manufacturer). Drawing: shape measured from manufacturer photo (fenixlighting.com), scaled to the published length and diameter. Price $119.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
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