Convoy M21B vs ThruNite Archer 2A V3 size comparison
The ThruNite Archer 2A V3 is 13.5 mm (0.53 in) longer than the Convoy M21B, and 13.7 mm narrower at its widest point. Weights are published on different bases (without battery vs listed), so compare them with care.
The ThruNite Archer 2A V3 is 13.5 mm (0.53 in) longer than the Convoy M21B, and 13.7 mm narrower at its widest point. Weights are published on different bases (without battery vs listed), so compare them with care.
Dimensions
| Convoy M21B Check price ↗ | ThruNite Archer 2A V3 Check price ↗ | |
| Length | 141.5 mm (5.57 in) | 155 mm (6.10 in)+13.5 mm |
| Head / width | 35.7 mm (1.41 in) | 22 mm (0.87 in)−13.7 mm |
| Body | 27.1 mm (1.07 in) | 22 mm (0.87 in)−5.1 mm |
| Weight | 120 g listed | 48 g without battery |
| Battery | 21700 | 2x AA |
| Max output | — | 500 lm |
| Throw | — | — |
| Type | EDC | EDC |
| Price | $48.99 at flashlightgo.com, as of Nov 4, 2026 | $29.99 at batteryjunction.com, as of Nov 4, 2026 |
| Source | flashlightgo.com sourced Output depends on LED option | batteryjunction.com sourced |
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M21B vs Archer 2A V3: how they differ
Size and weight
The Convoy M21B is the shorter light: 141.5 mm (5.57 in) against 155 mm (6.10 in), a difference of 13.5 mm (9%). At its widest point the ThruNite Archer 2A V3 is 13.7 mm slimmer (22 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; ThruNite Archer 2A V3: 48 g without battery), so they are not directly comparable.
Brightness and throw
The ThruNite Archer 2A V3 is rated at 500 lm; we have no published maximum for the Convoy M21B. Output for the Convoy M21B depends on the LED option chosen.
Battery
The Convoy M21B runs on a removable 21700 battery; the ThruNite Archer 2A V3 runs on removable 2x AA batteries. For scale, a 21700 cell is about 21 × 70 mm and a AA about 14.5 × 50.5 mm (nominal).
Price
When we checked on Nov 4, 2026, the Convoy M21B was $48.99 at flashlightgo.com and the ThruNite Archer 2A V3 $29.99 at batteryjunction.com, so the ThruNite Archer 2A V3 cost $19.00 less. Prices change often, so check the current price before you buy.
Type
Both are EDC lights in our catalog with a tube body.
Which should you buy?
Choose the Convoy M21B if you want a shorter light (13.5 mm shorter). Choose the ThruNite Archer 2A V3 if you want a slimmer profile (13.7 mm narrower). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Convoy M21B Check price ↗ ThruNite Archer 2A V3
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
M21B vs Archer 2A V3 FAQ
Which is smaller, the Convoy M21B or the ThruNite Archer 2A V3?
The Convoy M21B is the shorter light: 141.5 mm (5.57 in) against 155 mm (6.10 in), a difference of 13.5 mm (9%). At its widest point the ThruNite Archer 2A V3 is 13.7 mm slimmer (22 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; ThruNite Archer 2A V3: 48 g without battery), so they are not directly comparable.
Which is cheaper, the Convoy M21B or the ThruNite Archer 2A V3?
When we checked on Nov 4, 2026, the Convoy M21B was $48.99 at flashlightgo.com and the ThruNite Archer 2A V3 $29.99 at batteryjunction.com, so the ThruNite Archer 2A V3 cost $19.00 less. Prices change often, so check the current price before you buy.
Do the Convoy M21B and ThruNite Archer 2A V3 use the same battery?
The Convoy M21B runs on a removable 21700 battery; the ThruNite Archer 2A V3 runs on removable 2x AA batteries. For scale, a 21700 cell is about 21 × 70 mm and a AA about 14.5 × 50.5 mm (nominal).
Compare Convoy M21B with similar lights
Compare ThruNite Archer 2A V3 with similar lights
More
Sources
- Convoy M21B: specs from manufacturer published specs as listed by flashlightgo.com. Price $48.99 from flashlightgo.com, checked Nov 4, 2026; prices change often.
- ThruNite Archer 2A V3: specs from manufacturer published specs as listed by batteryjunction.com. Price $29.99 from batteryjunction.com, checked Nov 4, 2026; prices change often.
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