Convoy M21B vs Convoy S21E size comparison
The Convoy S21E is 25.1 mm (0.99 in) shorter than the Convoy M21B, and 8.4 mm narrower at its widest point. Weights are published on different bases (without battery vs listed), so compare them with care.
The Convoy S21E is 25.1 mm (0.99 in) shorter than the Convoy M21B, and 8.4 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 ↗ | Convoy S21E Check price ↗ | |
| Length | 141.5 mm (5.57 in) | 116.4 mm (4.58 in)−25.1 mm |
| Head / width | 35.7 mm (1.41 in) | 27.3 mm (1.07 in)−8.4 mm |
| Body | 27.1 mm (1.07 in) | 27.3 mm (1.07 in)+0.2 mm |
| Weight | 120 g listed | 88 g without battery |
| Battery | 21700 | 21700 |
| Max output | — | — |
| Throw | — | — |
| Type | EDC | EDC |
| Price | $48.99 at flashlightgo.com, as of Nov 4, 2026 | from $27.99 at flashlightgo.com, as of Nov 4, 2026 |
| Source | flashlightgo.com sourced Output depends on LED option | flashlightgo.com sourced Output depends on LED option |
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M21B vs S21E: how they differ
Size and weight
The Convoy S21E is the shorter light: 116.4 mm (4.58 in) against 141.5 mm (5.57 in), a difference of 25.1 mm (18%). At its widest point the Convoy S21E is 8.4 mm slimmer (27.3 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; Convoy S21E: 88 g without battery), so they are not directly comparable.
Brightness and throw
Output for the Convoy M21B and Convoy S21E 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 Convoy S21E from $27.99 at flashlightgo.com, so the Convoy S21E cost $21.00 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 S21E if you want a shorter light (25.1 mm shorter) and a slimmer profile (8.4 mm narrower). On the specs we track, the Convoy S21E is ahead or level everywhere; the Convoy M21B 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 ↗ Convoy M21B Check price ↗ Convoy S21E
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
M21B vs S21E FAQ
Which is smaller, the Convoy M21B or the Convoy S21E?
The Convoy S21E is the shorter light: 116.4 mm (4.58 in) against 141.5 mm (5.57 in), a difference of 25.1 mm (18%). At its widest point the Convoy S21E is 8.4 mm slimmer (27.3 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; Convoy S21E: 88 g without battery), so they are not directly comparable.
Which is cheaper, the Convoy M21B or the Convoy S21E?
When we checked on Nov 4, 2026, the Convoy M21B was $48.99 at flashlightgo.com and the Convoy S21E from $27.99 at flashlightgo.com, so the Convoy S21E cost $21.00 less. Prices change often, so check the current price before you buy.
Do the Convoy M21B and Convoy S21E 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 Convoy S21E 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.
- Convoy S21E: specs from manufacturer published specs as listed by flashlightgo.com. Drawing: outline from published specs. Price from $27.99 from flashlightgo.com, checked Nov 4, 2026; prices change often.
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