Convoy M21B vs Convoy S2+ size comparison
The Convoy S2+ is 23.5 mm (0.93 in) shorter than the Convoy M21B, and 11.6 mm narrower at its widest point. Weights are published on different bases (without battery vs listed), so compare them with care.
The Convoy S2+ is 23.5 mm (0.93 in) shorter than the Convoy M21B, and 11.6 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 S2+ Check price ↗ | |
| Length | 141.5 mm (5.57 in) | 118 mm (4.65 in)−23.5 mm |
| Head / width | 35.7 mm (1.41 in) | 24.1 mm (0.95 in)−11.6 mm |
| Body | 27.1 mm (1.07 in) | 24.1 mm (0.95 in)−3 mm |
| Weight | 120 g listed | 76 g without battery |
| Battery | 21700 | 18650 |
| Max output | — | — |
| Throw | — | — |
| Type | EDC | EDC |
| Price | $48.99 at flashlightgo.com, as of Nov 4, 2026 | from $11.46 at convoylight.com, as of Nov 4, 2026 |
| Source | flashlightgo.com sourced Output depends on LED option | convoylight.com sourced Output depends on LED option |
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M21B vs S2+: how they differ
Size and weight
The Convoy S2+ is the shorter light: 118 mm (4.65 in) against 141.5 mm (5.57 in), a difference of 23.5 mm (17%). At its widest point the Convoy S2+ is 11.6 mm slimmer (24.1 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; Convoy S2+: 76 g without battery), so they are not directly comparable.
Brightness and throw
Output for the Convoy M21B and Convoy S2+ depends on the LED option chosen.
Battery
The Convoy M21B runs on a removable 21700 battery; the Convoy S2+ runs on a removable 18650 battery. For scale, a 21700 cell is about 21 × 70 mm and a 18650 about 18 × 65 mm (nominal).
Price
When we checked on Nov 4, 2026, the Convoy M21B was $48.99 at flashlightgo.com and the Convoy S2+ from $11.46 at convoylight.com, so the Convoy S2+ cost $37.53 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 S2+ if you want a shorter light (23.5 mm shorter) and a slimmer profile (11.6 mm narrower). On the specs we track, the Convoy S2+ 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 S2+
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
M21B vs S2+ FAQ
Which is smaller, the Convoy M21B or the Convoy S2+?
The Convoy S2+ is the shorter light: 118 mm (4.65 in) against 141.5 mm (5.57 in), a difference of 23.5 mm (17%). At its widest point the Convoy S2+ is 11.6 mm slimmer (24.1 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; Convoy S2+: 76 g without battery), so they are not directly comparable.
Which is cheaper, the Convoy M21B or the Convoy S2+?
When we checked on Nov 4, 2026, the Convoy M21B was $48.99 at flashlightgo.com and the Convoy S2+ from $11.46 at convoylight.com, so the Convoy S2+ cost $37.53 less. Prices change often, so check the current price before you buy.
Do the Convoy M21B and Convoy S2+ use the same battery?
The Convoy M21B runs on a removable 21700 battery; the Convoy S2+ runs on a removable 18650 battery. For scale, a 21700 cell is about 21 × 70 mm and a 18650 about 18 × 65 mm (nominal).
Compare Convoy M21B with similar lights
Compare Convoy S2+ 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.
- Convoy S2+: specs from manufacturer published specs as listed by convoylight.com. Price from $11.46 from convoylight.com, checked Nov 4, 2026; prices change often.
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