Convoy S21E vs Sofirn SC31 Pro size comparison
The Sofirn SC31 Pro is 1.1 mm (0.04 in) longer than the Convoy S21E, and 1.9 mm narrower at its widest point. It is 29 g lighter (without battery).
The Sofirn SC31 Pro is 1.1 mm (0.04 in) longer than the Convoy S21E, and 1.9 mm narrower at its widest point. It is 29 g lighter (without battery).
Dimensions
| Convoy S21E Check price ↗ | Sofirn SC31 Pro Check price ↗ | |
| Length | 116.4 mm (4.58 in) | 117.5 mm (4.63 in)+1.1 mm |
| Head / width | 27.3 mm (1.07 in) | 25.4 mm (1.00 in)−1.9 mm |
| Body | 27.3 mm (1.07 in) | — |
| Weight | 88 g without battery | 59 g without battery−29 g |
| Battery | 21700 | 18650 |
| Max output | — | 2,000 lm |
| Throw | — | — |
| Type | EDC | EDC |
| Price | from $27.99 at flashlightgo.com, as of Nov 4, 2026 | not verified yet |
| Source | flashlightgo.com sourced Output depends on LED option | sofirnlight.com sourced Only head diameter listed |
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S21E vs SC31 Pro: how they differ
Size and weight
The Convoy S21E is the shorter light: 116.4 mm (4.58 in) against 117.5 mm (4.63 in), a difference of 1.1 mm (1%). At its widest point the Sofirn SC31 Pro is 1.9 mm slimmer (25.4 vs 27.3 mm). The Sofirn SC31 Pro is 29 g lighter (59 g vs 88 g, without battery).
Brightness and throw
The Sofirn SC31 Pro is rated at 2,000 lm; we have no published maximum for the Convoy S21E. Output for the Convoy S21E depends on the LED option chosen.
Battery
The Convoy S21E runs on a removable 21700 battery; the Sofirn SC31 Pro runs on a removable 18650 battery. For scale, a 21700 cell is about 21 × 70 mm and a 18650 about 18 × 65 mm (nominal).
Type
Both are EDC lights in our catalog with a tube body.
Which should you buy?
Choose the Sofirn SC31 Pro if you want a slimmer profile (1.9 mm narrower) and less weight (29 g lighter). On the specs we track, the Sofirn SC31 Pro is ahead or level everywhere; the Convoy S21E 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 S21E Check price ↗ Sofirn SC31 Pro
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S21E vs SC31 Pro FAQ
Which is smaller, the Convoy S21E or the Sofirn SC31 Pro?
The Convoy S21E is the shorter light: 116.4 mm (4.58 in) against 117.5 mm (4.63 in), a difference of 1.1 mm (1%). At its widest point the Sofirn SC31 Pro is 1.9 mm slimmer (25.4 vs 27.3 mm). The Sofirn SC31 Pro is 29 g lighter (59 g vs 88 g, without battery).
Do the Convoy S21E and Sofirn SC31 Pro use the same battery?
The Convoy S21E runs on a removable 21700 battery; the Sofirn SC31 Pro 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 S21E with similar lights
Compare Sofirn SC31 Pro with similar lights
More
Sources
- 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.
- Sofirn SC31 Pro: specs from manufacturer published specs as listed by sofirnlight.com. Drawing: outline from published specs. No verified price yet.
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