Convoy S21E vs Emisar D1K size comparison
The Emisar D1K is 2.4 mm (0.09 in) shorter than the Convoy S21E, and 7.7 mm wider at its widest point. It is 1 g heavier (without battery).
The Emisar D1K is 2.4 mm (0.09 in) shorter than the Convoy S21E, and 7.7 mm wider at its widest point. It is 1 g heavier (without battery).
Dimensions
| Convoy S21E Check price ↗ | Emisar D1K Check price ↗ | |
| Length | 116.4 mm (4.58 in) | 114 mm (4.49 in)−2.4 mm |
| Head / width | 27.3 mm (1.07 in) | 35 mm (1.38 in)+7.7 mm |
| Body | 27.3 mm (1.07 in) | 26.5 mm (1.04 in)−0.8 mm |
| Weight | 88 g without battery | 89 g without battery+1 g |
| Battery | 21700 | 21700 |
| Max output | — | 1,200 lm |
| Throw | — | — |
| Type | EDC | EDC |
| Price | from $27.99 at flashlightgo.com, as of Nov 4, 2026 | $39.95 at intl-outdoor.com, as of Nov 4, 2026 |
| Source | flashlightgo.com sourced Output depends on LED option | intl-outdoor.com sourced Pocket thrower; lumens for SFT-25 |
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S21E vs D1K: how they differ
Size and weight
The Emisar D1K is the shorter light: 114 mm (4.49 in) against 116.4 mm (4.58 in), a difference of 2.4 mm (2%). At its widest point the Convoy S21E is 7.7 mm slimmer (27.3 vs 35 mm). The Convoy S21E is 1 g lighter (88 g vs 89 g, without battery).
Brightness and throw
The Emisar D1K is rated at 1,200 lm; we have no published maximum for the Convoy S21E. Output for the 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 S21E was from $27.99 at flashlightgo.com and the Emisar D1K $39.95 at intl-outdoor.com, so the Convoy S21E cost $11.96 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 slimmer profile (7.7 mm narrower). On the specs we track, the Convoy S21E is ahead or level everywhere; the Emisar D1K 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 ↗ Emisar D1K
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S21E vs D1K FAQ
Which is smaller, the Convoy S21E or the Emisar D1K?
The Emisar D1K is the shorter light: 114 mm (4.49 in) against 116.4 mm (4.58 in), a difference of 2.4 mm (2%). At its widest point the Convoy S21E is 7.7 mm slimmer (27.3 vs 35 mm). The Convoy S21E is 1 g lighter (88 g vs 89 g, without battery).
Which is cheaper, the Convoy S21E or the Emisar D1K?
When we checked on Nov 4, 2026, the Convoy S21E was from $27.99 at flashlightgo.com and the Emisar D1K $39.95 at intl-outdoor.com, so the Convoy S21E cost $11.96 less. Prices change often, so check the current price before you buy.
Do the Convoy S21E and Emisar D1K use the same battery?
Both run on a removable 21700 battery, so spare cells work in either light.
Compare Convoy S21E with similar lights
Compare Emisar D1K with similar lights
More
Sources
- Convoy S21E: specs from manufacturer published specs as listed by flashlightgo.com. Price from $27.99 from flashlightgo.com, checked Nov 4, 2026; prices change often.
- Emisar D1K: specs from Emisar product page (manufacturer). Price $39.95 from intl-outdoor.com, checked Nov 4, 2026; prices change often.
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