Nitecore EDC31 vs Sofirn SC18 size comparison
The Sofirn SC18 is 11.5 mm (0.45 in) shorter than the Nitecore EDC31, and 1.7 mm wider at its widest point. Weights are published on different bases (without battery vs with clip), so compare them with care.
The Sofirn SC18 is 11.5 mm (0.45 in) shorter than the Nitecore EDC31, and 1.7 mm wider at its widest point. Weights are published on different bases (without battery vs with clip), so compare them with care.
Dimensions
| Nitecore EDC31 Check price ↗ | Sofirn SC18 Check price ↗ | |
| Length | 113 mm (4.45 in) | 101.5 mm (4.00 in)−11.5 mm |
| Head / width | 23 mm (0.91 in) | 24.7 mm (0.97 in)+1.7 mm |
| Body | 23 mm (0.91 in) | — |
| Weight | 100 g with clip | 55 g without battery |
| Battery | Built-in | 18650 |
| Max output | 3,500 lm | — |
| Throw | 380 m | — |
| Type | EDC | EDC |
| Price | $54.95 at batteryjunction.com, as of Nov 4, 2026 | from $19.99 at flashlightgo.com, as of Nov 4, 2026 |
| Source | batteryjunction.com sourced Maker page: 4.46 in, head 0.91 in, tube 0.89 in, 3.53 oz with clip | flashlightgo.com sourced Only head diameter listed |
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EDC31 vs SC18: how they differ
Size and weight
The Sofirn SC18 is the shorter light: 101.5 mm (4.00 in) against 113 mm (4.45 in), a difference of 11.5 mm (10%). At its widest point the Nitecore EDC31 is 1.7 mm slimmer (23 vs 24.7 mm). Weights are published on different bases (Nitecore EDC31: 100 g with clip; Sofirn SC18: 55 g without battery), so they are not directly comparable.
Brightness and throw
The Nitecore EDC31 is rated at 3,500 lm; we have no published maximum for the Sofirn SC18.
Battery
The Nitecore EDC31 runs on a built-in rechargeable battery; the Sofirn SC18 runs on a removable 18650 battery. Only the Sofirn SC18 lets you swap in a charged spare.
Price
When we checked on Nov 4, 2026, the Nitecore EDC31 was $54.95 at batteryjunction.com and the Sofirn SC18 from $19.99 at flashlightgo.com, so the Sofirn SC18 cost $34.96 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 Nitecore EDC31 if you want a slimmer profile (1.7 mm narrower) and a built-in battery with no separate cell to buy. Choose the Sofirn SC18 if you want a shorter light (11.5 mm shorter) and a removable cell you can swap. We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Nitecore EDC31 Check price ↗ Sofirn SC18
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EDC31 vs SC18 FAQ
Which is smaller, the Nitecore EDC31 or the Sofirn SC18?
The Sofirn SC18 is the shorter light: 101.5 mm (4.00 in) against 113 mm (4.45 in), a difference of 11.5 mm (10%). At its widest point the Nitecore EDC31 is 1.7 mm slimmer (23 vs 24.7 mm). Weights are published on different bases (Nitecore EDC31: 100 g with clip; Sofirn SC18: 55 g without battery), so they are not directly comparable.
Which is cheaper, the Nitecore EDC31 or the Sofirn SC18?
When we checked on Nov 4, 2026, the Nitecore EDC31 was $54.95 at batteryjunction.com and the Sofirn SC18 from $19.99 at flashlightgo.com, so the Sofirn SC18 cost $34.96 less. Prices change often, so check the current price before you buy.
Do the Nitecore EDC31 and Sofirn SC18 use the same battery?
The Nitecore EDC31 runs on a built-in rechargeable battery; the Sofirn SC18 runs on a removable 18650 battery. Only the Sofirn SC18 lets you swap in a charged spare.
Compare Nitecore EDC31 with similar lights
Compare Sofirn SC18 with similar lights
More
Sources
- Nitecore EDC31: specs from manufacturer published specs as listed by batteryjunction.com. Price $54.95 from batteryjunction.com, checked Nov 4, 2026; prices change often.
- Sofirn SC18: specs from manufacturer published specs as listed by flashlightgo.com. Price from $19.99 from flashlightgo.com, checked Nov 4, 2026; prices change often.
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