Emisar D4K vs Fenix LD31 RENEGADE size comparison
The Fenix LD31 RENEGADE is 23.4 mm (0.92 in) longer than the Emisar D4K, and 1.5 mm narrower at its widest point. Weights are published on different bases (with battery vs without battery), so compare them with care.
The Fenix LD31 RENEGADE is 23.4 mm (0.92 in) longer than the Emisar D4K, and 1.5 mm narrower at its widest point. Weights are published on different bases (with battery vs without battery), so compare them with care.
Dimensions
| Emisar D4K Check price ↗ | Fenix LD31 RENEGADE Check price ↗ | |
| Length | 103 mm (4.06 in) | 126.4 mm (4.98 in)+23.4 mm |
| Head / width | 28 mm (1.10 in) | 26.5 mm (1.04 in)−1.5 mm |
| Body | 26.5 mm (1.04 in) | 25.6 mm (1.01 in)−0.9 mm |
| Weight | 58 g without battery | 164 g with battery |
| Battery | 21700 | 21700 |
| Max output | — | 3,200 lm |
| Throw | — | 355 m |
| Type | EDC | EDC |
| Price | $39.69 at intl-outdoor.com, as of Nov 4, 2026 | $99.95 at fenixlighting.com, as of Nov 4, 2026 |
| Source | intl-outdoor.com sourced Output depends on LED option | fenixlighting.com sourced Listed 26.5 mm wide x 25.6 mm high |
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D4K vs LD31 RENEGADE: how they differ
Size and weight
The Emisar D4K is the shorter light: 103 mm (4.06 in) against 126.4 mm (4.98 in), a difference of 23.4 mm (19%). At its widest point the Fenix LD31 RENEGADE is 1.5 mm slimmer (26.5 vs 28 mm). Weights are published on different bases (Emisar D4K: 58 g without battery; Fenix LD31 RENEGADE: 164 g with battery), so they are not directly comparable.
Brightness and throw
The Fenix LD31 RENEGADE is rated at 3,200 lm; we have no published maximum for the Emisar D4K. Output for the Emisar D4K 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 Emisar D4K was $39.69 at intl-outdoor.com and the Fenix LD31 RENEGADE $99.95 at fenixlighting.com, so the Emisar D4K cost $60.26 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 Emisar D4K if you want a shorter light (23.4 mm shorter). Choose the Fenix LD31 RENEGADE if you want a slimmer profile (1.5 mm narrower). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Emisar D4K Check price ↗ Fenix LD31 RENEGADE
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D4K vs LD31 RENEGADE FAQ
Which is smaller, the Emisar D4K or the Fenix LD31 RENEGADE?
The Emisar D4K is the shorter light: 103 mm (4.06 in) against 126.4 mm (4.98 in), a difference of 23.4 mm (19%). At its widest point the Fenix LD31 RENEGADE is 1.5 mm slimmer (26.5 vs 28 mm). Weights are published on different bases (Emisar D4K: 58 g without battery; Fenix LD31 RENEGADE: 164 g with battery), so they are not directly comparable.
Which is cheaper, the Emisar D4K or the Fenix LD31 RENEGADE?
When we checked on Nov 4, 2026, the Emisar D4K was $39.69 at intl-outdoor.com and the Fenix LD31 RENEGADE $99.95 at fenixlighting.com, so the Emisar D4K cost $60.26 less. Prices change often, so check the current price before you buy.
Do the Emisar D4K and Fenix LD31 RENEGADE use the same battery?
Both run on a removable 21700 battery, so spare cells work in either light.
Compare Emisar D4K with similar lights
Compare Fenix LD31 RENEGADE with similar lights
More
Sources
- Emisar D4K: specs from Emisar product page (manufacturer). Price $39.69 from intl-outdoor.com, checked Nov 4, 2026; prices change often.
- Fenix LD31 RENEGADE: specs from Fenix product page (manufacturer). Price $99.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
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