Emisar D4K vs Fenix E20 V2.0 AA size comparison
The Fenix E20 V2.0 AA is 24 mm (0.94 in) longer than the Emisar D4K, and 7 mm narrower at its widest point. It is 16 g lighter (without battery).
The Fenix E20 V2.0 AA is 24 mm (0.94 in) longer than the Emisar D4K, and 7 mm narrower at its widest point. It is 16 g lighter (without battery).
Dimensions
| Emisar D4K Check price ↗ | Fenix E20 V2.0 AA Check price ↗ | |
| Length | 103 mm (4.06 in) | 127 mm (5.00 in)+24 mm |
| Head / width | 28 mm (1.10 in) | 21 mm (0.83 in)−7 mm |
| Body | 26.5 mm (1.04 in) | 16.8 mm (0.66 in)−9.7 mm |
| Weight | 58 g without battery | 42 g without battery−16 g |
| Battery | 21700 | 2x AA |
| Max output | — | 350 lm |
| Throw | — | 126 m |
| Type | EDC | EDC |
| Price | $39.69 at intl-outdoor.com, as of Nov 4, 2026 | $44.95 at fenixlighting.com, as of Nov 4, 2026 |
| Source | intl-outdoor.com sourced Output depends on LED option | fenixlighting.com sourced |
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D4K vs E20 V2.0 AA: how they differ
Size and weight
The Emisar D4K is the shorter light: 103 mm (4.06 in) against 127 mm (5.00 in), a difference of 24 mm (19%). At its widest point the Fenix E20 V2.0 AA is 7 mm slimmer (21 vs 28 mm). The Fenix E20 V2.0 AA is 16 g lighter (42 g vs 58 g, without battery).
Brightness and throw
The Fenix E20 V2.0 AA is rated at 350 lm; we have no published maximum for the Emisar D4K. Output for the Emisar D4K depends on the LED option chosen.
Battery
The Emisar D4K runs on a removable 21700 battery; the Fenix E20 V2.0 AA runs on removable 2x AA batteries. For scale, a 21700 cell is about 21 × 70 mm and a AA about 14.5 × 50.5 mm (nominal).
Price
When we checked on Nov 4, 2026, the Emisar D4K was $39.69 at intl-outdoor.com and the Fenix E20 V2.0 AA $44.95 at fenixlighting.com, so the Emisar D4K cost $5.26 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 (24 mm shorter). Choose the Fenix E20 V2.0 AA if you want a slimmer profile (7 mm narrower) and less weight (16 g lighter). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Emisar D4K Check price ↗ Fenix E20 V2.0 AA
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D4K vs E20 V2.0 AA FAQ
Which is smaller, the Emisar D4K or the Fenix E20 V2.0 AA?
The Emisar D4K is the shorter light: 103 mm (4.06 in) against 127 mm (5.00 in), a difference of 24 mm (19%). At its widest point the Fenix E20 V2.0 AA is 7 mm slimmer (21 vs 28 mm). The Fenix E20 V2.0 AA is 16 g lighter (42 g vs 58 g, without battery).
Which is cheaper, the Emisar D4K or the Fenix E20 V2.0 AA?
When we checked on Nov 4, 2026, the Emisar D4K was $39.69 at intl-outdoor.com and the Fenix E20 V2.0 AA $44.95 at fenixlighting.com, so the Emisar D4K cost $5.26 less. Prices change often, so check the current price before you buy.
Do the Emisar D4K and Fenix E20 V2.0 AA use the same battery?
The Emisar D4K runs on a removable 21700 battery; the Fenix E20 V2.0 AA runs on removable 2x AA batteries. For scale, a 21700 cell is about 21 × 70 mm and a AA about 14.5 × 50.5 mm (nominal).
Compare Emisar D4K with similar lights
Compare Fenix E20 V2.0 AA 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 E20 V2.0 AA: specs from Fenix product page (manufacturer). Price $44.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
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