Emisar D4K vs Olight Baton 4 Pro size comparison
The Olight Baton 4 Pro is 8 mm (0.31 in) longer than the Emisar D4K, and 5 mm narrower at its widest point. Weights are published on different bases (with battery vs without battery), so compare them with care.
The Olight Baton 4 Pro is 8 mm (0.31 in) longer than the Emisar D4K, and 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 ↗ | Olight Baton 4 Pro Check price ↗ | |
| Length | 103 mm (4.06 in) | 111 mm (4.37 in)+8 mm |
| Head / width | 28 mm (1.10 in) | 23 mm (0.91 in)−5 mm |
| Body | 26.5 mm (1.04 in) | 23 mm (0.91 in)−3.5 mm |
| Weight | 58 g without battery | 114 g with battery |
| Battery | 21700 | 18650 |
| Max output | — | 1,600 lm |
| Throw | — | 200 m |
| Type | EDC | EDC |
| Price | $39.69 at intl-outdoor.com, as of Nov 4, 2026 | $69.99 at olight.com, as of Nov 4, 2026 |
| Source | intl-outdoor.com sourced Output depends on LED option | olight.com sourced Length and diameter from Battery Junction spec table; weight/output from olight.com |
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D4K vs Baton 4 Pro: how they differ
Size and weight
The Emisar D4K is the shorter light: 103 mm (4.06 in) against 111 mm (4.37 in), a difference of 8 mm (7%). At its widest point the Olight Baton 4 Pro is 5 mm slimmer (23 vs 28 mm). Weights are published on different bases (Emisar D4K: 58 g without battery; Olight Baton 4 Pro: 114 g with battery), so they are not directly comparable.
Brightness and throw
The Olight Baton 4 Pro is rated at 1,600 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 Olight Baton 4 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).
Price
When we checked on Nov 4, 2026, the Emisar D4K was $39.69 at intl-outdoor.com and the Olight Baton 4 Pro $69.99 at olight.com, so the Emisar D4K cost $30.30 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 (8 mm shorter). Choose the Olight Baton 4 Pro if you want a slimmer profile (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 ↗ Olight Baton 4 Pro
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
D4K vs Baton 4 Pro FAQ
Which is smaller, the Emisar D4K or the Olight Baton 4 Pro?
The Emisar D4K is the shorter light: 103 mm (4.06 in) against 111 mm (4.37 in), a difference of 8 mm (7%). At its widest point the Olight Baton 4 Pro is 5 mm slimmer (23 vs 28 mm). Weights are published on different bases (Emisar D4K: 58 g without battery; Olight Baton 4 Pro: 114 g with battery), so they are not directly comparable.
Which is cheaper, the Emisar D4K or the Olight Baton 4 Pro?
When we checked on Nov 4, 2026, the Emisar D4K was $39.69 at intl-outdoor.com and the Olight Baton 4 Pro $69.99 at olight.com, so the Emisar D4K cost $30.30 less. Prices change often, so check the current price before you buy.
Do the Emisar D4K and Olight Baton 4 Pro use the same battery?
The Emisar D4K runs on a removable 21700 battery; the Olight Baton 4 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 Emisar D4K with similar lights
Compare Olight Baton 4 Pro 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.
- Olight Baton 4 Pro: specs from Olight product page (manufacturer). Price $69.99 from olight.com, checked Nov 4, 2026; prices change often.
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