Convoy M21B vs Olight Warrior Ultra size comparison
The Olight Warrior Ultra is 1.5 mm (0.06 in) shorter than the Convoy M21B, and 6.7 mm narrower at its widest point. Weights are published on different bases (with battery vs listed), so compare them with care.
The Olight Warrior Ultra is 1.5 mm (0.06 in) shorter than the Convoy M21B, and 6.7 mm narrower at its widest point. Weights are published on different bases (with battery vs listed), so compare them with care.
Dimensions
| Convoy M21B Check price ↗ | Olight Warrior Ultra Check price ↗ | |
| Length | 141.5 mm (5.57 in) | 140 mm (5.51 in)−1.5 mm |
| Head / width | 35.7 mm (1.41 in) | 29 mm (1.14 in)−6.7 mm |
| Body | 27.1 mm (1.07 in) | 29 mm (1.14 in)+1.9 mm |
| Weight | 120 g listed | 178 g with battery |
| Battery | 21700 | 21700 |
| Max output | — | 2,500 lm |
| Throw | — | 320 m |
| Type | EDC | EDC |
| Price | $48.99 at flashlightgo.com, as of Nov 4, 2026 | $139.99 at olight.com, as of Nov 4, 2026 |
| Source | flashlightgo.com sourced Output depends on LED option | olight.com sourced Only body diameter listed |
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M21B vs Warrior Ultra: how they differ
Size and weight
The Olight Warrior Ultra is the shorter light: 140 mm (5.51 in) against 141.5 mm (5.57 in), a difference of 1.5 mm (1%). At its widest point the Olight Warrior Ultra is 6.7 mm slimmer (29 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; Olight Warrior Ultra: 178 g with battery), so they are not directly comparable.
Brightness and throw
The Olight Warrior Ultra is rated at 2,500 lm; we have no published maximum for the Convoy M21B. Output for the Convoy M21B 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 M21B was $48.99 at flashlightgo.com and the Olight Warrior Ultra $139.99 at olight.com, so the Convoy M21B cost $91.00 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 Olight Warrior Ultra if you want a slimmer profile (6.7 mm narrower). On the specs we track, the Olight Warrior Ultra is ahead or level everywhere; the Convoy M21B 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 M21B Check price ↗ Olight Warrior Ultra
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M21B vs Warrior Ultra FAQ
Which is smaller, the Convoy M21B or the Olight Warrior Ultra?
The Olight Warrior Ultra is the shorter light: 140 mm (5.51 in) against 141.5 mm (5.57 in), a difference of 1.5 mm (1%). At its widest point the Olight Warrior Ultra is 6.7 mm slimmer (29 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; Olight Warrior Ultra: 178 g with battery), so they are not directly comparable.
Which is cheaper, the Convoy M21B or the Olight Warrior Ultra?
When we checked on Nov 4, 2026, the Convoy M21B was $48.99 at flashlightgo.com and the Olight Warrior Ultra $139.99 at olight.com, so the Convoy M21B cost $91.00 less. Prices change often, so check the current price before you buy.
Do the Convoy M21B and Olight Warrior Ultra use the same battery?
Both run on a removable 21700 battery, so spare cells work in either light.
Compare Convoy M21B with similar lights
Compare Olight Warrior Ultra with similar lights
More
Sources
- Convoy M21B: specs from manufacturer published specs as listed by flashlightgo.com. Drawing: outline from published specs. Price $48.99 from flashlightgo.com, checked Nov 4, 2026; prices change often.
- Olight Warrior Ultra: specs from Olight product page (manufacturer). Drawing: shape measured from manufacturer photo (olight.com), scaled to the published length and diameter. Price $139.99 from olight.com, checked Nov 4, 2026; prices change often.
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