Convoy M21H vs Streamlight ProTac 2L-X USB size comparison
The Streamlight ProTac 2L-X USB is about the same length as the Convoy M21H, and 13.1 mm narrower at its widest point.
The Streamlight ProTac 2L-X USB is about the same length as the Convoy M21H, and 13.1 mm narrower at its widest point.
Dimensions
| Convoy M21H Check price ↗ | Streamlight ProTac 2L-X USB Check price ↗ | |
| Length | 130.8 mm (5.15 in) | 130.6 mm (5.14 in)−0.3 mm |
| Head / width | 40 mm (1.57 in) | 26.9 mm (1.06 in)−13.1 mm |
| Body | 27 mm (1.06 in) | 23.9 mm (0.94 in)−3.1 mm |
| Tail | 28.5 mm (1.12 in) | — |
| Weight | — | 125 g with battery |
| Battery | 21700 | 18650 / 2x CR123A |
| Max output | — | 500 lm |
| Throw | — | — |
| Type | EDC | EDC |
| Price | from $44.95 at nealsgadgets.com, as of Nov 4, 2026 | $83.05 at batteryjunction.com, as of Nov 4, 2026 |
| Source | nealsgadgets.com sourced | batteryjunction.com sourced |
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M21H vs ProTac 2L-X USB: how they differ
Size and weight
The Convoy M21H and Streamlight ProTac 2L-X USB are the same length to within half a millimetre (130.8 mm (5.15 in)). At its widest point the Streamlight ProTac 2L-X USB is 13.1 mm slimmer (26.9 vs 40 mm).
Brightness and throw
The Streamlight ProTac 2L-X USB is rated at 500 lm; we have no published maximum for the Convoy M21H.
Battery
The Convoy M21H runs on a removable 21700 battery; the Streamlight ProTac 2L-X USB runs on removable 18650 / 2x CR123A batteries. 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 Convoy M21H was from $44.95 at nealsgadgets.com and the Streamlight ProTac 2L-X USB $83.05 at batteryjunction.com, so the Convoy M21H cost $38.10 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 Streamlight ProTac 2L-X USB if you want a slimmer profile (13.1 mm narrower). On the specs we track, the Streamlight ProTac 2L-X USB is ahead or level everywhere; the Convoy M21H 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 M21H Check price ↗ Streamlight ProTac 2L-X USB
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
M21H vs ProTac 2L-X USB FAQ
Which is smaller, the Convoy M21H or the Streamlight ProTac 2L-X USB?
The Convoy M21H and Streamlight ProTac 2L-X USB are the same length to within half a millimetre (130.8 mm (5.15 in)). At its widest point the Streamlight ProTac 2L-X USB is 13.1 mm slimmer (26.9 vs 40 mm).
Which is cheaper, the Convoy M21H or the Streamlight ProTac 2L-X USB?
When we checked on Nov 4, 2026, the Convoy M21H was from $44.95 at nealsgadgets.com and the Streamlight ProTac 2L-X USB $83.05 at batteryjunction.com, so the Convoy M21H cost $38.10 less. Prices change often, so check the current price before you buy.
Do the Convoy M21H and Streamlight ProTac 2L-X USB use the same battery?
The Convoy M21H runs on a removable 21700 battery; the Streamlight ProTac 2L-X USB runs on removable 18650 / 2x CR123A batteries. For scale, a 21700 cell is about 21 × 70 mm and a 18650 about 18 × 65 mm (nominal).
Compare Convoy M21H with similar lights
Compare Streamlight ProTac 2L-X USB with similar lights
More
Sources
- Convoy M21H: specs from manufacturer published specs as listed by nealsgadgets.com. Drawing: outline from published specs. Price from $44.95 from nealsgadgets.com, checked Nov 4, 2026; prices change often.
- Streamlight ProTac 2L-X USB: specs from manufacturer published specs as listed by batteryjunction.com. Drawing: outline from published specs. Price $83.05 from batteryjunction.com, checked Nov 4, 2026; prices change often.
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