Convoy M21B vs Fenix PD45R ACE size comparison
The Fenix PD45R ACE is 16.2 mm (0.64 in) longer than the Convoy M21B, and 5.7 mm narrower at its widest point. Weights are published on different bases (with battery vs listed), so compare them with care.
Fenix PD45R ACE: Photo: Fenix · Image policy
The Fenix PD45R ACE is 16.2 mm (0.64 in) longer than the Convoy M21B, and 5.7 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 ↗ | Fenix PD45R ACE Check price ↗ | |
| Length | 141.5 mm (5.57 in) | 157.7 mm (6.21 in)+16.2 mm |
| Head / width | 35.7 mm (1.41 in) | 30 mm (1.18 in)−5.7 mm |
| Body | 27.1 mm (1.07 in) | 25.9 mm (1.02 in)−1.2 mm |
| Weight | 120 g listed | 200.5 g with battery |
| Battery | 21700 | 21700 |
| Max output | — | 3,200 lm |
| Throw | — | 410 m |
| Type | EDC | EDC |
| Price | $48.99 at flashlightgo.com, as of Nov 4, 2026 | $129.95 at fenixlighting.com, as of Nov 4, 2026 |
| Source | flashlightgo.com sourced Output depends on LED option | fenixlighting.com sourced Listed 30 mm wide x 25.9 mm high |
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M21B vs PD45R ACE: how they differ
Size and weight
The Convoy M21B is the shorter light: 141.5 mm (5.57 in) against 157.7 mm (6.21 in), a difference of 16.2 mm (10%). At its widest point the Fenix PD45R ACE is 5.7 mm slimmer (30 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; Fenix PD45R ACE: 200.5 g with battery), so they are not directly comparable.
Brightness and throw
The Fenix PD45R ACE is rated at 3,200 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 Fenix PD45R ACE $129.95 at fenixlighting.com, so the Convoy M21B cost $80.96 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 Convoy M21B if you want a shorter light (16.2 mm shorter). Choose the Fenix PD45R ACE if you want a slimmer profile (5.7 mm narrower). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Convoy M21B Check price ↗ Fenix PD45R ACE
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M21B vs PD45R ACE FAQ
Which is smaller, the Convoy M21B or the Fenix PD45R ACE?
The Convoy M21B is the shorter light: 141.5 mm (5.57 in) against 157.7 mm (6.21 in), a difference of 16.2 mm (10%). At its widest point the Fenix PD45R ACE is 5.7 mm slimmer (30 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; Fenix PD45R ACE: 200.5 g with battery), so they are not directly comparable.
Which is cheaper, the Convoy M21B or the Fenix PD45R ACE?
When we checked on Nov 4, 2026, the Convoy M21B was $48.99 at flashlightgo.com and the Fenix PD45R ACE $129.95 at fenixlighting.com, so the Convoy M21B cost $80.96 less. Prices change often, so check the current price before you buy.
Do the Convoy M21B and Fenix PD45R ACE 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 Fenix PD45R ACE 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.
- Fenix PD45R ACE: specs from Fenix product page (manufacturer). Photo from manufacturer: the maker's own product photo with the background removed, scaled to the published length and diameter (Photo: Fenix; image policy). Price $129.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
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