Convoy M21B vs Fenix PD35R ACE size comparison
The Fenix PD35R ACE is 1 mm (0.04 in) shorter than the Convoy M21B, and 9.2 mm narrower at its widest point. Weights are published on different bases (with battery vs listed), so compare them with care.
The Fenix PD35R ACE is 1 mm (0.04 in) shorter than the Convoy M21B, and 9.2 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 PD35R ACE Check price ↗ | |
| Length | 141.5 mm (5.57 in) | 140.5 mm (5.53 in)−1 mm |
| Head / width | 35.7 mm (1.41 in) | 26.5 mm (1.04 in)−9.2 mm |
| Body | 27.1 mm (1.07 in) | 23.6 mm (0.93 in)−3.5 mm |
| Weight | 120 g listed | 145 g with battery |
| Battery | 21700 | CR123A |
| Max output | — | 2,000 lm |
| Throw | — | 380 m |
| Type | EDC | EDC |
| Price | $48.99 at flashlightgo.com, as of Nov 4, 2026 | $85.95 at fenixlighting.com, as of Nov 4, 2026 |
| Source | flashlightgo.com sourced Output depends on LED option | fenixlighting.com sourced |
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M21B vs PD35R ACE: how they differ
Size and weight
The Fenix PD35R ACE is the shorter light: 140.5 mm (5.53 in) against 141.5 mm (5.57 in), a difference of 1 mm (1%). At its widest point the Fenix PD35R ACE is 9.2 mm slimmer (26.5 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; Fenix PD35R ACE: 145 g with battery), so they are not directly comparable.
Brightness and throw
The Fenix PD35R ACE is rated at 2,000 lm; we have no published maximum for the Convoy M21B. Output for the Convoy M21B depends on the LED option chosen.
Battery
The Convoy M21B runs on a removable 21700 battery; the Fenix PD35R ACE runs on a removable CR123A battery. For scale, a 21700 cell is about 21 × 70 mm and a CR123A about 17 × 34.5 mm (nominal).
Price
When we checked on Nov 4, 2026, the Convoy M21B was $48.99 at flashlightgo.com and the Fenix PD35R ACE $85.95 at fenixlighting.com, so the Convoy M21B cost $36.96 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 Fenix PD35R ACE if you want a slimmer profile (9.2 mm narrower). On the specs we track, the Fenix PD35R ACE 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 ↗ Fenix PD35R ACE
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M21B vs PD35R ACE FAQ
Which is smaller, the Convoy M21B or the Fenix PD35R ACE?
The Fenix PD35R ACE is the shorter light: 140.5 mm (5.53 in) against 141.5 mm (5.57 in), a difference of 1 mm (1%). At its widest point the Fenix PD35R ACE is 9.2 mm slimmer (26.5 vs 35.7 mm). Weights are published on different bases (Convoy M21B: 120 g listed; Fenix PD35R ACE: 145 g with battery), so they are not directly comparable.
Which is cheaper, the Convoy M21B or the Fenix PD35R ACE?
When we checked on Nov 4, 2026, the Convoy M21B was $48.99 at flashlightgo.com and the Fenix PD35R ACE $85.95 at fenixlighting.com, so the Convoy M21B cost $36.96 less. Prices change often, so check the current price before you buy.
Do the Convoy M21B and Fenix PD35R ACE use the same battery?
The Convoy M21B runs on a removable 21700 battery; the Fenix PD35R ACE runs on a removable CR123A battery. For scale, a 21700 cell is about 21 × 70 mm and a CR123A about 17 × 34.5 mm (nominal).
Compare Convoy M21B with similar lights
Compare Fenix PD35R 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 PD35R ACE: specs from Fenix product page (manufacturer). Drawing: shape measured from manufacturer photo (batteryjunction.com), scaled to the published length and diameter. Price $85.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
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