Acebeam Defender P16 vs Fenix LD45R size comparison
The Fenix LD45R is 24.3 mm (0.96 in) longer than the Acebeam Defender P16, and 12.5 mm wider at its widest point. Weights are published on different bases (with battery vs listed), so compare them with care.
The Fenix LD45R is 24.3 mm (0.96 in) longer than the Acebeam Defender P16, and 12.5 mm wider at its widest point. Weights are published on different bases (with battery vs listed), so compare them with care.
Dimensions
| Acebeam Defender P16 Check price ↗ | Fenix LD45R Check price ↗ | |
| Length | 131 mm (5.16 in) | 155.3 mm (6.11 in)+24.3 mm |
| Head / width | 32 mm (1.26 in) | 44.5 mm (1.75 in)+12.5 mm |
| Body | 23 mm (0.91 in) | 32 mm (1.26 in)+9 mm |
| Weight | 156 g listed | 302 g with battery |
| Battery | 18650 | 21700 |
| Max output | 1,800 lm | 2,800 lm |
| Throw | 484 m | 480 m |
| Type | Tactical | Tactical |
| Price | $79.95 at batteryjunction.com, as of Nov 4, 2026 | $159.95 at fenixlighting.com, as of Nov 4, 2026 |
| Source | batteryjunction.com sourced | fenixlighting.com sourced |
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Defender P16 vs LD45R: how they differ
Size and weight
The Acebeam Defender P16 is the shorter light: 131 mm (5.16 in) against 155.3 mm (6.11 in), a difference of 24.3 mm (16%). At its widest point the Acebeam Defender P16 is 12.5 mm slimmer (32 vs 44.5 mm). Weights are published on different bases (Acebeam Defender P16: 156 g listed; Fenix LD45R: 302 g with battery), so they are not directly comparable.
Brightness and throw
The Fenix LD45R is rated brighter: 2,800 lm maximum vs 1,800 lm for the Acebeam Defender P16, 56% more. For beam distance the Acebeam Defender P16 reaches further: 484 m vs 480 m rated throw (1% more).
Battery
The Acebeam Defender P16 runs on a removable 18650 battery; the Fenix LD45R runs on a removable 21700 battery. For scale, a 18650 cell is about 18 × 65 mm and a 21700 about 21 × 70 mm (nominal).
Price
When we checked on Nov 4, 2026, the Acebeam Defender P16 was $79.95 at batteryjunction.com and the Fenix LD45R $159.95 at fenixlighting.com, so the Acebeam Defender P16 cost $80.00 less. Prices change often, so check the current price before you buy.
Type
Both are tactical lights in our catalog with a tube body.
Which should you buy?
Choose the Acebeam Defender P16 if you want a shorter light (24.3 mm shorter) and a slimmer profile (12.5 mm narrower). Choose the Fenix LD45R if you want more output (2,800 lm vs 1,800 lm). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Acebeam Defender P16 Check price ↗ Fenix LD45R
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
Defender P16 vs LD45R FAQ
Which is smaller, the Acebeam Defender P16 or the Fenix LD45R?
The Acebeam Defender P16 is the shorter light: 131 mm (5.16 in) against 155.3 mm (6.11 in), a difference of 24.3 mm (16%). At its widest point the Acebeam Defender P16 is 12.5 mm slimmer (32 vs 44.5 mm). Weights are published on different bases (Acebeam Defender P16: 156 g listed; Fenix LD45R: 302 g with battery), so they are not directly comparable.
Which is brighter, the Acebeam Defender P16 or the Fenix LD45R?
The Fenix LD45R is rated brighter: 2,800 lm maximum vs 1,800 lm for the Acebeam Defender P16, 56% more. For beam distance the Acebeam Defender P16 reaches further: 484 m vs 480 m rated throw (1% more).
Which is cheaper, the Acebeam Defender P16 or the Fenix LD45R?
When we checked on Nov 4, 2026, the Acebeam Defender P16 was $79.95 at batteryjunction.com and the Fenix LD45R $159.95 at fenixlighting.com, so the Acebeam Defender P16 cost $80.00 less. Prices change often, so check the current price before you buy.
Do the Acebeam Defender P16 and Fenix LD45R use the same battery?
The Acebeam Defender P16 runs on a removable 18650 battery; the Fenix LD45R runs on a removable 21700 battery. For scale, a 18650 cell is about 18 × 65 mm and a 21700 about 21 × 70 mm (nominal).
Compare Acebeam Defender P16 with similar lights
Compare Fenix LD45R with similar lights
More
Sources
- Acebeam Defender P16: specs from manufacturer published specs as listed by batteryjunction.com. Price $79.95 from batteryjunction.com, checked Nov 4, 2026; prices change often.
- Fenix LD45R: specs from Fenix product page (manufacturer). Price $159.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
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