Acebeam Defender P16 vs Nitecore P23i size comparison
The Nitecore P23i is 13 mm (0.51 in) longer than the Acebeam Defender P16, and 1 mm narrower at its widest point.
The Nitecore P23i is 13 mm (0.51 in) longer than the Acebeam Defender P16, and 1 mm narrower at its widest point.
Dimensions
| Acebeam Defender P16 Check price ↗ | Nitecore P23i Check price ↗ | |
| Length | 131 mm (5.16 in) | 144 mm (5.67 in)+13 mm |
| Head / width | 32 mm (1.26 in) | 31 mm (1.22 in)−1 mm |
| Body | 23 mm (0.91 in) | 25 mm (0.98 in)+2 mm |
| Weight | 156 g listed | — |
| Battery | 18650 | 21700 |
| Max output | 1,800 lm | 3,000 lm |
| Throw | 484 m | 470 m |
| Type | Tactical | Tactical |
| Price | $79.95 at batteryjunction.com, as of Nov 4, 2026 | $99.95 at batteryjunction.com, as of Nov 4, 2026 |
| Source | batteryjunction.com sourced | batteryjunction.com sourced Retailer weight (297 g) looks inconsistent with this size; omitted until confirmed |
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Defender P16 vs P23i: how they differ
Size and weight
The Acebeam Defender P16 is the shorter light: 131 mm (5.16 in) against 144 mm (5.67 in), a difference of 13 mm (9%). At its widest point the Nitecore P23i is 1 mm slimmer (31 vs 32 mm).
Brightness and throw
The Nitecore P23i is rated brighter: 3,000 lm maximum vs 1,800 lm for the Acebeam Defender P16, 67% more. For beam distance the Acebeam Defender P16 reaches further: 484 m vs 470 m rated throw (3% more).
Battery
The Acebeam Defender P16 runs on a removable 18650 battery; the Nitecore P23i 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 Nitecore P23i $99.95 at batteryjunction.com, so the Acebeam Defender P16 cost $20.00 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 (13 mm shorter). Choose the Nitecore P23i if you want more output (3,000 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 ↗ Nitecore P23i
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Defender P16 vs P23i FAQ
Which is smaller, the Acebeam Defender P16 or the Nitecore P23i?
The Acebeam Defender P16 is the shorter light: 131 mm (5.16 in) against 144 mm (5.67 in), a difference of 13 mm (9%). At its widest point the Nitecore P23i is 1 mm slimmer (31 vs 32 mm).
Which is brighter, the Acebeam Defender P16 or the Nitecore P23i?
The Nitecore P23i is rated brighter: 3,000 lm maximum vs 1,800 lm for the Acebeam Defender P16, 67% more. For beam distance the Acebeam Defender P16 reaches further: 484 m vs 470 m rated throw (3% more).
Which is cheaper, the Acebeam Defender P16 or the Nitecore P23i?
When we checked on Nov 4, 2026, the Acebeam Defender P16 was $79.95 at batteryjunction.com and the Nitecore P23i $99.95 at batteryjunction.com, so the Acebeam Defender P16 cost $20.00 less. Prices change often, so check the current price before you buy.
Do the Acebeam Defender P16 and Nitecore P23i use the same battery?
The Acebeam Defender P16 runs on a removable 18650 battery; the Nitecore P23i 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 Nitecore P23i 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.
- Nitecore P23i: specs from manufacturer published specs as listed by batteryjunction.com. Price $99.95 from batteryjunction.com, checked Nov 4, 2026; prices change often.
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