Acebeam Defender P16 vs Fenix TK20R UE size comparison
The Fenix TK20R UE is 22.7 mm (0.89 in) longer than the Acebeam Defender P16, and 2 mm wider at its widest point. Weights are published on different bases (with battery vs listed), so compare them with care.
The Fenix TK20R UE is 22.7 mm (0.89 in) longer than the Acebeam Defender P16, and 2 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 TK20R UE Check price ↗ | |
| Length | 131 mm (5.16 in) | 153.7 mm (6.05 in)+22.7 mm |
| Head / width | 32 mm (1.26 in) | 34 mm (1.34 in)+2 mm |
| Body | 23 mm (0.91 in) | 25.4 mm (1.00 in)+2.4 mm |
| Weight | 156 g listed | 204 g with battery |
| Battery | 18650 | 21700 |
| Max output | 1,800 lm | 2,800 lm |
| Throw | 484 m | 465 m |
| Type | Tactical | Tactical |
| Price | $79.95 at batteryjunction.com, as of Nov 4, 2026 | $89.95 at fenixlighting.com, as of Nov 4, 2026 |
| Source | batteryjunction.com sourced | fenixlighting.com sourced |
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Defender P16 vs TK20R UE: how they differ
Size and weight
The Acebeam Defender P16 is the shorter light: 131 mm (5.16 in) against 153.7 mm (6.05 in), a difference of 22.7 mm (15%). At its widest point the Acebeam Defender P16 is 2 mm slimmer (32 vs 34 mm). Weights are published on different bases (Acebeam Defender P16: 156 g listed; Fenix TK20R UE: 204 g with battery), so they are not directly comparable.
Brightness and throw
The Fenix TK20R UE 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 465 m rated throw (4% more).
Battery
The Acebeam Defender P16 runs on a removable 18650 battery; the Fenix TK20R UE 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 TK20R UE $89.95 at fenixlighting.com, so the Acebeam Defender P16 cost $10.00 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 (22.7 mm shorter) and a slimmer profile (2 mm narrower). Choose the Fenix TK20R UE 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 TK20R UE
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
Defender P16 vs TK20R UE FAQ
Which is smaller, the Acebeam Defender P16 or the Fenix TK20R UE?
The Acebeam Defender P16 is the shorter light: 131 mm (5.16 in) against 153.7 mm (6.05 in), a difference of 22.7 mm (15%). At its widest point the Acebeam Defender P16 is 2 mm slimmer (32 vs 34 mm). Weights are published on different bases (Acebeam Defender P16: 156 g listed; Fenix TK20R UE: 204 g with battery), so they are not directly comparable.
Which is brighter, the Acebeam Defender P16 or the Fenix TK20R UE?
The Fenix TK20R UE 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 465 m rated throw (4% more).
Which is cheaper, the Acebeam Defender P16 or the Fenix TK20R UE?
When we checked on Nov 4, 2026, the Acebeam Defender P16 was $79.95 at batteryjunction.com and the Fenix TK20R UE $89.95 at fenixlighting.com, so the Acebeam Defender P16 cost $10.00 less. Prices change often, so check the current price before you buy.
Do the Acebeam Defender P16 and Fenix TK20R UE use the same battery?
The Acebeam Defender P16 runs on a removable 18650 battery; the Fenix TK20R UE 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 TK20R UE 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 TK20R UE: specs from Fenix product page (manufacturer). Price $89.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
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