Fenix TK17 vs Nitecore P23i size comparison
The Nitecore P23i is 4.5 mm (0.18 in) shorter than the Fenix TK17, and 5 mm narrower at its widest point.
The Nitecore P23i is 4.5 mm (0.18 in) shorter than the Fenix TK17, and 5 mm narrower at its widest point.
Dimensions
| Fenix TK17 Check price ↗ | Nitecore P23i Check price ↗ | |
| Length | 148.5 mm (5.85 in) | 144 mm (5.67 in)−4.5 mm |
| Head / width | 36 mm (1.42 in) | 31 mm (1.22 in)−5 mm |
| Body | 25.4 mm (1.00 in) | 25 mm (0.98 in)−0.4 mm |
| Weight | 197.2 g with battery | — |
| Battery | One included 6000mAh rechargeable li-ion | 21700 |
| Max output | 3,600 lm | 3,000 lm |
| Throw | 330 m | 470 m |
| Type | Tactical | Tactical |
| Price | $104.95 at fenixlighting.com, as of Nov 4, 2026 | $99.95 at batteryjunction.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced | batteryjunction.com sourced Retailer weight (297 g) looks inconsistent with this size; omitted until confirmed |
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
TK17 vs P23i: how they differ
Size and weight
The Nitecore P23i is the shorter light: 144 mm (5.67 in) against 148.5 mm (5.85 in), a difference of 4.5 mm (3%). At its widest point the Nitecore P23i is 5 mm slimmer (31 vs 36 mm).
Brightness and throw
The Fenix TK17 is rated brighter: 3,600 lm maximum vs 3,000 lm for the Nitecore P23i, 20% more. For beam distance the Nitecore P23i reaches further: 470 m vs 330 m rated throw (42% more).
Battery
The Fenix TK17 runs on its own battery (One included 6000mAh rechargeable li-ion); the Nitecore P23i runs on a removable 21700 battery.
Price
When we checked on Nov 4, 2026, the Fenix TK17 was $104.95 at fenixlighting.com and the Nitecore P23i $99.95 at batteryjunction.com, so the Nitecore P23i cost $5.00 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 Fenix TK17 if you want more output (3,600 lm vs 3,000 lm). Choose the Nitecore P23i if you want a shorter light (4.5 mm shorter), a slimmer profile (5 mm narrower) and longer throw (470 m vs 330 m). We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix TK17 Check price ↗ Nitecore P23i
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
TK17 vs P23i FAQ
Which is smaller, the Fenix TK17 or the Nitecore P23i?
The Nitecore P23i is the shorter light: 144 mm (5.67 in) against 148.5 mm (5.85 in), a difference of 4.5 mm (3%). At its widest point the Nitecore P23i is 5 mm slimmer (31 vs 36 mm).
Which is brighter, the Fenix TK17 or the Nitecore P23i?
The Fenix TK17 is rated brighter: 3,600 lm maximum vs 3,000 lm for the Nitecore P23i, 20% more. For beam distance the Nitecore P23i reaches further: 470 m vs 330 m rated throw (42% more).
Which is cheaper, the Fenix TK17 or the Nitecore P23i?
When we checked on Nov 4, 2026, the Fenix TK17 was $104.95 at fenixlighting.com and the Nitecore P23i $99.95 at batteryjunction.com, so the Nitecore P23i cost $5.00 less. Prices change often, so check the current price before you buy.
Do the Fenix TK17 and Nitecore P23i use the same battery?
The Fenix TK17 runs on its own battery (One included 6000mAh rechargeable li-ion); the Nitecore P23i runs on a removable 21700 battery.
Compare Fenix TK17 with similar lights
Compare Nitecore P23i with similar lights
More
Sources
- Fenix TK17: specs from Fenix product page (manufacturer). Drawing: shape measured from manufacturer photo (fenixlighting.com), scaled to the published length and diameter. Price $104.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
- Nitecore P23i: specs from manufacturer published specs as listed by batteryjunction.com. Drawing: shape measured from manufacturer photo (batteryjunction.com), scaled to the published length and diameter. Price $99.95 from batteryjunction.com, checked Nov 4, 2026; prices change often.
Found an error? Email [email protected] and we will fix it.