Fenix E-CP vs Streamlight PolyTac X USB size comparison
The Streamlight PolyTac X USB is 1 mm (0.04 in) longer than the Fenix E-CP, and 4 mm wider at its widest point. Weights are published on different bases (listed vs with battery), so compare them with care.
The Streamlight PolyTac X USB is 1 mm (0.04 in) longer than the Fenix E-CP, and 4 mm wider at its widest point. Weights are published on different bases (listed vs with battery), so compare them with care.
Dimensions
| Fenix E-CP Check price ↗ | Streamlight PolyTac X USB Check price ↗ | |
| Length | 138 mm (5.43 in) | 139 mm (5.47 in)+1 mm |
| Head / width | 28 mm (1.10 in) | 32 mm (1.26 in)+4 mm |
| Body | 28 mm (1.10 in) | 25 mm (0.98 in)−3 mm |
| Weight | 170 g with battery | 139 g listed |
| Battery | Built-in | 18650 / 2x CR123A |
| Max output | 1,600 lm | 600 lm |
| Throw | 222 m | 205 m |
| Type | Work light | Work light |
| Price | $50.96 at fenixlighting.com, as of Nov 4, 2026 | $74.75 at batteryjunction.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced | batteryjunction.com sourced |
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E-CP vs PolyTac X USB: how they differ
Size and weight
The Fenix E-CP is the shorter light: 138 mm (5.43 in) against 139 mm (5.47 in), a difference of 1 mm (1%). At its widest point the Fenix E-CP is 4 mm slimmer (28 vs 32 mm). Weights are published on different bases (Fenix E-CP: 170 g with battery; Streamlight PolyTac X USB: 139 g listed), so they are not directly comparable.
Brightness and throw
The Fenix E-CP is rated brighter: 1,600 lm maximum vs 600 lm for the Streamlight PolyTac X USB, 167% more. For beam distance the Fenix E-CP reaches further: 222 m vs 205 m rated throw (8% more).
Battery
The Fenix E-CP runs on a built-in rechargeable battery; the Streamlight PolyTac X USB runs on removable 18650 / 2x CR123A batteries. Only the Streamlight PolyTac X USB lets you swap in a charged spare.
Price
When we checked on Nov 4, 2026, the Fenix E-CP was $50.96 at fenixlighting.com and the Streamlight PolyTac X USB $74.75 at batteryjunction.com, so the Fenix E-CP cost $23.79 less. Prices change often, so check the current price before you buy.
Type
Both are work lights in our catalog with a tube body.
Which should you buy?
Choose the Fenix E-CP if you want a slimmer profile (4 mm narrower), more output (1,600 lm vs 600 lm) and a built-in battery with no separate cell to buy. Choose the Streamlight PolyTac X USB if you want a removable cell you can swap. We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix E-CP Check price ↗ Streamlight PolyTac X USB
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
E-CP vs PolyTac X USB FAQ
Which is smaller, the Fenix E-CP or the Streamlight PolyTac X USB?
The Fenix E-CP is the shorter light: 138 mm (5.43 in) against 139 mm (5.47 in), a difference of 1 mm (1%). At its widest point the Fenix E-CP is 4 mm slimmer (28 vs 32 mm). Weights are published on different bases (Fenix E-CP: 170 g with battery; Streamlight PolyTac X USB: 139 g listed), so they are not directly comparable.
Which is brighter, the Fenix E-CP or the Streamlight PolyTac X USB?
The Fenix E-CP is rated brighter: 1,600 lm maximum vs 600 lm for the Streamlight PolyTac X USB, 167% more. For beam distance the Fenix E-CP reaches further: 222 m vs 205 m rated throw (8% more).
Which is cheaper, the Fenix E-CP or the Streamlight PolyTac X USB?
When we checked on Nov 4, 2026, the Fenix E-CP was $50.96 at fenixlighting.com and the Streamlight PolyTac X USB $74.75 at batteryjunction.com, so the Fenix E-CP cost $23.79 less. Prices change often, so check the current price before you buy.
Do the Fenix E-CP and Streamlight PolyTac X USB use the same battery?
The Fenix E-CP runs on a built-in rechargeable battery; the Streamlight PolyTac X USB runs on removable 18650 / 2x CR123A batteries. Only the Streamlight PolyTac X USB lets you swap in a charged spare.
Compare Fenix E-CP with similar lights
Compare Streamlight PolyTac X USB with similar lights
More
Sources
- Fenix E-CP: specs from Fenix product page (manufacturer). Drawing: outline from published specs. Price $50.96 from fenixlighting.com, checked Nov 4, 2026; prices change often.
- Streamlight PolyTac X USB: specs from manufacturer published specs as listed by batteryjunction.com. Drawing: outline from published specs. Price $74.75 from batteryjunction.com, checked Nov 4, 2026; prices change often.
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