Fenix LD31 RENEGADE vs Olight ArkPro Ultra size comparison
The Olight ArkPro Ultra is 2.4 mm (0.09 in) shorter than the Fenix LD31 RENEGADE, and 0.5 mm wider at its widest point. It is 44 g lighter (with battery).
The Olight ArkPro Ultra is 2.4 mm (0.09 in) shorter than the Fenix LD31 RENEGADE, and 0.5 mm wider at its widest point. It is 44 g lighter (with battery).
Dimensions
| Fenix LD31 RENEGADE Check price ↗ | Olight ArkPro Ultra Check price ↗ | |
| Length | 126.4 mm (4.98 in) | 124 mm (4.88 in)−2.4 mm |
| Head / width | 26.5 mm (1.04 in) | 27 mm (1.06 in)+0.5 mm |
| Body | 25.6 mm (1.01 in) | — |
| Thickness | — | 16 mm (0.63 in) |
| Weight | 164 g with battery | 120 g with battery−44 g |
| Battery | 21700 | Built-in |
| Max output | 3,200 lm | 1,700 lm |
| Throw | 355 m | 205 m |
| Type | EDC | EDC |
| Price | $99.95 at fenixlighting.com, as of Nov 4, 2026 | $129.99 at olight.com, as of Nov 4, 2026 |
| Source | fenixlighting.com sourced Listed 26.5 mm wide x 25.6 mm high | olight.com sourced |
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LD31 RENEGADE vs ArkPro Ultra: how they differ
Size and weight
The Olight ArkPro Ultra is the shorter light: 124 mm (4.88 in) against 126.4 mm (4.98 in), a difference of 2.4 mm (2%). At its widest point the Fenix LD31 RENEGADE is 0.5 mm slimmer (26.5 vs 27 mm). The Olight ArkPro Ultra is 44 g lighter (120 g vs 164 g, with battery).
Brightness and throw
The Fenix LD31 RENEGADE is rated brighter: 3,200 lm maximum vs 1,700 lm for the Olight ArkPro Ultra, 88% more. For beam distance the Fenix LD31 RENEGADE reaches further: 355 m vs 205 m rated throw (73% more).
Battery
The Fenix LD31 RENEGADE runs on a removable 21700 battery; the Olight ArkPro Ultra runs on a built-in rechargeable battery. Only the Fenix LD31 RENEGADE lets you swap in a charged spare.
Price
When we checked on Nov 4, 2026, the Fenix LD31 RENEGADE was $99.95 at fenixlighting.com and the Olight ArkPro Ultra $129.99 at olight.com, so the Fenix LD31 RENEGADE cost $30.04 less. Prices change often, so check the current price before you buy.
Type
Both are EDC lights in our catalog.
Which should you buy?
Choose the Fenix LD31 RENEGADE if you want more output (3,200 lm vs 1,700 lm), longer throw (355 m vs 205 m) and a removable cell you can swap. Choose the Olight ArkPro Ultra if you want less weight (44 g lighter) and a built-in battery with no separate cell to buy. We compare published size, weight, output, throw and battery only, not runtime, interface or build quality.
Check price ↗ Fenix LD31 RENEGADE Check price ↗ Olight ArkPro Ultra
We may earn a commission from these links, at no cost to you. Rankings are never paid for. Disclosure
LD31 RENEGADE vs ArkPro Ultra FAQ
Which is smaller, the Fenix LD31 RENEGADE or the Olight ArkPro Ultra?
The Olight ArkPro Ultra is the shorter light: 124 mm (4.88 in) against 126.4 mm (4.98 in), a difference of 2.4 mm (2%). At its widest point the Fenix LD31 RENEGADE is 0.5 mm slimmer (26.5 vs 27 mm). The Olight ArkPro Ultra is 44 g lighter (120 g vs 164 g, with battery).
Which is brighter, the Fenix LD31 RENEGADE or the Olight ArkPro Ultra?
The Fenix LD31 RENEGADE is rated brighter: 3,200 lm maximum vs 1,700 lm for the Olight ArkPro Ultra, 88% more. For beam distance the Fenix LD31 RENEGADE reaches further: 355 m vs 205 m rated throw (73% more).
Which is cheaper, the Fenix LD31 RENEGADE or the Olight ArkPro Ultra?
When we checked on Nov 4, 2026, the Fenix LD31 RENEGADE was $99.95 at fenixlighting.com and the Olight ArkPro Ultra $129.99 at olight.com, so the Fenix LD31 RENEGADE cost $30.04 less. Prices change often, so check the current price before you buy.
Do the Fenix LD31 RENEGADE and Olight ArkPro Ultra use the same battery?
The Fenix LD31 RENEGADE runs on a removable 21700 battery; the Olight ArkPro Ultra runs on a built-in rechargeable battery. Only the Fenix LD31 RENEGADE lets you swap in a charged spare.
Compare Fenix LD31 RENEGADE with similar lights
Compare Olight ArkPro Ultra with similar lights
More
Sources
- Fenix LD31 RENEGADE: specs from Fenix product page (manufacturer). Price $99.95 from fenixlighting.com, checked Nov 4, 2026; prices change often.
- Olight ArkPro Ultra: specs from Olight product page (manufacturer). Price $129.99 from olight.com, checked Nov 4, 2026; prices change often.
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