Klarus G15 vs Olight ArkPro Ultra size comparison
The Olight ArkPro Ultra is 3 mm (0.12 in) longer than the Klarus G15, with about the same max diameter/width. Weights are published on different bases (with battery vs listed), so compare them with care.
The Olight ArkPro Ultra is 3 mm (0.12 in) longer than the Klarus G15, with about the same max diameter/width. Weights are published on different bases (with battery vs listed), so compare them with care.
Dimensions
| Klarus G15 Check price ↗ | Olight ArkPro Ultra Check price ↗ | |
| Length | 121 mm (4.76 in) | 124 mm (4.88 in)+3 mm |
| Head / width | 27 mm (1.06 in) | 27 mm (1.06 in)same |
| Body | 25 mm (0.98 in) | — |
| Thickness | — | 16 mm (0.63 in) |
| Weight | 70 g listed | 120 g with battery |
| Battery | 21700 | Built-in |
| Max output | 4,200 lm | 1,700 lm |
| Throw | 200 m | 205 m |
| Type | EDC | EDC |
| Price | $79.95 at batteryjunction.com, as of Nov 4, 2026 | $129.99 at olight.com, as of Nov 4, 2026 |
| Source | batteryjunction.com sourced | olight.com sourced |
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G15 vs ArkPro Ultra: how they differ
Size and weight
The Klarus G15 is the shorter light: 121 mm (4.76 in) against 124 mm (4.88 in), a difference of 3 mm (2%). At their widest points they are about the same (27 vs 27 mm). Weights are published on different bases (Klarus G15: 70 g listed; Olight ArkPro Ultra: 120 g with battery), so they are not directly comparable.
Brightness and throw
The Klarus G15 is rated brighter: 4,200 lm maximum vs 1,700 lm for the Olight ArkPro Ultra, 147% more. For beam distance the Olight ArkPro Ultra reaches further: 205 m vs 200 m rated throw (3% more).
Battery
The Klarus G15 runs on a removable 21700 battery; the Olight ArkPro Ultra runs on a built-in rechargeable battery. Only the Klarus G15 lets you swap in a charged spare.
Price
When we checked on Nov 4, 2026, the Klarus G15 was $79.95 at batteryjunction.com and the Olight ArkPro Ultra $129.99 at olight.com, so the Klarus G15 cost $50.04 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 Klarus G15 if you want a shorter light (3 mm shorter), more output (4,200 lm vs 1,700 lm) and a removable cell you can swap. Choose the Olight ArkPro Ultra if you want 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 ↗ Klarus G15 Check price ↗ Olight ArkPro Ultra
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G15 vs ArkPro Ultra FAQ
Which is smaller, the Klarus G15 or the Olight ArkPro Ultra?
The Klarus G15 is the shorter light: 121 mm (4.76 in) against 124 mm (4.88 in), a difference of 3 mm (2%). At their widest points they are about the same (27 vs 27 mm). Weights are published on different bases (Klarus G15: 70 g listed; Olight ArkPro Ultra: 120 g with battery), so they are not directly comparable.
Which is brighter, the Klarus G15 or the Olight ArkPro Ultra?
The Klarus G15 is rated brighter: 4,200 lm maximum vs 1,700 lm for the Olight ArkPro Ultra, 147% more. For beam distance the Olight ArkPro Ultra reaches further: 205 m vs 200 m rated throw (3% more).
Which is cheaper, the Klarus G15 or the Olight ArkPro Ultra?
When we checked on Nov 4, 2026, the Klarus G15 was $79.95 at batteryjunction.com and the Olight ArkPro Ultra $129.99 at olight.com, so the Klarus G15 cost $50.04 less. Prices change often, so check the current price before you buy.
Do the Klarus G15 and Olight ArkPro Ultra use the same battery?
The Klarus G15 runs on a removable 21700 battery; the Olight ArkPro Ultra runs on a built-in rechargeable battery. Only the Klarus G15 lets you swap in a charged spare.
Compare Klarus G15 with similar lights
Compare Olight ArkPro Ultra with similar lights
More
Sources
- Klarus G15: specs from manufacturer published specs as listed by batteryjunction.com. Price $79.95 from batteryjunction.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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