Do you have a link for a recommendation on a 3rd cell for this light?

Yes we do. But don't think we can post the url here as it is outside of Amazon. But, please allow us to offer some guidance. There are TWO OPTIONS to extend working time on a single charge of the cells. 1) Add third cell using the supplied extension barrel, or 2) Use higher capacity (mAh) 18650 cells, for example 3200mAH cells will give you around 5-6+ hours of working time. HOWEVER, you will see examples which say 9000mAh. The highest known capacities at the time of this writing is near 3400mAh. Anything beyond that should be examined closely as these are often inflated figures. It is better (although not mandatory) to go for good manufacturers such as Panasonic, LG, Sony, Samsung, and the like. Also, a very quick check on any examples you have is to weigh them. If any one cell is below 40 grams in weight then this indicates poor internal cell chemistry. Hope this helps. [uvBeast]

What’s the difference between this leds uv and nitchi uv (both 365 nm)?

Maybe they are from Nichia. Not many manufacturers of 365 LEDs. Makes no difference though. It's real.

Can you check oil leaks in automotive? Engine, transmission fluids etc?

Indeed. Although UV reactive dye will need to be used.

Can I purchase a clear lens separately if I don’t want to run in 365nm?

Hi Nicholas. Thanks for your question. You will always be emitting 365 nanometer wavelength UV even if you fit a clear lens. That's because the LEDs on the V3 365nm emit at 365nm wavelength. If you need a different wavelength then you'll need different LEDs. The only other wavelength LEDs available are at the 385nm and upwards end. Visible light is at around 395nm+. (LEDs also come in the 270nm range btw which is the dangerous UV). Please note that what you can use a 385nm+ UV flashlight for, a 365nm flashlight will also do in the majority of use cases. Hope that helps. [uvBeast]

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🔦 Light Up Your Professional Edge with Pure 365nm Power!

LONG RANGE PRECISION - Illuminate targets over 60 feet away with a focused beam designed for commercial and professional use.
READY OUT OF THE BOX - Includes rechargeable lithium-ion batteries, USB charger, and extension barrel—everything you need to dominate your UV tasks.
TRIPLE LED BRILLIANCE - Three high-intensity LEDs delivering a combined 5400 uW/cm² for superior detection and inspection.
RUGGED AEROSPACE BUILD - Crafted from black anodized aerospace-grade aluminum for durability that matches your demanding workflow.
PURE 365 NM UV POWERHOUSE - Experience unmatched UV purity with professional-grade filtered 365nm wavelength—no compromises, no shortcuts.

The uvBeast V3 365nm Black Light UV Flashlight is a professional-grade tool featuring triple high-flux 365nm LEDs that deliver a powerful 5400 uW/cm² UV intensity. Engineered for long-range use with a beam reaching over 60 feet, it offers superior UV purity through a specialized filter, housed in a durable aerospace-grade aluminum body. Perfect for commercial and professional applications, it comes complete with rechargeable lithium-ion batteries and a USB charger, ensuring you’re always ready to perform at the highest level.

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Product Dimensions	22 x 5.51 x 2.31 cm; 377 g
Item Weight	377 Grams
Specific uses	Commercial, Residential, Professional; Professional Grade High Flux Density 365nm UV
Finish types	Black Anodized Aerospace-grade Aluminium
Warranty description	1 year manufacturer.
Batteries required	Yes
Battery type	Lithium-Ion
Included components	Extension barrel for optional third cell, Two-bay USB charger with mains adapter, UV Filter, x2 18650 Li-ion Recharageable Cells

uvBeast V3 365nm Black Light UV Flashlight – High Definition Ultraviolet - HIgh Power and Long Range Professional Grade Beam Best for Professional/Commercial Use – USA Stock

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