how long would this on/when would would a battery(s) need before charging, i need it overnight, as my cctv dont work at night, or any suggestions?

Battery capacity is measured in milliamp hours mAh. In simple terms the bigger the number the longer the battery will last. I doubt very much that you will find a battery with sufficient capacity to last longer than a few hours of constant use. The cost of replacing them would be prohibitive and rechargeables would be too much of a faff. I'd recommend a mains powered LED floodlight, either white light or if you really want then UV. They are not expensive and will work well and can light up a large area effectivly. I do suspect though that UV won't be a good idea as it is "visible" so the surrounding area will appear purple and anything white or flurescent will glow very very brightly. see less

does this actually pick up finger prints on any surface inc white or light surfaces?

Not sure bout fingerprints but it does do urine (dog mess) etc

Can this be ised to clean or kill algae in water?

Not sure about that one, at a guess I’d say no??

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Lepro UV Torch, 51 LED UV Light Torch, 395nm Ultraviolet Flashlight

Product ID: 368727354

Details

Colour
Black
Light source type
UV
Material
Aluminium
Power source
Battery
Special feature
High Power

🌊IPX4 waterproof & moisture resistant

💡51 UV LEDs for max brightness

🔬395nm wavelength for precise detection

R778

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Description

🔦 Unmask the unseen — because what you don’t see can’t hurt you, until it does.

ILLUMINATE HIDDEN MESSES - 395nm UV wavelength reveals invisible stains & pet accidents instantly.
BRIGHTER BROADER COVERAGE - 51 LEDs deliver 40% more brightness, scanning larger areas faster—clean smarter, not harder.
BUILT TO LAST GO ANYWHERE - Durable aluminum alloy body with anti-slip grip and IPX4 water resistance for rugged, everyday use.
MULTI PURPOSE DETECTIVE TOOL - From spotting bed bugs to authenticating banknotes, this torch is your all-in-one inspection sidekick.
EFFORTLESS OPERATION LONG RUNTIME - One-button simplicity with up to 20 hours of battery life keeps you powered through any investigation.

The Lepro UV Torch features 51 high-power UV LEDs emitting a 395nm wavelength, making it 40% brighter than typical UV flashlights. Its durable aluminum alloy build is IPX4 rated for water resistance, ensuring reliable use indoors and outdoors. Ideal for detecting invisible pet stains, bed bugs, counterfeit banknotes, and more, it offers up to 20 hours of battery life powered by 3 AA batteries. Compact and user-friendly, this torch transforms everyday cleaning and inspection into a high-tech experience.

Specifications

ASIN	B09636FL56
Batteries are Included	No
Battery Description	AA batteries
Battery Type	Alkaline
Best Sellers Rank	458 in Lighting ( See Top 100 in Lighting ) 2 in Torch Lights
Brand Name	Lepro
Bulb Base	GX5.3
Bulb Shape Size	T6 1/2
Colour	Black
Country Of Origin	China
Customer Reviews	4.4 4.4 out of 5 stars (6,858)
Finish	Resin
Fixture Features	High Power
Included Components	UV Flashlight
Item Dimensions D x W x H	6.5D x 6.5W x 13.5H centimetres
Item Highlight	Blacklight Detector for Pet Urine, Stain, Bed Bugs, Banknote and More
Item Shape	Cylindrical
Item Type Name	Lepro UV Torch, 51 LED UV Light Torch, 395nm Ultraviolet Flashlight, Blacklight Detector for Pet Urine, Stain, Bed Bugs, Banknote and More
Item Weight	0.15 Kilograms
Light Source Special Features	Increased Brightness
Manufacturer	Lepro
Manufacturer Part Number	PR110018
Material	Aluminium
Model Number	PR110018
Mounting Type	Handheld
Number of Batteries	3 AA batteries required.
Number of Items	1
Number of Lights	51
Number of Packs	1
Power and Plug Description	Battery Powered
Recommended Uses For Product	finding invisible stains, detecting larger areas with more brightness, checking banknotes, finding bed bugs
Runtime	20 hours
Size	Small
Specification Met	IPX4
Style	Modern
Type of Bulb	UV
Unit Count	1.0 count
Voltage	4.5 Volts
Water Resistance Level	Waterproof
Wattage	3 watts
White Brightness	50 Lumens

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