Why use boost buck driver circuit? 

Because the voltage of UV LED is about 3.8V, and the battery will change from 4.2V to 3.0V during use, in order to achieve the maximum brightness output under any circumstances, we use boost & buck, and compared with the previous linear driver, its efficiency is much higher, which will make the heat smaller and the working time of the flashlight longer

PARAMETER

Material:  Aluminum Alloy

LED: Seoul CUN66A1G

Driver:  linear driver  2 modes 10%-100%  max current output 2.4A, Temperature protection management inside
            constant driver boost&buck 3 modes 5%-30%-100%  max current output 3A, Temperature protection management inside

Low voltage warning:  Yes

Reverse polarity protection:  Yes

Lens type:  ar-coated glass

Reflector: smooth

Mode memory: Yes

Tailstand:  Yes

Battery included:  No

Required battery type:  unprotected 21700 lithium battery

Required battery quantity: 1pcs

Diameter(Head/Body):  34.6 / 27.4  mm

Length:  134 mm

Weight: 124g