When brightness is the deciding factor. The high quality Step-Up electronics of the LEUCHTIE Premium version ensure twice the luminosity and a constant brightness right up to the end of the battery’s life or when it needs recharging after c. 25 hours. Ideal for professional use, e.g. rescue dogs and everywhere where increased visibility is important. The standard size AAA/ Micro rechargeable batteries are easy to change. If no fully recharged batteries are available, standard alkaline batteries can be used.