The versatile P7RCore flashlight provides outstanding power and innovative technologies, including the Smart Light Technology for customizable light functions. Its energy comes from a 21700 Lithium-ion battery, easily replaceable by opening the end cap. With our Flex Sealing Technology, the P7R Core is safeguarded against dust and water, capable of enduring continuous submersion. The patented Advanced Focus System operates effectively up to one meter underwater, making the P7R Core the perfect flashlight for diverse occasions.