With up to 38% reduced weight compared to alkaline VARTA ULTRA lithium batteries, they are perfect for sports and outdoor use and perform exceptionally well in extreme conditions. You can rely on them whether you are playing with your children using walkie talkies or taking pictures with your digital camera on an adventure trip in extreme temperatures. They also work perfectly with safety devices such as smoke detectors. The highest quality for high energy requirements keeps you independent in all areas of life.