Reliable power source and durability for daily use in various devices such as medical equipment, kitchen scales, car keys, watches, computers, calculators, cameras, pulse meters, alarm systems, and remote controls. Arca's lithium button cells feature a high energy density and provide a longer shelf life with maximum leak protection. The polarity (+/-) is clearly marked to protect the user from incorrect insertion and short circuits. Thanks to numerous application icons, the warning and usage instructions on the packaging are easy to recognize.