The metal, lead, tin or, more often, aluminum tube, has been around since 1841. As a testimony to its versatility and resilience, it is now packaged throughout the world with production in excess of a half billion pieces per year in the United States alone.
The soft pack battery is made of 8021 alloy aluminum foil 0.04mm thickness, and there are other aluminum foils (1235/1060/1070 pure aluminum 0.012-0.016mm thickness). The product is widely used in electric bicycles, electric vehicles, power tools, electric toys, solar photo voltaic power generation systems, cigarette lighter power supplies, emergency lighting, portable power sources and mine safety equipment