VARTA Microbattery, a subsidiary of Germany's VARTA AG, has filed suit against the American division of Korea's Samsung (2:20-cv-00029) over three patents generally related to single cell batteries. The plaintiff targets Samsung’s provision of Galaxy Buds earphones using, for example, ICR 1254 batteries allegedly sourced from EVE Energy, a Chinese company described on its translated website as “focus[ing] on lithium battery innovation and manufacture”. VARTA Microbattery’s infringement allegations focus on those ICR 1254 batteries.