There are provided a steel wire rod for ultra-high-strength parts such as automobile engine bolts or structural mechanical parts, and a method for producing the steel wire rod. A predetermined strain has been applied to each film. The release may be operated when the gate is in either the open or closed positions. The second mechanical connecting member is engagable with the first mechanical connecting member of another similar battery. The haptic instructions are at least partially based on a physical characteristic of a haptic device.