An ultrasonic surgical blade has a blade body at a distal end and a shank at a proximal end, the shank being connectable at a proximal end to a source of ultrasonic mechanical vibrations. In option, the circuitry may maintain a journal to record information that is related to a transaction that may result in writing to at least one logical address and at least one physical address of the storage. The horn switch mechanism includes an extended portion extending forwards. The cathode active material includes sulfur grafted poly. The predicted yaw rate can be generated by sending the measured yaw rate through a lead filter.