Figure F25. Variation of voltages and currents in the seawater battery system at a test before Leg 191. The power control system (PCS) makes the power switch turn off when the voltage of the accumulator is <20.8 V for ~26 hr. After charging the accumulator, the power switch is turned on because the voltage is >26.5 V. The data were collected by the PCS and were stored in the data logger.