Seiko 8F35 Manual - Page 18

Ex.) Expected time for battery change: April through June, 2007 English Each graduation of the scale represents three months. Year (2007) "q" mark showing the expected time for battery change q Battery life indicator When the second hand starts moving at two-second intervals instead of the normal one-second interval, replace the battery with a new one as soon as possible. Otherwise, the watch will stop operating in two weeks. * For safety's sake, never use the watch for diving while the second hand is moving at two-second intervals. * When you make a long voyage, check the expected time for battery change referring to "q Expected time for battery change" above, and replace the battery with a new one if necessary before setting off. * The time accuracy is not affected even if the second hand is moving at two-second intervals. * While the second hand is moving at two-second intervals, the date will not change and the watch will 18 not show the calendar even if the crown is pulled out to the first click.