Seiko 5M43 Manual - Page 19
Energy Depletion Forewarning Function, Quick-start Function
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English ENERGY DEPLETION FOREWARNING FUNCTION When the energy stored in the capacitor is reduced to an extremely low level, the second hand starts moving at two-second intervals instead of the normal one-second intervals, indicating that the watch needs recharging and will run down in approximately 3 hours (Cal. 3M22) / 6 hours (Cal. 5M42/5M43). If you find the second hand moving at two-second intervals, therefore, be sure to swing the watch from side to side to charge the capacitor sufficiently before using it. Note: The watch remains accurate even while the second hand is moving at two second intervals. QUICK-START FUNCTION This function is very useful when a watch has been stopped for a long time and you need to get it started quickly with only a few swings. This function is available as long as: 1) the watch previously had more than 2 days (Cal. 3M22) / 4 days (Cal. 5M42/ 5M43) of power reserve before it stopped. 2) it has been left untouched for 1 to 4 weeks. 19