Seiko 5D88 User Guide - Page 12

English English POWER SOURCE (Rechargeable battery) This watch requires no periodic battery replacement as it is powered by the exclusive rechargeable battery, which is completely different from conventional batteries for watches. This exclusive rechargeable battery is an environmentally friendly, clean energy storage device. CAUTION Never install a silver oxide battery for conventional watches in place of the rechargeable battery, which can generate heat that can cause bursting or ignition. NOTES ON OVERHAUL The watch is a precision device. If the parts run short of oil or get worn out, the watch may stop its operation or lose time. We recommend you have the watch overhauled periodically to keep it running accurately. SPECIFICATIONS 1 Frequency of crystal oscillator 32,768 Hz (Hz = Hertz ... Cycles per second) 2 Loss/gain (monthly rate Less than 15 seconds (worn on the wrist at normal temperature range between 5° C and 35° C) 3 Operational temperature range 10° C ~ +60° C 4 Driving system Step motor: 2 pieces 5 Display system 24-hour, hour, minute, second, date, day of the week, and moon phase. Power reserve display, power generation status display, and generated power amount display 6 Rechargeable battery Button type, 1 piece 7 Duration of charge Approximately 1 month (if the watch is fully charged) 8 Additional functions Overcharge prevention function 9 IC (Integrated Circuit C-MOS-IC, 1 piece 10 Generating system Miniature AC generator * The specifications are subject to change without prior notice for product improvements. 22 23