Seiko 5d88 User Manual

English

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.

POWER SOURCE (RECHARGEABLE BATTERY)

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.