Seiko 5D22 Manual - Page 21

Power Source Kinetic E.s.u.

Page 21 highlights

English POWER SOURCE (KINETIC E.S.U.) This watch requires no periodic battery replacement as it is powered by the exclusive secondary battery, which is completely different from conventional batteries for watches. This exclusive secondary battery is an environmentally friendly, clean energy storage device. CAUTION Never install a silver oxide battery for conventional watches in place of the KINETIC E.S.U. , which can generate heat that can cause bursting or ignition. 21

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English
±1
This watch requires no periodic battery replacement as it is powered by the
exclusive secondary battery, which is completely different from conventional
batteries for watches.
This exclusive secondary battery is an environmentally friendly, clean energy
storage device.
CAUTION
Never install a silver oxide battery for conventional watches in place of the
KINETIC E.S.U. , which can generate heat that can cause bursting or ignition.
POWER SOURCE (KINETIC E.S.U.)