Seiko 4F56 - Battery;Battery Life;Accuracy; Lumibrite

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Batterylifeanditsaccuracyvarydependingonthetypeofyourwatch.
Checkthecasebackofyourwatchtoidentifythetypeofwatch.
（Referto"Dailycare".）
Battery/Batterylife/Accuracy
○Thebatterylifeshownaboveisforawatchwithanewbattery.
○Thebatteryinthewatchatthetimeofpurchaseisamonitorbatteryinserted
 inthewatchatthefactoryforperformancechecks,therefore,thebattery
mayrundownearlierthantheabove-specifiedperiod.
○Theaccuracyisundertheconditionthatthewatchiswornonthewrist
inanormaltemperaturerangebetween5℃and35℃.
※Monthlyrateofoss/gainmayamounttoapproximately4secondsdependingonthecounditionofuse.
○Loss/Gainisdetermindperyear;i.e.,eachmonthdoesnotlose/gain
 thesamenumberofseconds(e.g.Onemonth=2secs.,anothermonth=
 1sec.,etc)
○Operationaltemperaturerange;−10℃〜＋60℃.(14°F〜140°F).
）
Typeofwatch
(Thefirstfourdigitsofthecaliber
numberofyourwatchEx.8F56-00D0)
Approx.5years
Approx.10years
±20seconds
permonth
（
Loss/Gain
Battery
life
Battery
SB−
T18
T19
4F56
8F56
Lumibrite
[Ifyourwatchhaslumibrite]
LumiBriteisaluminouspaintthatiscompletelyharmlesstohumanbeingsandnaturalen-
vironment,containingnonoxiousmaterialssuchasradioactivesubstance.
LumiBriteisanewly-developedluminouspaintthatabsorbsthelightenergyofthesunlight
andlightingapparatusinashorttimeandstoresittoemitlightinthedark.
For example, if exposed to a light of more than 500 lux for approximately 10 minutes,
LumiBritecan emitlightfor5 to 8hours.Pleasenote, however,that,asLumiBriteemits
thelightitstores,theluminancelevelofthelightdecreasesgraduallyovertime.Thedura-
tionof the emitted light mayalsodifferslightlydependingonsuch factors as the bright-
ness of the place where the watch is exposed to light and the distance from the light
sourcetothewatch.
<Referencedataontheluminance>
(A)Sunlight
[Fineweather]:100,000lux [Cloudyweather]:10,000lux
(B)Indoor(Window-sideduringdaytime)
[Fineweather]:morethan3,000lux [Cloudyweather]:1,000to3,000lux
[Rainyweather]:lessthan1,000lux
(C)Lightingapparatus(40-wattdaylightfluorescentlight)
[Distancetothewatch:1m]:1,000lux
[
Distancetothewatch:3m]:500lux(averageroomluminance) [Distancetothewatch:4m]:250lux
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