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Casio G-Shock GST-B400 User Manual

Casio G-Shock GST-B400
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Important!
Depending on light intensity and local
conditions, the watch may become hot
to the touch when exposed to light for
charging. Take care to avoid burn
injury after charging. Also, avoid
charging the watch under high-
temperature conditions like the ones
described below.
ー 
On the dashboard of a vehicle
parked in the sun
ー 
Near an incandescent light bulb or
other source of heat
ー 
Under direct sunlight or in other hot
areas for long periods
Checking the Charge Level
In the Timekeeping Mode, the current charge
level is indicated by the mode hand.
A Good (high charge)
B Good (medium charge)
C Low Battery
Low Battery
A low battery will cause [LOW] to flash and will
disable the functions below.
Illumination
Sounds (alarm, etc.)
Connection with a phone
If the charge level drops even further, [CHG]
will flash and the hour and minute hands will
stop at 12 o’clock. If this happens, all functions
are disabled.
Dead Battery
The digital display will go blank if the battery
goes dead. Memory data is lost, and watch
settings are returned to their initial factory
defaults.
Important!
Should the battery go low or go dead,
expose the face (solar panel) to light as
soon as possible.
Exposing the watch to light while its
battery is dead will cause [CHG] to
start flashing. Expose the watch to light
to charge it until the Timekeeping
Mode screen re-appears.
Note
If [R] is flashing, it means that all
functions, except for timekeeping, are
disabled due to high momentary
battery power consumption.
Charging Time Guidelines
The table below shows guidelines for
approximate charging times.
Charging Times Required for 1 Day of
Operation
Light Level (Lux)
Approximate
Charging Time
50,000 8 minutes
10,000 30 minutes
5,000 48 minutes
500 8 hours
Times Required to Achieve Next Charge
Level
Sunny day, outdoors (50,000 lux)
Dead battery
n
Medium
charge
3 hours
Medium charge
n
High
charge
24 hours
High charge
n
Full charge
7 hours
Sunny day, near a window (10,000 lux)
Dead battery
n
Medium
charge
7 hours
Medium charge
n
High
charge
91 hours
High charge
n
Full charge
25 hours
Overcast day, near a window (5,000 lux)
Dead battery
n
Medium
charge
11 hours
Medium charge
n
High
charge
147 hours
High charge
n
Full charge
40 hours
Indoor fluorescent lighting (500 lux)
Dead battery
n
Medium
charge
147 hours
Medium charge
n
High
charge
-
High charge
n
Full charge
-
Note
Actual charging time depends on the
local charging environment.
Watch Operation Guide 5657
8

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Casio G-Shock GST-B400 Specifications

General IconGeneral
ModelGST-B400
SeriesG-Shock
BrandCasio
Display typeAnalog-Digital
Case Size46.6mm
Weight80g
Case MaterialResin/Stainless steel
Band MaterialResin
Water Resistance200 meters
Shock ResistanceYes
Bluetooth ConnectivityYes
Mobile LinkYes
GlassMineral Glass
World TimeYes
Stopwatch1/100 second
TimerYes
Alarm/Hourly Time Signal5 daily alarms, Hourly time signal
Mute FeatureYes
Accuracy±15 seconds per month
Power SupplyTough Solar (Solar powered)
App Connectivity FeatureG-Shock Connected
LightDouble LED light
CalendarFull auto calendar
Other FeaturesBattery level indicator, Power Saving
Battery LifeApproximately 18 months on rechargeable battery (operation period with normal use without exposure to light after charge)

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