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Symptom
The charge indicator lamp
blinks red, and battery
charging doesn't begin.
Battery usage time is
short even though the
battery is fully charged.
The battery takes a long
time to charge.
The USB power lamp
has switched off and the
USB device has stopped
charging.
USB power lamp does not
switch off even though the
USB device has fi nished
charging.
It is unclear what the
charging status of a USB
device is, or whether its
charging is complete.
Charging of a USB device
pauses midway.
Charging of the USB
device pauses midway
when the battery and the
USB device are being
charged at the same time.
Charging of the USB
device doesn't start when
the battery and the USB
device are being charged
at the same time.
Possible cause
The battery is not inserted all the way.
The battery is overheated.
The battery's life is depleted.
The temperature of the battery, the
charger, or the surrounding environment is
extremely low.
The charger's vents are blocked, causing
its internal components to overheat.
The cooling fan is not running.
The battery's capacity has become low.
The USB power lamp lights up green to
indicate that USB charging is possible.
The USB power lamp does not switch off
even when charging is complete.
The charger was plugged into an electrical
socket while the USB device was being
charged using the battery as the power
source.
A battery was inserted into the charger
while the USB device was being charged
using a power socket as the power source.
The battery has become fully charged.
The remaining battery capacity is
extremely low.
Remedy
Insert the battery fi rmly.
If left alone, the battery will automatically
begin charging if its temperature decreases,
but this may reduce battery life. It is
recommended that the battery be cooled in
a well-ventilated location away from direct
sunlight before charging it.
Replace the battery with a new one.
Charge the battery indoors or in another
warmer environment.
Avoid blocking the vents.
Contact a Hitachi Authorized Service
Center for repairs.
Replace the battery with one that has
capacity remaining.
Plug the charger's power plug into an
electric socket.
This is not a malfunction.
Examine the USB device that is charging to
confi rm its charging status.
This is not a malfunction.
The charger pauses USB charging for about
5 seconds when it is diff erentiating between
power sources.
This is not a malfunction.
The charger pauses USB charging for
about 5 seconds while it checks whether
the battery has successfully completed
charging.
This is not a malfunction.
When the battery capacity reaches a
certain level, USB charging automatically
begins.
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