JVC SP-AD80-B Instruction Manuals page 24

• Use the supplied micro-USB cable only, and connect
directly to a computer. Charging will not be completed
properly by an indirect connection, such as via a
USB hub.
• If the unit is not used for a long time, the battery
indicator may not light up when you connect the
micro-USB cable to charge the unit. In this case, do not
disconnect the micro-USB cable from the unit and wait
until the battery indicator lights up.
• Charging time varies depending on conditions of use
of the battery and the output voltage of your charging
device.
• The unit will get warm during charging. This is not a
malfunction.
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