To prevent battery deterioration, charge the battery at least once every half a year or every year.
Do not leave your Walkman connected for extended periods to a laptop computer that is not connected to AC power, since the Walkman may discharge the computer’s battery. Disconnect your Walkman from the computer before you turn on, restart, wake up from sleep mode, or shut down the computer.
Heat may build up in your Walkman while charging. This is not a malfunction.
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