Sony NW-E393 How To Use Manual page 21

Help Guide
function.
flashes at the top of the screen if buttons are pressed while the
HOLD function is enabled.
[11] How to Use
Charging the battery
Charge your Walkman by connecting it to a computer.
1. Connect your Walkman to a running computer via USB.
The battery status icon shows
2. Disconnect your Walkman from the computer when charging is
complete.
Hint
For information about the time to fully charge the battery, see
"Specifications."
Note
When you charge your Walkman when it has not been used for a long
period of time or when you use it for the first time, your computer may
not recognize it. The Walkman should start operating normally again
after charging for about 10 minutes.
You cannot operate your Walkman when it is connected to a computer.
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Getting Started Power/Charging
http://helpguide.sony.net/dmp/nwe390/v1/en/print.html
when charging is complete.
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