Sony NW-E393 How To Use Manual page 98

Help Guide
Check whether the operating system and operating system version
installed on the computer are compatible with your Walkman.
The battery may have deteriorated if you have not used your Walkman
for more than a year. Contact your nearest Sony dealer.
If the remedies above do not solve the problem, use a pen or paper
clip, etc. to press the RESTART button and restart your Walkman, and
then connect again using USB.
[121] Troubleshooting
How long is the life of the built-in rechargeable
battery?
This will differ depending on the environment where your Walkman is
used, but on average the built-in rechargeable battery can be charged
approximately 500 times. The battery life becomes shorter and
capacity is reduced as a result of the number of times it is recharged or
used, and the environment in which it is used. When the usable battery
life is half the usual time even when the battery is fully charged, the
battery should be replaced.
Consult your nearest Sony dealer for more details on the life of the
built-in battery.
[122] Troubleshooting
The rechargeable battery needs to be replaced.
To replace rechargeable batteries, your Walkman needs to be taken
apart professionally. Do not take apart the Walkman by yourself.
Consult your nearest Sony dealer or Sony Service Center for
replacement of rechargeable batteries.
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22/02/16 16:12