No. Sony WS623 comes with non-removable battery.
Yes, Sony NS-WS623 is meant for the rough usage and it is both - waterproof and dustproof.
Hold down the button 1 for 3 seconds.
You will hear the startup sound.
When the Walkman turns on, the lamp (2) lights up.
Connect the USB cable (supplied) to the USB cradle (supplied). Then, attach the Walkman to the USB cradle.
Make sure to connect the terminals ( 1 and 2 ).
No. It does not have.