Sony MZ-E510 MiniDisc Player

Sony MZ-E510 portable MiniDisc player. Red. Quantity 1. Used.
* No other items, batteries, or accessories are included in the sale *
** This sale does not include any way of powering the device. Please either ensure you are familiar with this requirement in advance, or reach out to us if you are unsure. **

Summary:
Sold for Parts Only / Not Working.
This is a DAMAGED device and may lose some or all of the functionality it had at the time of testing.
No power via gumstick battery. Power via external AA battery case is OK (not included in sale). Can read and play discs but no audio output. STOP button does not respond.
Some callouts regarding the appearance.

Portable MiniDisc Player:
Sony MZ-E510

Product Condition (Appearance):
Front Face : Discolouration from battery leakage.
Sides : Discolouration from battery leakage.
Rear Face : A few Marks or scratches.
Internal Battery Compartment : Heavy corrosion.
All external facing screws are present and tightened.

Product Condition (Functionality):
No power via gumstick battery. Power via external AA battery case is OK (not included in sale). Can read and play discs but no audio output. STOP button does not respond.

Power Via Rechargeable Gumstick Battery : FAIL * Rechargeable gumstick battery is not included in the sale *
Power Via External AA Battery Case : OK * External AA battery case is not included in the sale *
Power Via Battery Charging Stand (BCA-MZE520) : NOT TESTED *** Battery charging stand is not included in the sale ***

Audio Output : FAIL
Disc Playback : OK - It can read and play discs, but there's no audio output

Group : OK
Volume Down : OK
Volume Up : OK
Play / Pause : OK
Next Track : OK
Previous Track : OK
Stop : FAIL
Hold : OK

Disc Insert : OK
Disc Eject : OK

Product Information:
The Sony MZ-E510 is the penultimate iteration of the 5xx series of MiniDisc players (500,501,505,510,and 520). It is dedicated to disc playback, and does not have disc recording functionality. 
Released in 2003, it features support for MDLP, anti-shock 'G Protection', a six band equalizer, and ATRAC type S technology. 
It weighs 67 grams without a battery or disc installed. 
It has a 3.5 mm headphone jack for audio output.
It was bundled with the RM-MC33EL inline remote control.

Hopefully this information is clear and covers everything you need, but don't hesitate to reach out if you have any questions.