I can't figure out how to charge my Sony portable DVD extra battery

Unfortunately you can not buy a new battery since it is not sold by Sony. It is possible to patch a similar cell into your existing battery. Be warned that it would be difficult to do this.

Link to Cells: http://www.batteryspace.com/polymer-li-ion-cell-3-7v-2500-mah-544792-2c-9-25wh-5a-rate---un38-3-passed.aspx

Guide to removing battery: http://www.ifixit.com/Guide/Sony+DVP-FX730+Battery+Replacement/7812 (There is a comment on this page that lead to the first link)

I’m happy to help further over the phone at https://www.6ya.com/expert/dane_33f9783a1a91f10b

the power system has been interfered with,i won't use a complicated language but i need you to try and use an adapter,if it doesn't work it means the transformer has a problem or it has failed completely and it needs replacement

No! when water enters it will rapidly corrode the ic pins and other critical parts, best to replace the player.

In order to charge the battery you must plug in the power supply AND then turn the off/on switch to OFF. You should see the blue light in front change to red. and you are now charging... Tadah

Battery in this player usually charge in couple of hours and charging light shows it.

Store it full charge. If you store it low charge, then battery life will be compromised. Research and tests have proven that storing batteries full charged will extend its life. Also make sure that you charge stored batteries every 3 months to further extend its life.

I would say that the battery is not accepting a charge because it has gone bad or the charging circuit is not working properly and the battery is not charging.
If you can get a battery to test it with, you can see if the battery charges or if it is just that your battery has gone south. Rechargable batteries have a limited number of charges and if they are allowed to go totally dead and they sit that way for a long time they will not take a charge anymore.

Cheers

Hi Sharon,
do you still need additional battery packs? the model 705 come with 2 slightly different batteries (they are not interchageable). I have 2 of the battery model BAT-05, which I will sell for $40 each + shipping. The other is an ealier model with not battery #. That one is $40 + shipping also. They all keep a good charge. email me at [email protected]
warmest regards,
Marisa

It sounds like you may have a faulty battery or charger.

Take the extra battery and whatever you used to charge it (camcorder or battery charger) back to the shop where you bought it and get them to help you figure out what's wrong with their product. Your purchase is still under warranty and you deserve to have a product that works.

do you have a code ?