RMBP not charging battery orange light !

[xpcker]

Hi guys, my battery was dying (its a 2012 MBP) so i bought one new from ebay, all good but when i pluged in the mbp stoped charging at all the batteries (old and new), the lights goes orange and no matter how much time i leave the computer plugged as soon as i Disconnect the plug the mac dies and when i plug it again not even the date is saved, also the mac shows me 30% of battery but it acts as dead (both of them)

any ideas? reseted pram and smc tons of times by now :/

ill try formating the mac

 

[poiihy]

Bad battery.
Maybe you bought a defective battery. Or maybe you did not connect it correctly. Maybe you broke the connector

 

[xpcker]

still no luck, formation didn't solve anything

ill try buying another battery