See my response to Andrei, regards
Try with this part#: X-2587-179-1, this is the battery used for other countries except US, because these speakers are not for repair, so I doubt that an authorized Sony service center can fix it, but you can place the other in encompass parts, even they will say that belongs to SRSBTX300 but apparently do match, check the specs, 7.4V 13.7Wh (14WHh) 1850mAh with them, the average cost is $130USD, there is another battery in the market with same specs but believe me, is not going to work due to T terminal vs C terminal of the Sony one. good luck attn: Mr. L.
Lorsqu'il en aura reçu, il pourra afficher un graphique de sa réputation au fil du temps.
Voici un aperçu de ce à quoi ressemble ce graphique :
Aucun point de réputation obtenu pour l'instant.