Green Cell Battery for HP 550 610 HP Compaq 6720s 6820s / 11,1V 4400mAh - GreenCell - PowerX - Battery specialty store
Batteria 10.8 v 4.4 Ah Li - ion per HP 550 - Vlad
New Battery for HP Compaq 550 610 6720s/CT 6730s 6735s 6820s 6830s HSTNN-LB52 | eBay
ASUNCELL Batteria del computer portatile per HP 550 Compaq 610 Business Notebook 6720s 6720s/CT 6730s 6730s/CT 6735s 6820s 6830s Series 451568-001 456864-001 : Amazon.it: Informatica