BATERIJA ZA HP Compaq 6720s 6730s 6735s 6820s 6830s 10.8V 4400 mAh Baterija za Laptop HP Business Notebook 6720S 6720s 6730s 6735s 6820s 6830 Neki od odgovarajućih modela su HP 550 HP Business Notebook 6720S 6720s 6730s 6735s 6820s 6830 Compaq 511 515 520 550 610 615