Laptop Battery For HP Compaq 615 6720s 6730s 6735s 6820s 550 610 HSTNN-LB51
6720s 6720s/CT 6820s. 6730s 6730s/CT 6735s. 1.Li-Ion Laptop Battery 10.8V and 11.1V are in common use. 2.Li-Ion Laptop Battery 14.4V and 14.8V are in common use. This compatibility list is non-exhaustive.