HSTNN-OB51 451545-361 456623-001
HSTNN-DB51 KU530AA 500014-001
484785-001

Compatible Models:

For Hp Compaq
6520 6520s 6520p

For HP
541 540 Business Notebook 6530s
Business Notebook 6531s Business Notebook 6535S
For COMPAQ
510 511 516
515