Go to Amazon Sites : br br ATC (4400mAh 8cell) Extended Capacity Laptop Battery for HP 510 Notebook PCHP 530 Notebook br br ATC 4400mAh 8cell Extended Capacity Laptop Battery for HP 510 Notebook PCHP 530 Notebook PC Series PN HPCOMPAQ 441674-001 RW557AA 443063-001 440264-ABC 440265-ABC 440266-ABC 440268-ABC 440704-001 HSTNN-FB40 HSTNN-IB45 RW557AAR RU962AA RU963AAR RU963AA RU964AAR RU964AA RX709AAR RX709AA