Replacement notebook battery for HP Probook 640, 640 G0, 640 G1, 645, 650, 650 G1, 655, 655 G1 (6-cells); Replaces E7U21UT E7U21AA CA06XL CA06 718677-141 718756-001; Specs Lithium Ion 6-cells 10.8V 5200mAh 56Whr