Battery Type: Li-ion Voltage: 10.8V Capacity: 5200MAH CELL: 6cell Color: Black. Compatible Models: HP ProBook 640 G0 HP ProBook 640 G1 HP ProBook 645 G0 HP ProBook 645 G1 HP ProBook 650 G0 HP ProBook 650 G1 HP ProBook 655 G0 HP ProBook 655 G1 Compatible Part Numbers:CA06 CA06XL 718677-421 718678-421 718755-001 718756-001 HSTNN-DB4Y HSTNN-LB4X HSTNN-LB4Y HSTNN-LB4Z HSTNN-LP4Z. All ASUNCELL Products are CE- RoHS- FCC- Certified and Built-in circuit protection ensure both safety and stability; Strict guidelines for compatibility and standards compliance for environmental safety