Battery type: Li-ion; Capacity:5200mAh Voltage: 11.1V;Cells: 6-cell.Recharge cycles:500; The battery is durable and has overcurrent protection, anti-overcharge, anti-overdischarge and temperature control functions. Compatible Part Number: CA06, CA06XL, E7U21UT, E7U21AA, 718677-421, 718678-421, 718755-001, 718756-001, 718677-141 Fits: HP Probook 640 G1, Probook 645 G1, Probook 650 G1, Probook 655 G1, CA06, CA06XL, E7U21UT, E7U21AA, 718677-421, 718678-421, 718755-001, 718756-001 Security & Reliability: Our batteries are assembled from top quality material and circuit boards to ensure fast charges and low power consumption, 100% New from Manufacturer, Overcharge and Overdischarge Circuit Protection, Over-temperature and Short-circuit Protection, up to 500 recharge cycles over the life of the battery, meet OEM standard. Warranty & Support: Full refund in 30 days, 12 months warranty. If any issues about the product within 365 days, click the button "ASK A QUESTION&#34