Specifications: Battery type: Li-ion. Color: Black. Voltage: 11.55V. Capacity: 56Wh/4850mAh. New from Manufacturer. Up to 500 recharge cycles over the life of the battery Replace Part Number: 932824-1C1, 932824-2C1, 932824-421, 933322-855, HSN-113C-5, HSN-I13C-5, HSTNN-DB8K, HSTNN-LB8H, HSTNN-UB7T, TT03056XL, TT03XL Compatible Models: Replacement for HP EliteBook 755 G5 Series; Replacement for HP EliteBook 850 G5 G6 Series; Replacement for HP ZBook 15U G5 G6 Series Notebook Security: All ZTHY products are Certified by CE, FCC for safety. Strict guidelines for compatibility, and standards compliance for environment safety Note: If the new battery is not recognized during the initial installation, please reinstall and check if the interface is fully connected. Discharge the new battery to 10-20% (not 0%), then charge and cycle 3-4 times to wake up the new battery