Specifications: Battery type: Li-Polymer; Color: Black; Voltage: 15.4V; Capacity: 55Wh; Battery Cell: 4-Cell. New from Manufacturer Replace Part Number: C41N1727 0B200-02900000 4ICP7/48/70 Compatible Models: Replacement for Asus ROG Zephyrus M GM501 GM501G GM501GM GM501GS Series; Replacement for Asus ROG Zephyrus M GU501 GU501G GU501GM Series; Replacement for Asus GM501GM Series; Replacement for Asus GM501GS Series; Replacement for Asus GU501GM Series: GU501GM-BI7N8 GU501GM-GZ024T GU501GM-GZ045T Security: All ZTHY products are Certified by CE, UL 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