Is your ASUS laptop dying too fast? This replacement battery is here to save the day! Compatible with ASUS X451, X551, X451C, X451CA, X551C, X551CA models (and more - check the list). It's a 2200mAh, 14.4V/14.8V Li-ion battery with 4 cells. Brand new, never used, in original packaging. Part numbers match A41N1308, A31N1319, and others. Black color, standard design. Just swap out your old, worn battery and get back to full portability. Please note: California Prop 65 warning applies as batteries contain chemicals. Always recycle old batteries properly. Generic/unbranded but built to fit and function. Give your laptop a new lease on life without breaking the bank. Perfect for students, remote workers, or anyone who needs their ASUS running longer off the charger.