JYF&trade; (X550E 2950mah 4Cell) A41-X550E Laptop Battery for Asus X450 X 450E X450J X450JF A450J A450JF A450E Battery type: Li-ion; Capacity: 2950mah; Voltage: 15.0V. 100% NEW from manufacturer; Up to 500 recharge cycles over the life of the battery Superior Quality: Grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures both safety and reliability. Built-in circuit protection. voltage or temperature ensures safety and extended battery life. 24 x 7 email support; 12-month hassle-free warranty