Battery Type: Li-ion Voltage: 14.8V Capacity: 70Wh 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. Replace Part Number: C42-UX51 Fit For: ASUS UX51 Series, ASUS UX51VZ Series, ASUS U500VZ Series Reminder: 1. New replacement battery come with some power, please first discharge and then fully charge. 2. It is best not to completely drain the battery while charging. 3. Don't store the battery for too long without using. 4. Don't put the battery near the fire source to avoid personal safety.