This is a brand new battery for the IdeaPad P500 z400 z500.

This Lenovo IdeaPad Z400 battery is also compatible with the Lenovo IdeaPad P500 and Z500 series laptops.

We use the highest quality lithium-ion battery cells and components that charge faster, last longer and weigh less than cheaper, lower quality batteries. Low quality batteries can wear out in just a few months. Our batteries can last up to 5 years.

This battery carries a full 1 Year warranty and every battery is charged and tested before it ships. We provide a 30 day money back guarantee if you are not completely satisfied. We are so confident in the quality of our batteries, we will pay for any and all shipping expenses if our product fails to perform in the first 30 days you have our battery, even if it is not our fault.

You can expect up to 4 hours of run time with this Lenovo Z400 battery. You can get even longer battery life by reducing your screen brightness and closing unused programs and applications.