This is a brand new L10P6F01 Battery for the Lenovo IdeaPad Y470 and Y570 series.
This L10P6F01 battery is rated at 5200 mAh. This battery will still be compatible if your existing battery is rated at 4400 or 4800 mAh or a lower Whr. It just means this battery will last even longer.
All our products carry a full 2 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.