Adhering To The Principle Of Customer FirstWe specialize in providing quality power products and quality customer service.24 x 7 email support. (Note: return windows will close after one month, If you have any problem with battery, please Contact us - in "YOUR ORDER" options click the "contact seller".) Tech Specs & 100% New ProductsModel: L19M4P71; Voltage: 15.36V; Capacity: 80Wh / 5235mAh; Battery type: Li-ion; Cell: 4-Cell. (We only use grade A battery cells that provide up to 500 recharge cycles over the life of the battery. Come with screwdrivers.) Replacement For LaptopFor Lenovo ThinkPad P1 3rd Gen Series Notebook; For Lenovo ThinkPad X1 Extreme 3rd Gen Series. High Quality Materials & Packed With Safety FeaturesAll Mobik products are certified by UL / CE / FCC / RoHS for safety. We are so confident in the performance of our replacement laptop batteries, strict guidelines for compatibility, strict quality control standards and standards comp