9-Cell Extended Laptop Battery for Lenovo IBM Thinkpad E40 E50 0578 E420 E425 E520 E525 L410 L412 L420 L421 L510 L512 L520 Sl410 Sl510 W510 W520

this 9-cell Lenovo replacement battery is rated at 8800 milliamp hours and will give you about four hours of runtime depending on your energy use the mah or milliamp hour rating indicates how long the battery will run on a charge so the higher the mah number the line of the battery will run all of our batteries are brand new with Samsung Power Cells a Texas Instruments computer chip and are never used or refurbished Samsung offers the highest quality power cells on the market that meet or exceed the quality of the brand-name batteries all batteries from laptop battery Express come with a 30 day money back gaurantee and a full 12 month warranty with the service life of about two to four years if you're finding less expensive batteries on line please be aware that it is because they use cheap quality power cells inside the cartridge that can easily wear out in six months even if they have