LESL410-9 - 9 cells - Laptop Battery For Lenovo ThinkPad T410 T420 T510 T520 SL410 SL510 Edge-E520 W510 W520  (6600mAh) Battery Type: 9 Cells Li-ion Capacity: 11.1V 7800mAh Color: Black Weight: 19oz Using highest quality materials including grade-A brand-new cells Meets and exceeds OEM specifications and lasts longer hours Package Includes: One unit of brand-new replacement laptop battery for LENOVO/IBM This product is CE & RoHS certified, so BUY WITH CONFIDENCE!!!