Go to Amazon Sites : br br LESL410-9 - 9 cells - Laptop Battery For Lenovo ThinkPad T410 T420 T510 T520 SL410 SL510 Edge-E520 br br Battery Specs 9 Cells Li-ion Capacity 111V 7800mAh Color Black br Battery meets and exceeds OEM specifications and lasts longer hours br Battery package includes One brand-new generic replacement battery for Lenovo ThinkPad E420ThinkPad E425ThinkPad E520ThinkPad E525ThinkPad T420iThinkPad T430ThinkPad T430i br Battery offered in this listing is CE RoHS certified so you can shop with a peace of mind