Lenovo IBM ThinkPad T420 9 cell Extended Life Replacement Battery
Lenovo ThinkPad T420s Review | Digital Trends
Laptop Battery For Lenovo ThinkPad T430S 2 Years Warranty - BatteryMall.com
Upgraded the twins today. T420 got 16gb ram and a sled battery. 9cell + sled = 17hrs battery life. T480 got an extra 16gb of ram, up to 32gb. Happy with the
Laptop Battery for Lenovo Thinkpad T410 T420 T510 T520 W510 W520 SL410 SL510 PC | eBay