Lenovo ThinkPad T420 4179 Replacement Laptop Battery | Low Prices, Long life
Battery for Lenovo Thinkpad T410 T420 T510 T520 SL410 SL510 Adapter Power Cord | eBay
Amazon.com: GHU Premium 48Wh Battery for Lenovo ThinkPad T420, T430, W510, and Lenovo 0A36303 - Fast Charging, UL Tested, 6 Cell, Reusable More Than 500 Times : Electronics