Genuine Replacement Battery for Lenovo ThinkPad L13 and X1 Carbon Business Series Restore your Lenovo ThinkPad L13 Gen 3-5 or X1 Carbon 12th Gen to optimal performance with this premium 46Wh Li-ion replacement battery. Specifically engineered for Lenovo's business laptop series, this L21M4PG1 compatible battery delivers reliable power for professional use with stable 15.36V output and efficient 2995mAh capacity in a 4-cell design. Perfect for business professionals requiring dependable performance across multiple ThinkPad generations.