New Replacement Laptop Battery for Lenovo Thinkpad T420S T430S T420Si 430Si High Performance By WorldPlus Original Product by WorldPlus Voltage: 11.1V Display Capacity: 3600mAh Brand new High performance Replacement Laptop Battery By WorldPlus using a high quality cell of A grade Remaining amount display is possible Fully circuit protection: over current protection, Prevention function for over-discharging and overcharging 1-Year warranty from the date of original purchase Compatible modelLaptopThinkpad T420S, Thinkpad T420Si, Thinkpad T430S, ThinkpadT 430Si