Oneda New Ultra High Capacity Laptop Notebook Battery for ThinkPad T400 R400 T61 T61p T61u R61 R61i R61e ; 42T5225 42T5227 42T5262 42T5264 42T5229 Replacement batteries Pack Brand: Oneda; Battery type: Li-ion; Voltage: 10.8V; Cells: 6-cell; Actual Capacity: 4400mAh/48Wh; Color: Black. Improve the service guarantee, Satisfaction guaranteed and backed by a one year replacement warranty. Oneda new high-quality batteries, 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery. Grade A cells ensure fast charges and low power consumption; Built-in circuit protection. Automatic power cut off at high electric current, voltage or temperature ensures safety and extended battery life. The actual operation time will depend on how much electricity is required by the device and how you use it.