CWK New Replacement Laptop Notebook Battery for IBM ThinkPad R400 7443 R61 7737 R61 7738 R61 7742 R61 7755 R61 7736 IBM ThinkPad T61 6378 T61 6480 T61 6481 T61p T61u(14.1 widescreen) IBM Thinkpad Condition: Brand New - Grade A cells Battery Type: Li-ion Voltage: 10.8 Volt (11.1 Volt compatible) Capacity: 5200mAh (Better than 4400mAh) 90 Day Money Back. Buy with confidence!