CWK&reg; High Performance New Battery for Toshiba Satellite L645-S4059 Laptop Notebook Computer PC [6-Cell 10.8V] 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!