amsahr&reg; Extended Performance Replacement Battery for Toshiba PA3832U, Dynabook R730/B, Dynabook R731/B, Dynabook R741/B, Dynabook RX3/T9M, Portege R830, Portege R835(6Cell,4400mAh) 18 Months Manufacturer Warranty, 100% Satisfaction Guaranteed ( A saving of $18.97 ). 100% Compatible Non-OEM : Lithium Ion (Li- ion) Long Life Battery: Rechargeable with No Memory Effect and Power Surge Protection. 4400 mAh, 10.8 Volts & 6 Cell Protective Retail Packaging, Each Battery is Sealed with Anti-Static Shield Sleeve. Exclusive Offering of a Durable, High Performance, Extended Life Grade A Battery