SPECIFICATION: Model Name: 51Wh Standard Rechargeable Li-Polymer Battery Type G5M10; Technology: 4-cell Li-Polymer; Voltage: 7.4V; Capacity: 51Wh; Weight: About 13oz / 0.8lb; Condition: New; Packages includes: 1PC laptop battery(with free screwdrivers for easy installation) WARRANTY & SUPPORT: 1 Year Warranty, replacement or refund supported if any battery issues. 24x7 Email Support.