amsahr Replacement Battery for Lenovo Yoga 2 Pro, Ideapad Yoga 2 pro 13, Y50-70AM-IFI, Y50-70AS-ISE, 121500156, 21CP5/57/128-2, L12M4P21 (6 Cell, 7400 mAh) - Includes Mini Optical Mouse Includes Mini Optical Mouse with Retractable USB cord and ONE Compatible Laptop Battery 18 Months Manufacturer Warranty, 100% Compatible Non-OEM : Lithium Ion (Li- ion) Long Life Battery: Rechargeable with No Memory Effect and Power Surge Protection. 7400 mAh, 7.4 Volts & 6 Cell Protective Retail Packaging, Each Product is Sealed with Anti-Static Shield Sleeve. Exclusive Offering of High Performance, Long Lasting, and Durable Grade A Cell Battery