Amsahr 33YDH-05 Replacement Battery for Dell 33YDH,inspiron 17 7778/7773/7779(15.2V, 56Wh, 3500mAh, 4-Cell) - 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 3500 mAh, 15.2 Volts, 56Wh & 4-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 Replacement Laptop Battery for Dell 33YDH Compatible Non-OEM Long Life, Li-ion Battery Rechargeable with No Memory Effect and Power Surge Protection. Exclusive Offering of High Performance, Long Lasting. Durable Grade A Cell Battery.