Lectron Pro 7.4 volt - 5200mAh 50C Lipo Battery Pack for the Traxxas Slash and Slash 4X4 models, E-Maxx Brushless Edition, E-Revo Brushless Edition, and Spartan with Traxxas-type Connector High-end performance and reliability at an affordable price Perfect for 1/10 scale cars, trucks, and buggies Great choice for the Traxxas Slash and Slash 4X4 models, E-Maxx Brushless Edition, E-Revo Brushless Edition, and Spartan Features a huge capacity for extended run times and a gigantic C rating so you'll have all the power you'll ever need Includes a Traxxas connector on the discharge leads