Bastens LiPo 7.4V 5000mAH upgrade battery and balance charger kit for the Traxxas 2x4 4x4 VXL Stampede - Rustler - Bandit - Slash - XO-1 - 1/10 E-Revo Brushless - E-Maxx Brushless - a must upgrade or a high capacity alternative replacement Velinion VXL-3s ESC Brushless 3500 motor ready