2PCS HRB 22.2V 100C Lipo Battery 6S 5200mAh XT90 for RC Car Boat Drone Airplane

2 x 22.2V 5200mAh 100C XT90 Lipo Batteries. Thisalso can solve the problem ofbig internal resistance when you received the new battery. And you should check the battery in 1-2 months.