MicroMall(TM) 2pcs Upgraded Syma X5C X5 3.7V 500mAh 25C Lipo Battery 3.7V 500mAh battery Model: X5C.X5A Suitable for: X5C.X5A Dimensions: (1.65 x 0.98 x 0.35)" / (4.2 x 2.5 x 0.9)cm (L x W x H) Weight: 0.59oz / 17g