Lectron Pro 11.1V 950mAh 30C Lipo Battery with JST Connector for the Blade 200 SR X, CX4, T-Rex 250
This 3-cell 950mAh lithium polymer battery pack fits right into the Blade 200 SR X with no modifications necessary, and will give you lots of extra runtime! 30C continuous discharge rate of 28.5 amps with 57 amp bursts.