1S300-35-L Common Sense RC Lectron Pro 3.7V 300mAh 35C 1S LiPo Battery Pack for Blade mCP X. This 1-cell Lithium Polymer 300mAh battery pack is great for tons of applications, and it fits right into the Blade mCP X with no modifications necessary!

 - 35C continuous discharge rate of 10.5 amps with 16 amp bursts
 - Includes Ultra Micro connector
 - Dimensions 45mm x 13mm x 4mm
 - Pack of 2