This is the ProTek R/C "High Power" 1S, 250mAh, 25C Micro Helicopter LiPo battery pack. This pack is a direct fit for the Blade mCP X helicopter and is only 1 gram heavier than the stock battery, providing you with an improved performance and longer flight times!
Type: Lithium Polymer
Voltage: 3.7V nominal
Connector Type: Ultra Micro
Number of Cells: 1
Dimensions (LxWxH): 42.9x17.23x6.15mm
Maximum Charge Rate: 1C (250mAh)
Maximum Continuous Discharge: 25C (13.75A)