This is the EcoPower 4-Cell NiMH AA SBS-Flat Receiver Battery with a Receiver Plug. This battery features 2000mAh capacity is ideal for use as a rechargeable battery for your transmitter, as well as many other applications. The recommended charge rate for these batteries is 1C for the best battery life and run time.
Specifications:
Chemistry: NiMH
Voltage: 4.8 nominal
Number of Cells: 4
Capacity: 2000mAh
Weight: 111g
Dimensions: 60.4×52.6×14.9mm
Connector Type: Rx
Configuration: SBS-Flat
Max Charge Rate: 1C