4s 1600mAh 25C with XT60 connector.
Due to the increased difficulty in posting Li-Po batteries, we have instead decided to recommend a suitable batteries from an alternative supplier. Please see the links below for the details of the batteries that will match your Roprey; there is no real difference between them;
These batteries will power your model for up to 10 minutes for a gentle practice session, and 4 minutes at full throttle. We do not recommend using larger batteries, the increased weight will lead to reduced performance.