4s 1600mAh 25C with XT60 connector.
Due to the increased difficulty in posting Li-Po batteries, we have instead decided to recommend a suitable battery from an alternative supplier. Please see the link below for the details of a battery that will match your Roprey:
A Lipo (Lithium Polymer) battery for powering the Rocrow and all of its derivitives. A single charge can power the model for approximately 5-10 minutes depending on throttle used. This battery is the perfect size and weight to fit the Rocrow, giving it good balance.
See the description of the charger for charging instructions.