RCJuice HobbyStar XT60 Series Connector, No-Wires This is a connector for connecting two batteries with XT60 connectors in series. With two batteries connected in series you will have double the voltage and power of a single battery, but with the same run time as one battery. Double the voltage and power of a single battery, but with the same run time as one. Compact "No-Wires" design