Redcat Racing 6V 2500MAH Receiver Pack Receiver Pack (6V 2500MAH NiMh Battery); Used with all: Rampage MT, Rampage TT and Rampage Rally models RC Car Parts : 50051 Genuine Redcat Racing Parts For troubleshooting and warranty information please contact a Redcat Racing Customer Service Specialist at 602-454-6445 or by emailing amazonsupport@redcatracing.com NOTE: Please read the User Manual before use.