Redcat Racing HX-5000MH-B Version 4.0 5000 Ni-MH Battery-7.2V with Banana Connector 5000 Ni-MH Battery - 7.2V with Banana 4.0 Connector HX-5000MH-B Tools and Accessories : HX-5000MH-B 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.