What battery are you using (we need the specs)? Do you have a watt meter? Do you have a temp gun? What kind of connectors are you using? What type of radio are you using (2.4ghz or 72mhz)?

This is some good information to provide for troubleshooting. If you do not have a watt meter or a temp gun, it is not a problem but may leave some questions unanswered.