so let me see if iv got this right. you plug the battery in. turn the ESC power switch on and within a second it looses all power as if the battery is dead?
you could try a receiver pack but to me that sounds more like an ESC problem. has the ESC been run to hot? has it gotten wet? have you hooked up the battery backwards? have you left the battery in and connected for a long period of time? are the connectors on the battery and ESC in good working order? BEC's don't just crap out for no reason.
what electronics do you have and what car are they in?