I have been given a 1981 Nikko Caribic Star speed boat. It wasn't in going conidition, wires disconnected and in need of some repair etc. I've done the repairs and gutted the old circuit board, which I guess was the receiver and speed controller. I've installed a new speed controller, receiver and rudder servo. The twin motors seem to run OK. However, I'm not sure what battery power I need. I've tried six AA and a 9V but both last only 5-10 minutes max. Has anyone got/had this model and if so what battery should I use.
I got the boat thinking it would be good for my 5-year-old grand-daughter to play with.