hello i used to be into tiny rcs and stuff and im getting back into it. i just dual celled a car. i built a new charger too. when i charge it for 45 seconds or longer and take it off it like suddenly loses all the power it charged up and when on the charger it works fine except when i push backwards it uses the dual cell power and when i push forwards it uses regular power. if any body has some suggestions or answers please reply it will be greatly appreciated. thanks