Help: Traxxas Rustler lipo


Hi everybody,

I am new to the RC world.I just bought a rustler VXL and I want to go faster.
I have actually the stock batteries - Power cell 8.4v 3000mah and I need to know I upgrade my rustler vxl battery to 11.1V lipo, Can I use my 8.4V 3000mah Traxxas plug or all of lipos need to modified Traxxas plugs and should upgrading my battery charger? Which charger is fit?