I think you will be very happy with the Hyperion chargers with the built in balancer. Don't do what some people have done, when you get your setup look at the volts before you do anything. They should have at lest 7.6 volts. Charge them until your charger drops to 1 amp then stop the charge and dis-charge them at 5 amps down to 7.6 volts. Then charge them all the way up and use them. This is called a soft cycle and should be done before the first time you use them in your Slash. If you are not sure about something stop right there and ask for help. Your going to have so much fun you will have to have yours ASAP