I was at the track 2 weekends ago and there were two brothers charging 4 4S packs at the same time. You would use that if you had a track day for sure. They ran 12 races between both of them with 6 batteries. That charger was on all day long.

I'm not saying the hyperions aren't good chargers. For the price, the iCharger and power supply is hard to beat. You can charge at 20amps with that ps.

And epBuddy makes that charging and balancing lead to sell with the chargers. But overall I picked the charger for the power. It puts down some serious power for the price.