Been pondering on whether to get a dual charger or just continue using my 2 Thunder AC6 chargers. I usually just connect 1 battery to one charger and another battery to the other charger and let them go. I do have 4 4s batteries two for one car and 2 for the other car. But Im just a basher on my backyard Track and usually charge the 4 batteries and Run 2 packs through one car and 2 packs through the other car and I'm usually done for the day after that. Would I benefit at all by getting a dual charger or just stay with what I got?