I have the Onyx 230 charger and it does'nt have a balancing port, but I read on Orion's website you can balance each cell individually. so if you have a Orion 5000 put the + into the + hole and the - into the balancing port hole and set the charger for 1 cell and 2500mah. and when that's done put the - terminal in the - hole and the + terminal in the balancing port and charge the same way. I do this after every race just to balance and extend the life of the batteries, I've been racing with the same lipo packs since last July. Or just buy the Checkpoit balancer which will practically work with every lipo charger.