I had two ICE's and bought the DUO to replace them. Couldn't be happier, I just had to buy the adapter so I could do the update via the PC. The only thing I don't like is the DUO's manual sucks, but the charger itself is very good. Well worth it. I use a Pro Peak 20 Amp Dual Output Digital Power Supply for power and it has no problem doing 2 2S 8000mah packs at the same time.