If you look at most of the use cases for the DUO chargers (at least in RC car racing), you would probably see that most times they are used with a discharge bank. I'm sure Junsi recognizes this. They can save money with fewer/smaller components (more profit as the new chargers are more expensive) and save some weight too. I'm quite happy with the new design. My 406 DUO looks like something Nintendo designed in the 80's. If the software and menu structure are the same as the current DUO models, that's a huge let down.