Howdy, I will preface my comment by saying I don't own Hyper Scrambler 2 so I am no expert. I did order one with a dual battery and in my searching around I came across some information on how the dual battery system works. Apparently the power is drawn from the batteries equally. In other the words it treats both batteries as one big one. I also heard that if there is one battery with a lot more power than the other. The bike will draw from the battery with more charge until they are even and then it will begin to draw from them simultaneously again. Like I said I am no expert and I'm pretty sure this is what i heard about the battery system in my hours of searching ebikes over the last month. If anyone thinks I'm getting it wrong then definitely let me know. I'm always open to learning about new things. Especially about ebikes and especially about the Hyper Scrambler 2. I cannot wait to get it!