I'm starting my battery upgrade project. A hobby one. Not sure if I'll ever finish this but will publish any progress and will answer any questions I can.
So first... there are some hobby projects around installing an extra battery in parallel or replacing all the cells with MMCs having more capacity and complains about its impossible to make the car thinking of the real mileage thus requiring some effort like unplugging 12V battery to pull more energy from the traction one.
I've started from resolving this and here's what I've got...
I was able to make it thinking it has a much larger battery really cheap. Need to drive it for a while and see how it behaves on chademos with a hack like that.
Next, I'll need to buy cells for repacking and do the whole thing. Sounds like a long story. Let's give it a try...