Looks like awful lot of work to create such battery packs. I guess next step is to automate general assembly and dissasembly of battery packs via some smart AI robotics.
The problem is that it doesn't scale; unless you have quality and reliability guarantees on the batteries, you won't be able to sell it in anything but unregulated markets, meaning that demand will always be low and investments in "smart AI robotics" will never earn themselves back.