Yes, this is our battery size. But even half the battery is quite expensive.
I also thought about a custom battery, but it is a too hard work, to assemble a large battery capacity, there is not enough space in the box, and if you make a new box, there is no more space under the car.
One way is a put a custom battery in the trunk.
Maybe there are some ideas?
By the way, does anyone know: can we drive the car, if we disconnect half of battery?
Sorry for offtopic.