That's not really how battery train operations work. And you'd need deep modeling to figure out exactly how much battery is needed and the tradeoff between extra battery capacity and catenary extensions. That's far beyond the scope of this forum.

It is not. If someone is suggesting battery power and then showing what is out there, the question needs to be whether it would work with Via's system. So, at what point would Via aquire these battery trains? How much of their line would be fed by some sort of shore power? How many trips a day would this one train make? Using all that, you could come up with some very rough numbers that for most of us, would help us understand the basic feasibility of it.

So, how much of their line would be electrified before they would bring a Battery train in service?

How much of their route would be not electrified?

How many trips of that route in a day would they travel it?

That number would be km per day that a train is without shore power.

Now, if you want to make sure we have all the information, then we would need to know how many km to charge the batteries to full, and if in the route is there enough of those km. If there iss not, then we need to assume that it will need to last most of the day and be charged where it lays over for the night.

This is kinda like how often do the engines get refueled. I am guessing it's normally once a day along the Corridor.