If Apple keeps the same battery capacity as the current 16” MBP, then the M2X 16” MBP will probably have 30+ hours of battery life if you extrapolate the difference in battery size between the 13” and 16“ MBP. That is not bad at all.
That depends, if it’s a redesign then maybe. But if they’re planning on using the same battery (which may still be possible even with a redesign) then they already have a well established production process. Changing that tooling at the factory would likely offset any cost.Seems likely Apple would shrink the battery some to save on cost and/or weight, but the battery life should indeed be impressive.