Bowing certainly has the monetary resources to build its own batteries right here in America, using American labor and expertise.
There are several reasons why manufacturing is making a general come back right here in America.
One of the more ethereal and therefore harder to define reasons is patriotism itself. But, it is one of the reasons that both liberals and conservatives can get behind. Especially as the US was the greatest manufacturing nation the world had ever seen at one time, and that was the main reason why the US was the Arsenal of Democracy that was the main factor in the allies winning WWII!
Another more practical reason is the constantly increasing cost of shipping. It is certainly a lot less expensive to ship manufactured goods across a state or even a city that it is half way around the world!
And finally, there is the major issue in this case. And that is the very important issue of quality assurance (or quality control to the less educated in this important area). It is a whole lot easier to both establish and maintain quality assurance on manufactured products right here in the USA close to the places where the actual industry is located than it is to use outsourced companies throughout the world.
Yes, it probably costs a little more initially, but in the long run, and capital products such as either the automobile industry or aerospace industries produce are absolutely long term products. In the long run it is not only less expensive but a lot better on the all important reputation to manufacture right here in the good old USA, using the best and most productive workers in the world, than it is to outsources such important products!!