I believe Sanyo is the largest battery manufacturer.
Sony is correct. They actually make the individual cells to manufactures to assm to their specs. Invest in a small inventor who is going to invent a battery that is the next generation and will actually advance the electric car to a feasible alternative.It is the one factor that is stalling the advancement of current electronics. We could have a cell phone as small as a stamp right now but battery technology keeps it at today’s size . I have though of the same investment idea and am going with the next basement Bill Gates for battery development. It truly will change the world when we get it.
I agree sony is the biggest manufacture of lithium batteries. which are used in power tools like cordless drills and cordless power tools .
I know one distributer which supports sony batteries for there power tools is