When independent laboratories can reverse engineer the batteries, something else would also happen:

They will be copied by the Chinese, Indians, Russians, etc. and nobody will make any money.

The copiers will make loads of money and when the market develops and the price is squeezed it will maximize the benefits to society and spread the technology as wide as possible.

But the intellectual property systems and business culture need to honor the original developers enough for them to prosper so that other people are encouraged to innovate.