@johnlogic it could be, but high capacity batteries are now a mature technology and some sort of standardization of voltages, currents, form factor, etc, for bulk energy storage seems beneficial. We'd no longer need different chargers, no lock-in to a product range, while not having to worry about replacement batteries if that manufacturer goes out of business turning the tool into e-waste. I figure if they can do it for something as incredibly complex as USB, we should be able to do it for batteries.