Hahaha well tentatively let&#x27;s say EFF...<p>Rhetorical flourishes aside, I&#x27;d love for you to be right and I&#x27;m perfectly content to be convinced that you are. What specific technologies or materials will get batteries over this hump? Please don&#x27;t say lithium-ion because although they seem OK for phones I can&#x27;t seem to buy one for a power tool that will last a year.