electric panels and winter vines and while electric cars and solar panels become more common, listhium batteresibute into our carbon footprint. now the development of a first rechargeable zinc battery, and says it will make use of abundant resources at significantly lower cost than lithium. first of all, give us a history lesson. a century ago addison tried to pioneer this technology. what were the limits he hit on? >> it's exciting that 100 years ago he filed the first patent. being theue for zinc one of the most signatures is the issue of re-charge ability. tryproblem with zinc as you to recharge it, it grows dendrites and that problem could never be solved. brad: so lithium ion is sorts ofle for all environmentally frilly technologies for wind turbines to solar panels. remind us with a problem is with them. >> lithium ion requires cobalt. so, lithium is a common vision of two metals. cobalt is mined in the congo. lithium requires cooling, it's expensive. and it creates explosions. so, there are multiple downsides to the issue of lithium. zinc is the new lithium. brad: isely, the supply of zi