. >> rfporter: the same battety cells that p#per eigarettes, nce e cember tre have bebeoard 52 repororinindents invoingg52 hoverbrds catching on fi jay whitacre is a profesr carnegeg m mlon univsityty he said the demand to make these products cheapap andore powerf has led some compies cututorners. >> what we're e eingight now s is a situauaon where maybe some of these batteries are simply nomade to the sasa standara2as baery that are made say, at sony y panasonic, which have much more stringent quality control. >> reporter: whitacre sasa if ium-ioiopowered itits like rettes and hovererards a considerer high-power applicatioioioio ififir b b bries are badad desiededhen n ey arereharg th can orheat. is it something g at the usur isis ing incorrrrtly? >> no. f in genal, withthhis nd of technology, it's v vy difficulte user t tbe a4afault. lde a goododkahat ehcell lives in.ecbof e e ininhod bebe sisied to prott ththusus >> reporter: industry advocates say these incidents are still rare and t tt ususs shld always use`eompatible batteriess anchargers. thth say tavoid bttery contact t th metal oects,