Was thinking of getting a Kgo the next time I needed a new battrey. On some of the sites that sell Kgo's they have a waning that they can not use a ego charger. WHY not? The site also sells seperate chargers for Kgo's, but do not say any thing about not using them on Ego's. Are the chargers reversied in the +/- wiring or something else? Was also in maybe getting a Riva- same problem with chargers?