I have an extra wall charger and car charger left over from my palm pre (OEM). However, the guy at the Sprint Store informed me that I shouldn't use the palm pre wall or car charger with the Evo as it may not have the right ampage/voltage. Then he proceeds to sell me a Universal Car Charger, in fact the same universal car charger they told me would work with the pre last year. Am I getting ripped off here? Will the pre car/wall charger work just fine with the Evo? Thanks.