hello there new to this trickery stuff ,getting one of these delivered next week ,does anybody know how many 18650 batteries are in the 60 volt 20ak pack ,16 make the 60 volt nearly but the amps are way out so prob 64 x 18650 batts or am i way out ,or are the 18650 batt really high ampage most are about 3500 miliamp? ,many thanks john