I live in New Jersey. After searching, it seems that i can't get the Ego T Twist battery from any US vendor anymore. I assume this is due to the new regs although i i can't find anything on that. I CAN get the Ego T Twist from UK vendors. My question is, can i use the UK version with my USA USB charger or is there some sort of voltage difference between the two that would require a converter or something else? Is it the exact same battery that they used to sell in the USA?