Well, no electricity, and no internet connection would kill BTC for sure! You wouldn't be able to make any transactions without these.
Other issue can be all the countries in the world ban BTC, but this will not restrict it's circulation, as no internet connection do!
Yes, you have a point, no electricity, no access of internet, no interenet you cant work/use bitcoin which may shutdown bitcoin. But thats not gonna happen, Electricity is always on around the world, It uses and important for all, and even for BPO campanies or other bussiness firms which uses internet. It may kill those companies as well if there is no electricity, which is not allowed to be happen for it is for the economy. And same for the bitcoin as well.