The Shure SM58 is a legendary microphone. I think one can say that. And Shure makes sure to feed that legend: SM58 50th Anniversary. I guess I am in good company considering all the big names mentioned there.
The SM58 is a dynamic microphone and doesn’t need a battery. Thank God :-). Since 2012 when I got the SM58, the BK-1 is backup only. I am very happy with the sound and the robustness of it. I guess I will stick with that one for quite a while.