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Thanks! I will keep upvoting. Is there a time, when my upvoting power will be 0% and I won't be able to give any upvote?

I have read this before. And thanks again for give me the link. I am still little confused. If I vote with 100% voting power, shouldn't it be 0% after one vote?

No!
After a 100 % upvote your voting power decreases only by 2 %! (And of course will recover again.)

Oh really! That's nice. And good to know. You are really helpful!