No, every day it charges only 20%. One vote is 2%, so if you do 10 upvotes a day at 100% power, your battery will be 80% at the end of the day and next day it would charge to 100%. If you do 11 upvotes, next day it will be 98% (78%+20%). These are approximate numbers but can be used as a rule of thumb. Hope it helps!