Hello Hive account@web-gnar
good question. your voting power meter determines how much money each up-vote gives.
at 100% you give your full potential vote.

from my experience, each vote costs around 2% and takes about an hour to two hours to recharge back to a 100% . (I haven't measured it exactly just yet)

I also tried draining it fully, and it took about 5 days to fully recharge.
either way, it is free money that you can give others you like on here as well as your friends and family :)

if you let your voting power sit at a 100%, you will be wasting free money. So that is the worst u can do.
always vote when it gets to a 100 and never let it just sit there.

happy Steeming! :)
and thank u for stopping by my blog!