If you want them to not use all their power you can technically vote 10 times a day then with each vote 2% is used as of his power and takes 2.4 hours to recoup which means you will be at 100% power again in 24 hours. This is good to keep in mind once your vote is about 1 cent and more since at 1cent you like it if people vote and you can see that it is a full cent (psychological), currently I have the same value of vote at 75% (below 75% I don't vote a full cent) as I do at 100% and for me to keep that 80% power level as a baseline , because I like it, then I get an extra 2 votes out :) and still recover in 24 hours. This I accomplish by using busy.orgs slider to vote at a percentage. and since steemit.com uses your master password as the actual password it is just wise to not really use steemit as your main interface.
If you want them to not use all their power you can technically vote 10 times a day then with each vote 2% is used as of his power and takes 2.4 hours to recoup which means you will be at 100% power again in 24 hours. This is good to keep in mind once your vote is about 1 cent and more since at 1cent you like it if people vote and you can see that it is a full cent (psychological), currently I have the same value of vote at 75% (below 75% I don't vote a full cent) as I do at 100% and for me to keep that 80% power level as a baseline , because I like it, then I get an extra 2 votes out :) and still recover in 24 hours. This I accomplish by using busy.orgs slider to vote at a percentage. and since steemit.com uses your master password as the actual password it is just wise to not really use steemit as your main interface.