The badges are run as part of a batch process, so give it some time, perhaps it will pick it up. 

Electorate [requires that][1] you vote on 600+ questions **and** 25% of total votes are on questions. 

> Voted on **600 questions and** 25% or more of total votes are **on questions**.

Are you sure your votes meet that criteria ? 


  [1]: http://superuser.com/badges/49/electorate