There is really no need to wait for it to recharge to 100%. As @onthewayout said - you get 20% per day recharged. It is fine to be in the 5%-25% range - it just means your votes will be worth a little less. Not a reason to stop voting though, unless you are trying to get your votes to be worth more. (A vote with 50% voting power is worth twice as much as one with 25%.)
As I said in the post though, it is best not to get too bogged down in the details of the math, curation rewards, and voting power. Focus on engaging with the community and voting on the stuff you like.
Tim, I've been posting about this, saying that the error of HF19 was that people were convinced that they could only vote 10 times a day. Many people will not leave a comment if they don't upvote. Therefore, people stopped leaving comments because they felt like they were out of votes for the day. Total negative.
The way you explain it in this post needs to be exposed to the entire small minnow community. They're confused and missing out on the one penny curation. I remember, a month ago, when my vote became worth a penny, I was so excited!
All the newbies need to feel like they can vote freely.
Feeling free to comment and engage with others is vital, not only to the growth of individual Steemers, but to Steemit as a whole. HF19 has been so confusing in this regard.