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Try to get it to over 70 or even 80 if you are active everyday on Hive. I keep mine over 80 for the most part but sometimes hard to manage that..

That's my target 🎯 : > 80%

The voting mana recharges over time.
Powering up HP will make it recharge faster.

Thanks for the tip about powering to recharge faster

You can do a lot more after powering up HP. It increases your upvote, etc.