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I try my best to keep it around 10-12 hours-ish just so my mana comes back in time for the morning hahah! but some weekends it's drained below 80 for busy times, can't help life getting in the way sometimes!

Right, that's probably what I should practice too. Letting it recharge at least near fully overnight, use it much of the day and then leave it again to recharge during the night