It’s going to depend on your living climate. Right now it’s pretty humid where I live…I keep mine in an enclosed closet and it lasts for around 5-7 days before needing to be recharged.
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Superb, same here! Thanks
Ok so it arrived and works pretty well.
In a standard mid-sized cupboard it keeps humidity at 50-55% which isn’t bad.
In a safe though it took it all the way down to 37%.
Is that too low for cards?
I read somewhere sweet spot is around 45-50%
I believe anywhere from 40-50% is ideal. A good test might be to test the humidity of your safe without the dehumidifier. You might find that your safe’s seal is good enough