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It does not zero out, it seems to just accumulate. It was a gift from a geek friend, and had zero instructions. I figured it was minimal cost to charge a phone.
I am going to put it on the inductive charger in my El Camino for a while now, just to see what it does then.
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Glen
50 Year member of the Porsche Club of America
1985 911 Carrera; 2017 Macan
1986 El Camino with Fuel Injected 350 Crate Engine
My Motto: I will never be too old to have a happy childhood!
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