I've seen some reviews that say you can't turn it if the battery gauge is wrong. And that's if the box is right, but all you have to do is go into the settings, make adjustments, and it'll do exactly what you want, accurate and customizable. The only positive was that the power cord broke when I fiddled with it during installation. I was too rough with it, it's very delicate in that regard. I had to solder directly to the board and now everything works fine.
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