I had my doubts as I have another battery meter and it shows a higher percentage than this one. Spring. After testing both, I found that this counter is indeed correct. Remember folks, different gauges calculate "full" based on different voltages. I use this to monitor my RV batteries and it works fine as it doesn't take into account the operating voltage (alternator output). I also like the fact that I don't have to reach back to turn it on or off like other models do. There is an on/off switch on the front.
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