I'm trying to diagnose which component on my car is draining the battery. I have a Kill-a-Watt which works great for 120VAC, but this is of course 10-15VDC. Is there some sort of similar device I can buy and wire it in series with the load that will track current usage in the same way? My multimeter works fine, but I'm looking for something that I can leave plugged in for a few days rather than just doing spot checks.
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