
I recently had to replace a battery which put me in a dilemma. weak. I have one now and will review it more carefully in the future. This is the ultimate in simplicity, I mean, before you start the car, plug it into the cigarette lighter, it shows the voltage, start the car, it shows the voltage and status of your alternator (NOTE: the toggle switch must be in the middle/unmarked position to use the alternator function that's all it will tell you straight away if your battery or alternator has a problem so for EASY USE + PERFORMANCE + VALUE it gives 5 stars all day.

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