You can test a battery if you go under the hood and connect up the right meter to measure the battery integrity but why can’t a modern car employ the technology easily? (Or maybe it does and I need a new car)
In: Engineering
Many cars measure voltage at turn-on and can signal you. The most important test, trying to start the car, already has a “warning”, wken the car doesn’t start. Without a more sophisyicated test, you can’t tell “low charge” from “bad battery”. A bad battery is pretty obvious, but predicting it doesn’t work unlesss people are going to replace t_eir battery when the car says “battery failure within a month”.
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