Why do traditional cars lack any decent ability to warn the driver that the battery is low or about to die?

Question

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

Answer 1

My battery had some cells die and it dropped to 8 volts. There was definitely warning icons in the dash telling me the battery needed inspection