We also spoke with a seasoned collector and curator to get the inside dirt on car battery maintainers ... it comes with both ...

There’s only one way to answer the question, “Is it my battery, or something else” when your car won’t start: Hook up the best car battery tester and get a readout of what’s going on.

But when the battery is old and past its service life, that won’t work, and it’s time for a car battery replacement ... Lift the hold-down strap up and out of the way and set it aside.

The day your car won ... glass mat battery. But it won’t hold a charge for as long and is less able to tolerate a deep discharge. AGMs are built to better stand up to repeated draining ...