A car battery is a crucial component that plays a vital role in the operation of a vehicle. Its primary function is to provide electrical energy to start the engine and power various electrical ...

Consumer Reports tests batteries for life, reserve capacity, and cold performance. Some batteries perform admirably, but ...

️ Editor's note: This article was updated with new information in December 2025. Dead batteries are a predictable reality for any car that spends more time parked than driven. Battery discharge does ...

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. Skip the ...

You try to turn on your car, and it just won’t start. Maybe the dashboard doesn’t even light up. A likely cause: The 12-volt battery is dead. All cars lose a little battery power when parked. If you ...

If your car battery is three or four years old, the first serious cold snap could be the morning it quits. Here’s how to spot the warning signs. Cold weather exposes weak car batteries, increasing ...

The Topdon BT200 Battery and Charging System Tester showed up at exactly the right time. I’ve gotten a couple of sporadic check engine lights from a low-voltage code with no noticeable difficulty ...

These are the best car batteries for cold weather, based on Consumer Reports' extensive tests. Plus, expert advice on car ...

Batteries lose capacity over time. The process can be slowed down, but it’s inevitable, so after a few years, your EV won’t provide quite as much range as when it was new. The battery will lose about ...

As the electric vehicle (EV) market surges towards 2040, fueled by strong consumer enthusiasm, the need to address key concerns about EV range, reliability, and battery life has become critical.

My “unicorn” Volvo V90 plug-in hybrid wagon is almost four years old. Here’s how healthy its high-voltage battery is.

New solid-state technology offers higher energy density and faster charging. It’s so named because it does away with the ...