It's a good idea to have a quality car battery charger on hand in case of an emergency. However, they all aren't created ...

Many chargers double as maintainers, but you don't need many amps just to keep a battery topped up. Photo credit: David Traver Adolphus / AutoGuide.com.

This battery maintainer is an all-weather charger, maintainer, trickle charger, and battery desulfator, making it perfect for all 12-volt lead-acid, flooded or sealed maintenance-free batteries.

Our Recommended Car Battery Chargers. Best Overall. NOCO Genius 1. Now 25% Off. $40 $30 at Amazon. $76 $30 at Walmart $30 at crutchfield.com. Credit: Gannon Burgett.

With a smart 12V trickle charger and maintainer, you can revive your car battery in a relatively short amount of time. And this one from GPED is discounted to $22 on clearance at Walmart , 56% off ...

This device works as a battery charger and maintainer and is ideal for a wide assortment of battery types and sizes. Nexpow F1000 1A Battery Charger, $20 (was $65) at Walmart.

You might want to consider, if you park in a garage, a battery maintainer to keep the battery fully charged. Many people use these maintainers with sports cars that only get driven periodically.