Just because you’re on a tighter budget doesn’t mean you can’t get a top-notch battery maintainer. Still, for most home garages, you’re not going to find a better fit than this DieHard battery charger! While the charger can charge those types of batteries too, there’s no arguing that they don’t do as good of a job as an AGM or gel battery-specific charger. The only real complaint with this battery charger and maintainer is that it doesn’t have any settings specifically for gel or AGM batteries. No matter what version you choose you get extremely thick cables for a stable connection, and the chargers themselves come with both overcharging and reverse polarity protection features.Īdd in the fact that this smart charger and maintainer is lightweight, portable, and long-lasting, and it’s not hard to see why it made the top of our list. There are multiple charging amperages you can choose from, but we recommend sticking with the 2-amp version for a battery maintainer. This DieHard 71219 Shelf Smart Battery Charger and Maintainer is a phenomenal mix of price and quality. DieHard is one of the top names in the battery industry, so it’s no surprise that they also make a top-notch battery maintainer.