What is a battery maintainer
A battery maintainer is often confused with a trickle charger. A trickle charger provides a constant low charge rate to a battery, but is not smart enough to know if the battery is fully charged. Continuing to charge a fully charged battery can cause permanent damage. That’s why you want a battery maintainer.
A maintainer won’t overcharge your battery
A maintainer will check the condition of your battery periodically and charge only when it needs topping off. It can be left on all the time without harming your battery.
Battery tender is a well regarded brand
Battery tender makes several versions of their battery maintainers depending on the size of the battery or whether you have multiple batteries.