We compare AGM batteries to lithium batteries to help you know what to look for when buying new batteries for your boat.

A battery maintainer will charge as needed, automatically. Advanced maintainers, often called “smart” chargers, typically have modes to address the needs of absorbed glass mat (AGM ...

Life test measures how a battery endures repeated charge-and-discharge cycles at hot-climate engine-compartment temperatures. The more cycles endured while maintaining a higher voltage, the higher ...

Life test measures how a battery endures repeated charge-and-discharge cycles at hot-climate engine-compartment temperatures. The more cycles endured while maintaining a higher voltage, the higher ...