Deep cycle golf cart batteries are engineered to deliver sustained power through repeated deep discharges—up to 80% of their capacity—making them ideal for extended use compared to starter batteries, which provide short bursts of high current. Predominantly lead acid (flooded or sealed AGM) or lithium ion, these batteries offer 500 1,500 charge cycles, with lithium ion variants lasting 2 3 times longer due to their resistance to sulfation, a common issue in lead acid models that reduces capacity over time. Key to their performance is thick lead plates (in lead acid) or stable electrode chemistry (in lithium ion), designed to withstand the stress of deep discharge. They operate at 36V or 48V, matching most golf cart electrical systems, and feature low self discharge rates—losing only 1 2% of charge per month—ensuring readiness even after periods of inactivity. Maintenance requirements vary: flooded lead acid batteries need periodic water top ups, while AGM and lithium ion are maintenance free. For users, this translates to reliable power for full day rounds of golf, resort tours, or patrols, with consistent performance until recharging is needed, making deep cycle batteries a foundational component of golf cart functionality.