High Rate Batteries

High rate batteries are made specifically to deliver high power pulses for short time periods. In most batteries, such as lead-acid and Absorbent Glass Mat (AGM), there is a correlation between the depth of discharge (DOD) and the cycle life of the battery. Cycle life of a battery is the number of charge/discharge cycles it can sustain in its life and depends on the DOD that is allowed. If the discharge of the battery is kept to a lower percentage (approximately 50%), it will have more useful cycles than if it is frequently discharged to its maximum DOD (below 80%). 

The typical lead-acid battery provides 200-300 charge/discharge cycles depending on the operating temperature and DOD. High rate batteries can perform up to 400 charge/discharge cycles when operating at 68-77 degrees Fahrenheit at a 50% DOD with a 14-16 year life.

High rate batteries vs Deep cycle batteries High rate batteries are very similar to high cycle batteries. They are designed with valve regulated lead-acid (VRLA) AGM technology and are used specifically to deliver high power pulses for short time periods. Discharging below 50% can risk shortening the lifespan of the battery. They supply more current and recharge faster than deep cycle batteries. Deep cycle batteries use VRLA AGM technology, however, they are designed with fewer and thicker lead plates, allowing a depth of discharge to 80% without causing damage. They provide a lower, steady power over an extended length of time.