Deep cycle batteries have thicker plates, so they last longer. They have the greatest life when they are not completely drained, then recharged. Golf carts also use this type of battery, so they do produce good amperage, just not 500 amps!

Starting battieries have thinner, closer spaced plates to increase the surface area. THis gives a lower internal resistance (higher cranking amps). But, thinner plates mean lower life.

2008 FWD Escape Hybrid