depth of discharge & cycle life Each battery has a certain life expectancy based on a number of cycles (or number of times used). Many factors affect the cycle life (battery technology & construction, charging method and ambient temperature) but it is the depth of discharge a battery experiences that is of key importance. In short, the deeper the discharge, the shorter the life span of the battery. Thin plated batteries which suffer 100% discharge will last only a small number of cycles. A more technically advanced AGM or Gel battery however offers more cycles and can last up to five times longer than a conventional battery.
