Most people are familiar with the conventional “SLI” ) Starting, Lighting and Ignition) lead-acid battery which delivers the high amp energy necessary to provide maximum starting power. Once the engine has started, the alternator recharges the battery. However, repeated cycling, as well as the continual process of discharging and recharging, eventually weakens the :SLI: battery which provides concentrated starting power, the deep cycle type battery supplies a constant but relatively low amount of current for a long period of time when an extended power supply is preferred.
Battery technology covers every automotive need from original equipment for Australian manufactured vehicles to batteries designed to suit specialised requirements.
This article is found in the Virtual mechanic CD Rom
You can download it for the price of a latte, but you will learn not to buy a lemon
By Darren Gow-Brown, Melbourne Australia