HI All I am looking for a circuit or an IC to automatically control the continuous charging of a car / truck lead acid battery. Silicon chip magazine in August 1992 published a SLA charger designed for batteries up to 15AH. Am I correct in that I could take this as the base for charging a normal lead acid battery or do they require a different charge cycle? Roy New Zealand -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist