Battery charger with light emitting diode indicator utilises microcontroller based mosfet based smps technology to provide optimum performance for longer period of time. The battery charger requires 230v ac to operate efficiently at a frequency rate of 50 hz. The battery charger is fitted with light emitting diode indicator for indicating ac mains, ac input low voltage and high voltage and reverse polarity. Battery charger with light emitting diode indicator can function in different temperature ranges varying from 0 degree c to 45 degree c.