LED converter for an emergency lighting unit, comprising a LED driver configured to supply a current to a LED lighting device , an energy storage interface configured to connect the LED converter to an energy storage device , wherein the energy storage interface is configured to connect to energy storage devices of at least two different types, a charging circuit configured to charge the energy storage device , wherein the charging circuit is configured to set at least one energy storage management parameter according to the type of energy storage device connected by the energy storage interface , and a control circuit configured to determine the type of energy storage device connected by the energy storage interface and to control the charging circuit to set the energy storage management parameter according to the determined type of energy storage device , and characterized in that the at least two different types differ by battery chemistry of the energy storage device , and that the energy storage interface is configured to connect to a temperature sensor of the energy storage device , if such energy storage device comprises said temperature sensor , and that the control circuit is configured to determine absence or presence of the temperature sensor for determining the type of energy storage device connected by the energy storage interface , in case presence of the temperature sensor is determined, to determine the type of energy storage device as a first type of energy storage device , in case absence of the temperature sensor is determined, to determine the type of energy storage device as a second type of energy storage device , and in case presence of the temperature sensor is determined, to determine an electrical characteristic of the temperature sensor for further distinguishing between different types of energy storage devices , wherein the electrical characteristic is a resistance value of the temperature sensor . a LED driver configured to supply a current to a LED lighting device , an energy storage interface configured to connect the LED converter to an energy storage device , wherein the energy storage interface is configured to connect to energy storage devices of at least two different types, a charging circuit configured to charge the energy storage device , wherein the charging circuit is configured to set at least one energy storage management parameter according to the type of energy storage device connected by the energy storage interface , and a control circuit configured to determine the type of energy storage device connected by the energy storage interface and to control the charging circuit to set the energy storage management parameter according to the determined type of energy storage device , and that the at least two different types differ by battery chemistry of the energy storage device , and that the energy storage interface is configured to connect to a temperature sensor of the energy storage device , if such energy storage device comprises said temperature sensor , and that the control circuit is configured to determine absence or presence of the temperature sensor for determining the type of energy storage device connected by the energy storage interface , in case presence of the temperature sensor is determined, to determine the type of energy storage device as a first type of energy storage device , in case absence of the temperature sensor is determined, to determine the type of energy storage device as a second type of energy storage device , and in case presence of the temperature sensor is determined, to determine an electrical characteristic of the temperature sensor for further distinguishing between different types of energy storage devices , wherein the electrical characteristic is a resistance value of the temperature sensor . <EOS>