Abstract: A conversion module system operable in any standard lantern which is generally powered by a single 6 volt "La Clanche" type battery. The system accomodates four rechargeable "D" size batteries primarily, but carbon-zinc or alkaline batteries can be used also. This module system therefore is a container of said batteries connected in series within, producing 6 volts D.C. Its dimension conforms closely, but not necessarily to the exact size of the 6 volt "La Clanche" type battery. This module, when containing rechargeable "D" size batteries, will produce at least 500 times longer lasting power than one ordinary carbon-zinc throwaway battery.