Abstract: An electric vehicle (4) with a rechargeable battery package (5) and a recharging system (1) for recharging the package (5). The package 5 has a plurality of rechargeable cells (50) and an integrated RFID tag (51) that is powered by an independent lithium-ion battery and has first and second memory areas. The first memory area is configured to permanently store identification data specific to the unique identity of the package (5). The second memory area is arranged to accumulate and store data relating to charge and discharge profiles for the package (5), operational conditions reflecting use of the package (5) during at least a portion of its lifetime, an event log recording operation of the package (5) outside of its recommended use parameters, energy status information for the cells (50) and/or event data pertaining to times of disconnection of the package (5) from an electrical circuit.