Described embodiments include an electric vehicle battery system and a method. The electric vehicle battery system includes a rechargeable traction battery pack configured to supply electric power to a propulsion system of a vehicle. The system includes a data-gathering module configured to monitor or test an aspect of the traction battery pack and in response to generate a traction battery pack status report. The system includes a gatekeeper module configured to permit or deny the rechargeable traction battery pack (i) supplying electric power to the propulsion system or (ii) receiving a recharge, the permit or deny in response to a management instruction issued by a remote battery manager system. The system includes a communication system configured to communicate with the remote battery manager. In an embodiment, the system includes an on-board charging system configured to recharge the rechargeable traction battery pack.