A power system that authenticates multiple battery packs to allow for power transfer between the battery packs and an external load system may include a plurality of modular battery packs, each of which may include a first housing, a plurality of battery cells enclosed in the first housing, a first interface for authentication communication, and a second interface that transmits power from the plurality of battery cells. The power system may also include a second housing configured to removably receive the plurality of modular battery packs, and a processing system that is configured to exchange authentication information with the plurality of modular battery packs through the respective first interfaces, wherein the respective second interfaces are only enabled to transmit power when the authentication information is validated.