There is potential for a extra battery module. It doesn't exist yet, but the connector supports power going from the expansion bay to the laptop[0], so someone

There is potential for a extra battery module. It doesn't exist yet, but the connector supports power going from the expansion bay to the laptop[0], so someone could build a battery module or potentially even a hot-swappable adapter to use a removable battery made for a more common laptop. [0] See pins 41-51,63-64 on https://github.com/FrameworkComputer/ExpansionBay/tree/main/Electrical#power-interface https://github.com/FrameworkComputer/ExpansionBay/tree/main/...