My own idea comes in two main changes, which are as follows:
- Provide default borgs with a passive "efficiency drive", which reduces the amount at which its power cell drains by about 80%. This means that no matter what size of power cell you put in a default borg, it's effectively five times bigger than it would be for other loadouts.
- With all this extra power, the borg needs a reason to use it, which brings me to the next change: a "power transfer cable" tool. The default borg can plug this into any device that runs on power cells, including APCs and other borgs, to transfer power from the default borg too the device in question. And yes, the power drained from the default borg is also reduced by the efficiency drive.