(reposted from my post of the same in "pre-ea-test" channel)
I would like to suggest for a change to the connection methodology of the battery backpacks: make them a fully integrated power-source which augments the Caretaker's battery.
All the bonuses for the Caretaker's battery could remain exclusive to itself (the internal battery not including the battery backpack).
The battery backpacks would have a specialized connection, exclusive to the battery backpacks. It would charge at the same time as the Caretaker, as an equalized, augmented battery addition. This way, all the same connections to other devices could still be done via the "Connect (to self)" mechanism, but it would simplify the HUD options, as there would no longer need to be connection options exclusive to the battery backpacks.