Compressed Air Energy Storage for Create. An Air Engine banks your network's surplus rotational power as compressed air, then hands it back as torque when the network runs short.
Handheld tools that run off your Create backtank: a drill, a jackhammer, a 3x3 tunneller, a 5x5 borer, a tree-felling saw, a grinder, a buffer, a vacuum wand, and a wrench that powers a kinetic network while you hold it.
A Gravity Battery stores your network's surplus rotational power by winding a glued weight up a shaft, then lets it back down to drive the shaft when the network runs short.