It would give modules more uses other than just being for borgs its a bit rare to see borgs and the modules need to be researched and not a lot of people do research i think this is a good idea because you could just add a battery to the protogens whenever they use there modules
Also it would be awesome for ipcs and protogens to just have a toolbelt 
I dont really know what would be the downsides because more advanced modules need research and science is rare its like factions and a few civilians who even do it a battery for protogens would balance it i think so they have to recharge like IPCs and borgs too sense they have artificial parts or something