You can, if the pack your on has it, use a wireless charger to recharge your flux gear but moss only works on durability - the flux absorbs the damage that is normally done to the tool .. that's also why you can use the tool after its charge is gone but it takes damage ...which can be repaired via the moss ... but the tool still needs the RF to be recharged
Edit: just noticed the other similar reply ... oops
Edit 2: Not sure where the origin for the "getting RF out" is - but if its useful I think power suits allowed for the power from the suit to be used in the flux tools and the charge from tools flowed to the suit - not sure if there is any relevance.