currently artifacts can only be activated on the strategic map and provide a variety of buffs, surprises and interesting strategic choices in every play through. I thought this would also be a cool idea if it was added  to the battle viewer. while the battle is progressing you could activate a charge at a certain point to change the tide of the battle. this type of feature would not ruin the pacing of the game because it is a single use action per battle. to limit this ability you could tie it to fleets that contain a commander that has a certain number slots to equip artifacts. this type of feature could make the battle viewer more fun and entertaining.