Any problem in using two battery maintainers at once?

Ya'll lost me there, but I would just wonder if there were two charging units and both are feeding current to a pair of connected battery banks, would not these chargers read the current from the other charger as 'full' and start cutting back before the battery bank(s) were fully charged? Seems I had that problem as a kid trying to charge a battery in a hurry using two separate chargers