It is possible that this power supply does not do a “turn off charger and test for presence of battery” type of test. It may only show the battery trouble when a battery is connected and is below 11.8 volts.
It is possible that this power supply does not do a “turn off charger and test for presence of battery” type of test. It may only show the battery trouble when a battery is connected and is below 11.8 volts.