The charge voltage was 13.5 +, but I had no way of determining if the Leaf had any substantial drain during this charging - should have disconnected it.
Right, one always needs to first check the standby current (drain) to be assured that there's no parasitic drain
(> 50 - 80 ma), e.g. the result of an ECU (controller) failing to enter its sleep mode. This is a very very common
problem with present day automotive electronics and its CAN bus technology that results in dead 12 volt
batteries. In some vehicles, it may take as long as ten minutes for all ECUs to enter their sleep mode,
thereby draining the battery with the vehicle being off. Remember, when you press the On/Off button
on the Leaf, the 12 volt battery power consumption isn't zero as was the case with non-electronically
controlled vehicles of the past.