The adapter is new, never used.if you reverse polarity connected the battery to the output
The only thing I did was test the voltage to make sure the center pin in the plug was positive and that's when I discovered the low voltage, about 1.8 instead of 3vdc.
The vendor has refunded the purchase price so I am just trying to gain some experience working on it.
There are four connections on one side of the transformer and two on the other but I'm not sure what I should be seeing on any of them.
I looked for the reference numbers Hi Pot 66015620, RO1 SC22, 155-10A, c828-03 but didn't have any luck.