Being old I've tended to do things the old way. I use two 12 volt trolling motor batteries (one at a time) with my Minn Kota 55 HP motor. I do a lot of extended trips and recently discovered that Bass Pro sold a two bank 10/10 charger (XPS Model XPSi 10/10 that would charge both batteries without me having to change the clamps in the middle of the night while on a trip. Purchased the unit and installed it according to the directions. Plugged it in hoping for the best and got the blue power light - and nothing else. Discharged the batteries and tried again, same result. Have checked and double checked to make sure that the appropriate cables are attached to the correct posts etc.. I don't know what the magnetized pin is for. Is that my problem???? Can anyone help???