My Gorgar's battery compartment has been out of order due to battery corrosion for over 10 years. I purchased a new battery holder online years ago but never had the nerve to try and replace. A few weeks ago members of Pinside helped me fix other problems on my Gorgar (solenoid fuse blowing due to 40 pin was the big one) and it gave me the confidence to try and replace the battery compartment. I've seen videos where people use a lithium replacements or move the battery holder to the side behind the backglass. Tonight I un-soldered the bad battery holder and placed the new one I purchased on the board. None of the pins lined up with the holes in the board. I was not happy. Determined to fix this, I came up with a solution that I am really happy with and have never seen anyone do before. Instead keeping the battery holder behind the backglass I decided to solder 6 five-foot wires (3 black for neg, 3 red for positive) to the board and run them below the playfield. I soldered 6 one-foot wires (3 black for neg, 3 red for positive) to the new battery holder and matched them to the wires I ran from behind the backglass. I connected the wires (numbering each to make sure they all matched) using electrical tape (for now) and put new batteries in. The battery holder is now located right at the coin drop. For the first time in over a decade my Gorgar did not start in test mode! What I like best about this solution is I do not have to remove the backglass to replace the batteries in the future and if I ever forget to do so, battery corrosion will not leak on the board. I am going to replace the electrical tape with connectors so don't scream at me now See pictures below of my mod fix...