I am aware that there have been threads and post about this subject before but I need some help anyway. I need to replace a battery in my NES cart and am the type of person who has never used a soldering iron. I have heard that electrical tape works but something is lost to me when I read up on how to do things. Does anyone have a step by step instruction with pictures? I noticed that at least one of the threads had someone that used a compression method to put in the battery with the electrical tape that worked well.

Any help would be greatly appreciated as I would like to experience Dragon Warrior for the first time without having to play it all in one sitting or resorting to emulation when I have the original stuff.