This is my first post, but I want to give an appreciative thanks to all of you who have contributed to solving this problem. I also inadvertently touched the key to the charging port and blew the fuse on my wife's RadCity 5 Plus Step-Throu. The small rubber cap does not stay closed on our battery charging port, which makes it even easier to short it out. I was able to replace the fuse with the battery still fully in the case. There is limited space but thanks to the excellent advice from everyone, I was able to cut the blue plastic without damaging the ribbon cable and replace the fuse with narrow needle-nosed pliers. The half-inch wood chisel worked very well for removing the u-shaped cap without damaging it. My wife is happy, and we are grateful for self-help communities like the Rad Owners Forum.