I'll go and test it out. I tried everything. Any idea as to why the 48V lights aren't flickering whatsoever?
I used to use a 8.4V battery for the longest time with no problems and then tried a 9V after the setup stopped working. The manual recommended a 9V. The original battery was rechargeable, too.
Final photo: https://www.dropbox.com/s/xnbh1wiiiks2s98/20170410_021504.jpg?dl=0