So I hooked up my 2 AI nero 3's to this icecap battery backup v3 and the pumps are powered up via the battery just fine and running normal... but I just decided to test it when the power goes out and turned the power brick off... but with power turned off, the nero's wont turn on with the battery backup. I checked the fuse and I'm pretty sure its seated properly, and considering its powering the pumps normally I don't understand what's wrong here. WHY?