turned key and all electric died. Good battery died. no lights no power nothing.

I got in my Suburban and turned the key. I heard a quick "fpsst" sound and may have
seen a light flash from the fuse box inside truck. all electrical went extremely dim.
without warning battery was almost dead and was fully charged and showed no signs
of weakening for weeks. tried getting a jump, lights would come on but engine
struggled to turn over then all electrical died. no lights,locks, windows. strange rapid
clicking coming from fuse relays in engine compartment. jumped again by removing
red battery cable. lights came on but engine struggled to turn over. Then all electrical
went completely dead, even with jumper cables still connected and other car running.