Q: My truck decelerated from 65mph on a flat surface without any warning.

Let me preface by saying that about 6 months ago my check engine light came on and at inspection i was told i had an electrical issue but nothing was wrong with the engine, etc. The light went off-reappeared 1 month ago with a winter cold snap. Now, this fateful morning i was driving in the 1st lane (or the fast lane) at about 65 mph. I didn't hear any sound exactly, it was really that i felt a shift..a change . I immediately knew to look at my speedometer because i know that feeling all to well. Had i not been in the process of merging to my right anyway, i really don't think i would have made it to the shoulder. On the shoulder the truck shut off(i was still in gear and everything). Now i turned ignition off with flashers on. About 10-20 seconds i started it back up and it ran for like 5 sec but would not rev when i pushed pedal. Battery would not hold a charge long enough role windows up. Lights went out, radio,etc.Changed battery now It cranks strong like normal but wont roll over.

My car has 133000 miles.
My car has an automatic transmission.