Help me diagnose this please ... Turned the key and the starter worked for about one second, but then the entire electrical system blacked out. After a few seconds of trying again, the car simply started. The clock was now flashing indicating that indeed we lost full power to everything. All seamed well. Strong cranking, battery appears strong, etc... Days went by since that first occurrence, but then last night it happened again. In a similar fashion I turned the key and the starter kicks in for a second then .... electrical blackout. This time it did not come back. Just for the sake of it I tried to boost the car. It worked, car started and I drove away. But within 100 yards the car stalled and could not be started again. At this point the battery does appear drawn. I try to boost it again but this time the starter is sluggish, even when boosted, and the car is not able to start.