2008 E4 shows full charge and drops to 1 red bar

Ok, new issue, happened yesterday and again today. drove a little in my drive and stopped to load some wood, gem showing full charge started and went about 100’ then stopped and showed 1 bar charge. I had removed and cleaned all my battery cables about a month ago doing preventive maintenance and all has been well. got on in today all but one bar full. backed up out of garage, started off and died like I turned off switch. Battery display show 1 red bar. Yesterday I connected cord for 5 minutes, came and reset breaker. (i had tried that several time prior) car took off fine and used it to haul wood for about 30 more minutes. checked the cable again and all are clean and tight. any ideas on what my issue is?