I used the battery pack to start the B yesterday. Perfect until I stalled it letting the clutch out. Second time, no spark when I attached the black terminal to the strut brace and no crank. The battery pack was no longer at full charge so I plugged it in for a couple hours. Full charge now. Try #3, spark like I expected, got in the B and when I turned the ignition on, all the dashboard lights came on then there was a noise and all went black. No try #4. I’m afraid it was the electrical system although the battery died sometime in January and could be at the end of its life. It’s the difference between getting a shop to come out and replace the battery in a dark garage or having it towed. What do y’all think?