Yesterday my car would not start when I left a job site. Battery dead. I wired a 3 cell lipo into the car's electrical circuit and let it sit for a few minutes. The engine actually turned over but would not keep going. "Missed it by that much"*
A CAA boost got me onto the road to my car mechanic.
Last week Graham McNicol asked why I had a 3 cell lipo on my dashboard. Now he knows. 8)
Frank
https://www.youtube.com/watch?v=oPwrodxghrw