I had to do a jump start the other day. 6 weeks idle while I was OS working (Chile).
Tried to jump it from a charged (slightly smaller) spare I had, but ended up having to swap batteries.
I guess too many cable losses and inertia to get it over the line.

Once running - I would have liked to then simply swap batteries back, but was concerned I might do some damage to the smarts.
If I could swap - that way I could have driven her around for a while to recharge it.
In the end I took the dead battery home and put it on the charger for 24hrs - (not preferred)

Anyone successfully swapped batteries - (like the good 'ol days) - with the car running - or is it now a thing of the past?