Power Bank for jump starting Cali - Advice Please.

[yossarian]

It's your van, operate as you wish, however here's what should be in your manual:

 

[Nigel Whitwood]

Most modern vehicles have a Battery Monitor connected to the -tve terminal to monitor voltage/current in & out for the efficient use of the Smart Alternator and help in the complicated emissions management. By connecting directly to the -tve battery terminal this monitoring is bypassed. So the vehicle will not immediately be aware of the battery state, and hence will be less efficient until a few drive cycles have passed.
Connecting the -tve lead as shown in Post 20 , downstream of the battery -tve pole is best if no chassis earth is within reach.

Thanks for the explanation.

 

[Nigel Whitwood]

It's your van, operate as you wish, however here's what should be in your manual:

View attachment 102797

It is, which is way I asked the question.