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Old 13th September 2021, 08:00   #2
MSS
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Quote:
Originally Posted by macafee2 View Post
Went to start a car yesterday that had a flat battery, so flat the engine would not turn over.
Using jump leads I connected up a spare good battery that seemed fully charged. Still the car would either not turn over or only just turn over.

Did the flat battery nick "all" the power from the good battery and leave "nothing" for the car?

I had to connect my car up and leave the engine running for 5-10 minutes before the car with the flat battery would start.

macafee2

It is far more likely to be the case that the jump lead connection was incapable of carrying the required cranking current. This could occur, for example, if your chosen -ve connection point on the chassis is not a good current conductor.
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