you need to jump start a car.
tery had enough charge, then turn both off and disconnect the jump leads.
Everything I have said makes sense, you have either not read ot or misunde= rstood it.=20
The problem occurred on disconnecting the jump leads, leaving the started c= ar with a 'flat' battery drawing more curent than the charging system was intended to provide, OR a= s in my case, a defective battery, meaning no working battery in the circuit.
The Honest John/AA's jump-starting Youtube video recommends a method that= avoids this step, see above. If you'd read my earlier posts you'd have kn= own that.