Hello dears, I would have had a problem again. Woman calls to “the Volvo ( 850 DISEL ) went out after some warning lights (so pully everyone!) have lit up and didn’t jump on. The on board is connected booster……. swoops there he was again. to go out immediately again…. So I gave the starting aid, but every time I disconnected my cables suddenly all the lights on the Volvo darkened and the above warning lights lit or flickered so weak ……. battery measured= 7.5 volts. LiMA at the output 13.5 volts, so let’s go new battery bought = Marelli, 12 volts, 70 AH, 680 A } Built in. Starts immediately again…. But the warning lights start. At speed over 3000 you go out……….. So I ventured 10 km home because the elk is like to be near my tool. On the way determined on fast ride (so from 100) warning lights out. Slowly again or “Rumgeflacker” has experienced so often.