325ci wouldn't turn on so I got a jump and then when I turn it of
A working alternator can try to charge a bad battery but won't. Have the battery and charging system checked with a machine. Also note: your alternator is not designed to charge a battery. It is made to maintain the state of charge present in the battery. If the battery has been drained, then jumped, the alternator can put a surface charge there but will never fully charge the battery...This is only done with an external battery charger. Not doing this will over-work the alternator and shorten battery life!
×