BMW M5 Forum and M6 Forums banner

auxilliary battery q

1285 Views 8 Replies 6 Participants Last post by  ride154
will changing my auxilliary battery help my car hold its charge for more than 2 days at a time?if not what exactly does it do?car has a new main battery and alternator btw
1 - 1 of 1 Posts
1 - 1 of 1 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.