2005 BMW 525i Q&A

2005 BMW 525i Question: when changing the battery, what voltage should the power saver be?

there is a choice between a 9v battery saver and a 12 volt battery saver. -
Answer 1
A 9v power saver will be fine for keeping your radio and security settings. If you are planning on replacing batteries for a living then invest in the 12v. -