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

there is a choice between a 9v battery saver and a 12 volt battery saver.

by in Yorktown, VA on August 10, 2012
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1 answer
ANSWER by , August 10, 2012
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.