electrical system

Being in the process of purchasing a machine from a member here, I intend to use it for a trip to Norway with my daughter. As a result, I will be adding an Amplify to power 2 lots of heated clothing at some point, plus the additional USB chargers/installation of some denali lights. I have seen...

Recently bought a used 750 from BMW dealer, had 5K mile already done with 1 previous BMW employee owner. When I went to collect it the battery was dead, dead, dead. The dealer was able to jump start with small power pack. it seemed to start well for the next 1 week then I encountered the same...